bluuebunny/crossref_metadata_2025 huggingface dataset:
Identification Method for Moving Loads over Continuous Beam Based on Bending Moment Influence Lines
Authors: Qian Chang Zhao , Chen Chang Ping , Xiao Yong Gang
Published: September 2014

Vehicle axle loads are modeled as moving loads and bridge is considered as a continuous beam. Based on the modal superposition theory, the model accelerations can be obtained from the accelerations of the bridge at several sections. Then based on the d’Alembertian theory, the inertia force of the bridge can be expressed approximately. Using the bending moment influence lines, the equations about flexural moment and moving force is obtained. Using the formulas, the moving force can be obtained at any time. Examples show that the method has high accuracy in identifying varying time moving force as well as constant moving force. This method has highly efficiency and appropriate to applying in engineering.
Study on Shear Lag Effect of a PC Box Girder Bridge with Corrugated Steel Webs under Self Weight
Authors: Jiang Rui Juan , Wu Qi Ming , Xiao Yu Feng , Yi Xiao Wei , Gai Wei Ming
Published: September 2014

In the present paper, based on the three-dimensional finite element analysis for a three-span continuous PC box girder bridge with corrugated steel webs and the corresponding conventional box girder bridge with concrete webs, a comparative study on the shear lag effect under self-weight is carryied out together with the analyslis on the coefficient of the effective flange width. The results show that At the sections in the negative bending moment near the intermediate piers, the shear lag effect in the bridge with corrugated steel webs is more obvious than that in the bridge with concrete webs by 8%; and the corresponding effective flange width coefficient in the bridge with corrugated steel webs is even smaller than 0.9, so the shear lag effect at these sections should be considered in the design of this type of bridges. At the mid-span section of the middle span of a three-span continuous bridge either with corrugated steel webs or concrete webs, the shear lag effect can be omitted since the corresponding effective flange width coefficient there is close to 1.0.
Development of a Model to Predict Pavement Temperature for Brak Region in Libya
Authors: Salem Hassan Awadat , Uzelac Djordje , Crvenkovic Zagorka Lozanov , Matic Bojan
Published: September 2014

Asphalt pavements form an integral part of any transportation system. The structural capacity of the hot mix asphalt concrete layers depends on many factors including its temperature. Moreover, temperature can be a major contributor to several types of distresses. Therefore, temperature is a significant factor that affects the performance and life span of a pavement. The Libyan road network expanded at a phenomenal pace from approximately 1500 km of paved roads in 1970 to morethan 100,000 km in 2008. Brak region is located on the southern east of Libya at latitude (27°31'N) in the desert. With the recent SHRP and LTTP research findings, it was necessary to investigate the applicability of the models developed from these research studies to Brak's environmental conditions and more generally to the rest of Libyan desert reigions. This paper presents the research undertaken to develop models to predict high and low asphalt pavement temperatures in the Brak region . A pavement monitoring station was set-up in Brak to monitor air and pavement temperatures in different depth, wind speed and solar radiation. Data were collected for 365days. Daily minimum and maximum temperatures were recorded. A regression analysis was used to develop the minimum and maximum pavement temperature models, using air temperature, wind speed and solar radiation. This paper presents a new model for predicting maximum and minimum surface pavement temperature based on data collected by installed pavement monitoring station set-up at the Brak region.
Orthogonality Analysis Method of Sensibility on Factor of Sand Embankment Slope Stability
Authors: Tan Peng , Qian Jing Song , Yang Ge
Published: September 2014

In order to clear the slope geometry, surrounding soil parameters, sand filling parameter and other factors on the degree of influence of sand embankment slope stability, the sensitivity of the sand embankment slope stability influences factors was analyzed by using the orthogonality analysis method. The results show that the sequence of these influencing factors in terms of the influencing degree on the slope stability is embankment height > the friction angle of sand > the friction angle of surrounding soil > the cohesive strength of surrounding soil > slope gradient > the cohesive strength of sand > the bulk density of surrounding soil > thickness of surrounding soil > top layer thickness > the bulk density of sand. The embankment height, the friction angle of sand and the friction angle of surrounding soil are highly significant factors. The cohesive strength of surrounding soil, slope gradient and the cohesive strength of sand are significant factors.
Study on Deformation Influence of Deep Foundation Pit Pile-Anchor Supporting System Nearby Metro Structure
Authors: Peng Hua , Xiao Xiao Qi , Dong Zhi Yong
Published: September 2014

In the big cities, any construction nearby the metro structure become critical to the safety of the metro,especially for deep foundation pit engineering.In such case,Pile-anchor supporting system is normally used, however different deformation shape of the supporting wall will bring different deformation of the metro structure.This paper analysed the relations between the pile-anchor supporting system and the nearby metro structures and stated how to control the nearby metro structure deformation through the design of the Pile-anchor supporting system.The analysis showed the following conclusions:If the nearby metro structure is closer to the ground surface, it will be more sensitive to the deformation of the piles-anchor system;Shape 1 & 2 are better to control the metro structure deformation,Shape 3 will result bigger settlement;the metro structure above and in the middle of the foundation bottom level are very much influenced by the deformation of the piles;If the deformation of metro structure exceeds the allowable value, other measures should be considered.
Study on Technical Index of Raw Material for Tianjin Permeable Asphalt Pavement
Authors: Di Sheng Guan , Guo Teng Teng , Wang Xin Qi , Wang Chao Hui
Published: September 2014

According to the problem that the cohesiveness and durability of permeable asphalt pavement is poorer than common dense gradation asphalt mixtures, on the premise of improving the permeability, in order to meet the service performance and durability of permeable asphalt pavement, through the investigation of technical requirements on permeable asphalt pavement raw material in Japan and several endemic standards of China where permeable pavement technology is mature, combined with climatic characteristics in Tianjin, the technical requirements suggested values of permeable asphalt mixture suitable for Tianjin are put forward.
The Rheological Behavior about High-Modulus Modified Asphalt
Authors: Yu Wu
Published: September 2014

To get a grip on the influence of different factors on rheological properties of high modulus asphalt, the method of DSR measurement is made in a systematic study of different temperatures, loading frequency,strain 70# base asphalt and rheological properties of high modulus asphalt. The experimental results show that high-modulus asphalt has a low sensitivity to temperature. Compared with the base asphalt, the high-modulus modified asphalt’s G*/sinδ will have a slower decrease under the condition of temperature increase. Both asphalt’s G*/sinδ would decrease with the decrease of load frequency, high-modulus asphalt has a higher G*/sinδ than base asphalt especially at the higher temperature and lower frequency.
Costal Structure Design with Wave Condition Prediction
Authors: Lin Xue Hui , Lu Zhao , Zuo Ren Yu
Published: September 2014

This paper introduces a coastal structure design to protect a reclamation site, which will be fixed at a level of +8 m above the chart datum. A jetty will be also used for loading and unloading of materials from the plant that will be developed on the nearby reclamation site. From the given site contours and water depth data, the bottom slope of the sandy foreshore can be determined. In order to design the coastal structure, the wave climate must be considered and analyzed in priority. For the vertical breakwater to be located on the other side of the berth jetty, the required base and height was determined. In addition, the seawalls for the reclamation platform were analyzed at different water depths.
Numerical Simulation of Wave Transformation Using Spectral Wave Action Model
Authors: Zhang Yun Peng , Zhang Ming Liang , Hao Zi Ning , Xu Yuan Yuan , Qiao Yang
Published: September 2014

This paper presents a spectral wave action model to simulate random wave deformation and transformation. The wave model is based on the wave action balance equation and can simulate wave fields by accounting for wave breaking, shoaling, refraction, diffraction and wind effect in coastal waters. It is a finite-difference, phase averaged model for the steady-state wave spectral transformation. The wave model is applied to verify different experimental cases and real life case of considering the several factor effects. The calculated results agree with the experimental and field data. The results show that the wave model presented herein should be useful in simulating the wave transformation processes in complicated coastal waters.
Effect of Different Kinds of CaSO4 Whisker on the Bending Strength and Hygroscopicity of Gypsum Board
Authors: Chen Chang , Wang Yu Bin , Wang Hua , Deng Qian Qian , Du Lei , Gao Guo Sheng , Luan Feng Chen
Published: September 2014

Different kinds of hemihydrate calcium sulfate whiskers were fabricated by calcination method under the condition of 115-600 °C. And the density, moisture rate and mechanical properties of composites of gypsum and whisker were studied. The specific strength of composites was investigated. The results show that gypsum boards with whisker calcined at 115 °C and 300 °C have the maximum and minimum densities, which are about 1658 kg/m3 and 1604 kg/m3, respectively. Hydration ability of anhydrous calcium sulfate whisker is the strongest. The values of specific strength of gypsum board reinforced by different types of whiskers suggested that the porosity of the composites changed with the different kinds of whiskers, which agreed well with the moisture rate and mechanical properties.
Engineering Properties of Bed Sediment as Embankment Material in Yi-River Shandong China
Authors: Yang Ling Qiang , Wang Yan
Published: September 2014

Embankment stability can be improved by using good quality fill materials, applying intensive management, and constructing appropriate hydraulic structures. The good quality the fill material for a embankment in the field is the most important factor of embankment construction technology, which uses bed sediment to ensure the safety and cost effectiveness of an embankment. Also, the field compaction characteristics of poorly-graded sand (SP), distributed largely in Yi-river of China in mixing with granitic weathered soil (SW), are analyzed.
Experimental Study on Mechanical Behaviors of Damaged RC Beams after Reinforcement
Authors: Li Cong Qi , Ge Wen Jie , Cao Da Fu , Pan Ling Long , Wang Bi Yuan
Published: September 2014

Based on 6 testing beams in site cast, the mechanical behaviors of RC beams after reinforcement are analyzed. Concrete-replacing and grouting were used to reinforce the damaged component. When the reinforcement materials reached sufficient strength and maturity, beams were subjected to experiments of bending bearing capacity. Cracking load and ultimate bearing capacity were analyzed relatively, drawing some conclusions which could use as the reference of reinforcing concrete structure after damage.
Hydration Ability of Hemihydrate Calcium Sulphate Whiskers with Different Content of Sodium Phosphate
Authors: Chen Chang , Wang Yu Bin , Yu Le , Song Ying Jie , Zhang Shan Shan , Zhang Ai
Published: September 2014

Different content of sodium phosphate was added into the hemihydrates sulphate whiskers for 30 min to 2h of standing time. The treated products were researched by SEM, TG-DSC and XRD. The results indicate that when the dosage of sodium phosphate was more than 0.10%, the morphology of hemihydrate calcium sulphate whisker was fully maintained. However, the crystal structure of the products had changed and the half water calcium sulfate turned into of dihydrate calcium sulphate when 0.10 wt% sodium phosphate added. With the increase of standing time, half water calcium sulfate whisker converted into dihydrate calcium sulphate whisker. Sodium phosphate could reduce hydration ability of half water calcium sulfate whisker when the content of sodium phosphate was more than 0.10%.
Mechanical Behavior for RC Beams Strengthened with Near-Surface-Mounted Bars Considering Effect of Secondary Loading
Authors: Zhang Hai Xia , Pei Jia Wei , He Lu Yuan
Published: September 2014

Compared with other strengthening methods, NSM FRP bars strengthening method has obvious advantages in bond property and fire prevention performance. In accordance with current experimental study and the theory of concrete beams strengthened in bending with FRP are introduced, and the effect of FRP bars strengthening quantity on failure modes of reinforcement beams and the initial load level influence on the ultimate bearing capacity are analyzed. It provides a basis for further research and application in China.
Pipeline Anticorrosion Materials and Development Trend
Authors: Wang Ya Li
Published: September 2014

Introduced the current situation at home and abroad pipeline anticorrosion technology, commonly used in the melting epoxy powder, adhesive tape, anticorrosion, multilayer structure coal tar epoxy, polyurethane extruded polyethylene anticorrosion technology. High performance synthetic resin, filler, pigment, anticorrosion material will have greater development, along with the application of pipeline anticorrosion technology in construction, chemical, oil and other industries, the pipeline anticorrosion technology will have larger development space.
Regression Analysis on Bonding Test of Polypropylene Fiber
Authors: Xuan Wei Hong , Wang Yan , Chen Yu Zhi
Published: September 2014

Base on the data that gained from pullout test of Polypropylene fiber, multi-factor regression analysis considering water cement ratio and age of cement matrix, length and angle of embedded fiber was carried out. Then, a practical function of pullout force-displacement was proposed, which is well agreed with the test results.
Research Progress of Strain-Rate Effect on Mechanical Properties of Concrete
Authors: Zhou Hong Yu , Chen Yi Bo , Zhang Ya Ran , Wang Hai Qian
Published: September 2014

Introducing research progress of rate-dependent tests by domestic and foreign scholars, strain-rate effect on dynamic mechanical properties of concrete are reviewed. Classified descriptions of research results on dynamic load tests of concrete at home and abroad are provided, including uniaxial compression tests, uniaxial tensile tests, and multi-axis tests; strain-rate effects on concrete strength and deformation properties in each test are respectively discussed; and strain-rate effect on concrete energy absorption capability are described.
Measurement Analysis of Mechanical Properties of Round-Ended Concrete Filled Steel Tube Coupled Tower Column during Construction Phase
Authors: Chen Wen Feng , Li Bin , Li Yan
Published: September 2014

Steel-concrete composite structures are widely used in large-span spatial structures, high-rise building, super high-rise building and bridges and so on thanks to its advantages in terms of mechanical and construction properties. And the corresponding design codes on circular, square and polygonal concrete filled steel tube (CFST) have been formed at home and abroad. However, application of round-ended CFST is still very rare in the world and there is no corresponding theoretical research findings and design basis. There is an actual project that a round-ended CFST coupled tower column is applied in Houhu Bridge in Huangpi area, Wuhan city. Real-time stresses of the coupled tower column were monitored throughout construction phase to ensure that the force and linearity of Houhu Bridge can meet its design requirements. In the paper, the real-time stress monitoring data is analyzed so as to find force state and force characteristics of this new structure of round-ended CFST during construction phase. This study provides basic information for further formation of round-ended CFST design theory in future which plays an important role in engineering application of the round-ended CFST.
Study on the Mechanical Properties of Lime-Cement-Treated Loess Soils
Authors: Zhi Bin , Yang Liang , Liu En Long
Published: September 2014

The cement-lime treated loess soils and cement-treated loess soils are widely used all over the world, but their strength features and physical mechanism are investigated few at the moment. The cement-lime treated loess soil samples and cement-treated loess soil samples were prepared according to their weight ratio and tested to study their physical indices and strength varying with age. The tested results demonstrate that: (i) The content of cement has great influence on the liquid limit and plastic limit of the samples. With the increase of adding content of lime, the average plasticity indices also increase gradually, and the values of plastic limits of the samples will also increase; (ii) The stregnth of the samples increases with the increase of curing age, which is affected by many factors including treated materials, compatcion work, water content, and age.
Analysis on the Use of Building Materials in Villas of Mount Lu
Authors: Li Xiao Qiong , Zou Lei Rong
Published: September 2014

Modern villas in East and West Valleys of Mount Lu have witnessed the importance of Mount Lu in Chinese modern history, their unique design and elegant environment have high historical value and artistic value,and they are iconic landscapes in Mount Lu scenic area. In this paper, Mount Lu villas are the main research object, types of construction material and key use were analyzed. "Stone villas give Mount Lu personality", the author revealed unique building materials and obvious construction features of Mount Lu villas, which offered a systematic theoretical basis for protection, restoration and reconstruction of modern villas in Mount Lu.
The Research on Mechanical Properties of Foam Concrete Mixed with Glazed Hollow Beads
Authors: Liu Yang , Zhang Ze Ping , Ma Xin
Published: September 2014

Adding glazed hollow beads in ordinary foam concrete, the thermal insulation, dimensional stability, waterproofness and cracking resistance would be improved. Through testing the basic mechanical properties of foam concrete mixed with different mix amount of glazed hollow beads and then comparing and theoretical analyzing results obtained, it is concluded that when the content of glazed hollow beads is 30%, the mechanical properties of foam concrete is better than other schemes.
Study on Properties of Self-Compacting Concrete Prepared with Coarse Recycled Concrete Aggregate
Authors: Yu Jian Jie , Gong Jian , Zou Jie Ming , Yang Wei Kang
Published: September 2014

Self-compacting concrete is absent of vibration noise during casting, improves the construction efficiency, and provides a healthier working environment compared to the traditional vibrated concrete. The potential coarse recycled aggregate obtained from crushed concrete for making self-compacting concrete was considered to replace the aggregate with the percentage of substitution of recycled coarse aggregate 0%, 50% and 100%. Thus, three types of concrete mixtures were made. Experiments show that, the properties of these concrete only have slight differences and recycled coarse aggregate can be successfully used for the preparation of self-compacting concrete. The method solves the problem of the waste disposal by the demolition of old buildings.
Study on Application Properties of PCM Mortars
Authors: Hu Xiao Na , Li Yin
Published: September 2014

Lauryl alcohol mixed paraffin to prepare PCM mortars. Study on the heat storage using DSC equipment; study on the temperature level and temperature time by boilingwater; the DRM-II type "heat storage coefficient measuring instrument is used to check heat storage coefficient,and analysis the thermal inertia through heat storage coefficient and thermal conductivity.
Life Cycle Model of Ultra High Toughness Cementitious Composites Exterior Walls
Authors: Wang Dan , Bai Hui Ren
Published: September 2014

In order to research ultra high toughness cementitious composites (UHTCC) economic rationality, this paper chooses the ultra high toughness cementitious composites thermal insulation wall as the research object, uses the study of life cycle method. Establish full life-cycle model with basic life-cycle economic evaluation principle. Evaluate its economic rationality. The results show that ultra high toughness cementitious composites facade has a longer life cycle than ordinary concrete wall. And their local repair costs are all the same, but their maintain frequencies are different. UHTCC facades facing layer does not require maintenance. The calculated models of the two walls are different.
Analysis of the Deformation Characteristics of the Prefabricated Bamboo Reinforced Porous Concrete Slab
Authors: Yang Yong Min , Cai Jie Long , Li Yao , Chen Ze Peng , Zhang Jun Lu
Published: September 2014

The paper study the deformation characteristics of the Prefabricated bamboo reinforced porous concrete slab through points with four points focused beam loading method. The results show that flexural behavior of prefab slab can be improved by adding bamboo reinforcement. Along with the increase of bamboo reinforcement ratio, deflection of prefab board will gradually reduce. Through the loading deflection curve, we can discover that the bamboo reinforced prefab slab with the linear elastic state, and the slab can withstand a certain load after cracking. Bamboo reinforced with strengthening and toughening effect for porous concrete, prefabricated bamboo reinforced porous concrete plate can be used better in slope protection engineering.
Experimental Investigations on Mechanical Properties of Hybrid Steel-Polypropylene Fiber-Reinforced Concrete
Authors: Shan Liang , Zhang Liang , Xu Li Hua
Published: September 2014

The mechanical tests of hybrid steel-polypropylene fiber-reinforced concrete (HSPFRC) have been carried out. Concretes containing different volume fraction and aspect ratio of steel and polypropylene fibers mixed in one concrete grade were critically analyzed in terms of compressive, split tensile, axial tensile properties. Test results show that the fibers, when used in a hybrid form, can result in superior mechanical performance compared to their individual fiber-reinforced concretes.
Rural Residential Wall Construction Technology Vitrified Microsphere Thermal Insulation System of Shanxi Luliang
Authors: Zhang Ze Ping , Li Fei Fei , Yu Jia
Published: September 2014

The experimental studies have suggested that thermal insulation glazed hollow bead mortar is a splendid material with thermal insulation and energy conservation. The practices also prove that this material can produce excellent thermal conservation effect when it is applied to building with the request for thermal insulation and energy conservation. In light of the fact that the thermal insulation gazed hollow bead mortar hasn’t been spread in Luliang rural area, taking the actual environment in this area and the special method of the building’s construction into consideration, the construction technology of the thermal insulation gazed hollow bead mortar regarding the thermal insulation and energy conservation of the residential wall will be expounded.
The Construction Technology Control Method for Large Scale Concrete Counterforce Wall Prestressed with Unbonded Tendons
Authors: Sun Jin Kun , Liu Jin , Zhou Bing Mei , Lv Tao
Published: September 2014

Based on the characteristics of the large scale concrete counterforce wall design burdening heavy, the nonstructural section wide, belonging to the large volume, and the construction difficulty and precision being required high, apply the Construction technology of unbonded prestressed concrete. According to the aspects of material the preparation stage of construction, on-site construction stage marching into the arena, the blanking of prestressed with unbonded tendons, the manufacture of fixed end, the install of prestressed reinforcement, the pouring of the large volume, the tension of prestressed, ect. Raising the points of niche targeting technology control of construction for the similar construction provides with the beneficial experiential learning.
Analysis of the Wall Cracks Control in Multistory Building
Authors: Li Sheng Nan , Wang Li Xue , Zheng Wen Juan
Published: September 2014

Wall cracking is a universal phenomenon existing in the composite structure house, prevention and control of masonry crack is a systematic project. the reason of crack on the temperature change, uneven settlement of foundation, construction factors and dry shrinkage of material.It put forward the corresponding control measures：to set reasonably temperature expansion joint, settlement joint and adopt construction measures when designing structure;to make reasonable arrangements for the construction of the roof insulation layer ,trying to avoid high temperature season; As for the materials,it is recommended to use fiber mortar to improve the waterproof performance of the wall.Above all, the paper want to show that cracking control can be achieved by the close coordination of all aspects of design, construction, supervision.
Numerical Solution of Bending Problem for Elliptical Plate Using Differentiation Matrix Method Based on Barycentric Lagrange Interpolation
Authors: Wang Zhao Qing , Jiang Jian , Tang Bing Tao , Zheng Wei
Published: September 2014

A differentiation matrix method based on barycentric Lagrange interpolation for numerical analysis of bending problem for elliptical plate is presented. Embedded the elliptical domain into a rectangular, the barycentric Lagrange interpolation in tensor form is used to approximate unknown function. The governing equation of bending plate is discretized by the differentiation matrix derived from barycentric Lagrange interpolation to form a system of algebraic equations. The boundary conditions on curved boundary are directly discretized using barycentric Lagrange interpolation. Combining discrete algebraic equations of governing equation and boundary conditions to form an over-constraints system of equations, the numerical solutions on rectangular can be obtained by solving it. Then, the numerical solutions on elliptical domain are obtained by interpolating the data on rectangular. Numerical results of elliptical plate with uniform load illustrate the effectiveness and accuracy of the proposed method.
Analysis of MDOF Pseudo-Dynamic Test Design of High Flexible Structure
Authors: Liu Hong Biao , Zhang Qiang , Liu Xian Peng
Published: September 2014

In order to point out the main factors in MDOF pseudo-dynamic test design of high-rise flexible, the key points in pseudo-dynamic test design using equivalent MDOF system were analyzed based on the theoretic derivation and numerical simulation, and the problems to notice in test design were pointed out, the pseudo-dynamic test results validity of high piers based on equivalent SDOF system was discussed, and the impact of high mode to the earthquake response of high-rise flexible structure was acquired. The results of numerical simulation of lumped-mass model prove that the contribution of high mode to the displacement of high flexible structure is little, and the displacement is mainly provided by the first-order mode, which is nothing to do with the selection of seismic waves. However, the high mode have great influence on seismic base shear and base moment of high flexible structure, and the influence level is associated with the properties of seismic wave spectrum. Under one specific earthquake wave, the second-order vibration may play a main contribution to seismic base shear and base moment of high-rise flexible structure. Therefore, it is proper to use equivalent two-degree of freedom system in pseudo-dynamic test of high piers. However, if using equivalent SDOF system, the structural displacement response is correct while the strain data and experimental phenomenon may be untrue. The conclusion proposed is significant in guiding the pseudo dynamic test design of high-rise flexible structure and ensuring the rationality of test.
Seismic Performance Evaluation of Buildings in Taiwan
Authors: Lin Jeng Hsiang
Published: September 2014

Integrating the available research results from fragility analysis of building structures and seismic hazard analysis, this study explored some probability information for current earthquake resistant design for general buildings and examined structural performance of buildings under the action of earthquake motions. The results of this study show that performance objectives suggested by FEMA are not realized for the buildings of light steel, pre-cast concrete, reinforced masonry, and un-reinforced masonry, designed according to the Taiwan seismic design standards. The results may provide some valuable information for future code calibration in Taiwan.
The Research of Seismic Behavior of the Brick-Wood Building in the Northeast
Authors: Yu De Long , Sun Bai Tao , Yan Pei Lei
Published: September 2014

In Northeast China, brick-wood building is widely distributed, but due to the absence of the seismic code, there are many differences between structure and construction technology in different regions .That makes the seismic capacity is uneven. Therefore, we chose the typical brick-wood building in the Northeast as the object of study. Based on seismic data in QianGuo earthquake, using numerical simulation technique to analyze the earthquake damage and failure mechanism of brick-wood building, explores the causes of seismic damage. On this basis, we proposed the new seismic reinforcement technology measures, by comparison has gone through a transformation of a typical brick-wood building aseismic capacity significantly better than the prototype. Meanwhile, this research helps to understand the seismic performance of brick-wood buildings in the Northeast, and to develop appropriate policies on disaster for the region is of great significance.
Out-of-Plane Elastic Stability Analysis of Parabolic and Circular Arches
Authors: Fan Jun Jian , Xi Kuan Tang
Published: September 2014

Effects of different load modes, rise-span ratios and support conditions on out-of-plane buckling and differences between parabolic and circular arches were studied. With the increase of rise-span ratio, buckling loads of arches under vertical load uniformly distributed along the horizontal line get bigger and bigger compared with those of vertical load uniformly distributed along the axis. With increase of rise-span ratio, the buckling loads of hingeless and two-hinged arch increase after decrease, then decrease. The buckling load of three-hinged arch decreases after increases. When rise-span ratio is small, support condition has a great influence on out-of-plane buckling. The parabolic arch is better than circular arch in out-of-plane stability and economy. But circular arch is better than parabolic arch in manufacture.
Seismic Technology of New Type Prefabricated-Slab in Masonry Structure
Authors: Hu Qi Gao , Zhang Fan Zhen , Cui Wei Feng
Published: September 2014

Structure Collapse failure is the main reason leading to casualties and property damage when an earthquake occurs. In this article, the masonry structure with prefabricated slab is as the object of study. The damage reason and shortcoming of masonry structure during earthquake are in deep analysis through the structural defect, design reinforcement, engineering quality and other aspects. A new type anti-seismic prefabricated slab is designed aiming at the defects of traditional one. Prefabricated slab vertical and horizontal connections were set closed. The joint bars in these two directions were respectively used to connect prefabricated slabs. All the floor slabs were joined to form a whole after the concrete pouring around the plates, which enhanced the floor stiffness and integrity. So the purpose for ultimately improving the anti-seismic performance of masonry structure purposes was accomplished. The comparative analysis of numerical simulation for masonry structure also shows that the overall seismic behavior of the structure has been greatly improved due to the increasing in prefabricated vertical and horizontal joint elements.
Failure Characteristic of Granite under Cyclic Loading with Different Frequencies
Authors: Ni Xiao Hui
Published: September 2014

The uniaxial cyclic fatigue tests on granite coming from the ChangJiang of Hainan nuclear power first-stage construction conventional island were done on the RMT-150B multi-function automatic rigid rock servo material testing machine. Stress amplitude of 10 MPa and sine wave cyclic loads with five different frequencies of 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, and 1 Hz were adopted as dynamic disturbance. The law between cyclic frequency and dynamic stress-dynamic strain hysteretic curve, dynamic elastic modulus and damping ratio are researched. The results showed that the curves of strain and stress for loading and unloading are not superposition under cyclic loading, but hysteretic loops. When cyclic frequency changes between 0.01 and 1.0 Hz, the granite hysteretic loop area, dynamic elastic modulus and damping ratio are increased with frequency increasing. The research result offered great reference value to seismic response analysis and site safety evaluation of the changjiang nuclear power.
Overview of Research Progress for Concrete-Filled Steel Tubular Columns after Exposure to Fire
Authors: Pan Yan Chong , Wang Guo Hui , Xiang Kai
Published: September 2014

Fire safety is one of the most important performances index to evaluate building structures. The property of building members after exposure to fire involved with the safety of buildings after fire, and it will be necessary to estimate the post-fire residual strength of the structure in order to decide the appropriate strategy for repair. This paper summarizes the research progress of concrete-filled steel tubular (CFST) columns. Basic mechanical properties of conventional CFST columns after exposure to fire, CFST columns after the whole fire exposure process under sustained axial load, and CFST columns with special forms after exposure to fire are discussed.
Assessments on Fire and Explosion of Petrochemical Wharf Storage Tank Area Using DOW Method and Fuzzy Comprehensive Evaluation Model
Authors: Peng Shi Tao , Sun Yi , Zhou Ran , Wang Xiao Li , Guan Wen Ling
Published: September 2014

Based on the features of fire and explosion accidents in petrochemical wharf storage tank area, the DOW method and fuzzy comprehensive evaluation method were applied to evaluate risk of fire and explosion. First of all, DOW method was employed to evaluate the hazard of fire and explosion of petrochemical wharf storage tank area preliminarily and risk indexes of various tanks were obtained. Then, 5 first-level and 24 second-level indexes were identified by the fuzzy mathematics, in which the entropy weight method was introduced to determine weight vector of arrangement analysis, and applied to an actual risk evaluation for a petrochemical wharf storage tank area to determine fuzzy sets. On the basis of the weighted average method, the risk level is medium. Arranges the second-level indexes, and the main factors affecting the accident were concluded,including the violation rate of labor discipline, characteristics of hazardous materials, fire facilities, safety checks, operation of the security emergency response system and so on.
Collapse-Prevention Design and Damage-Reduction Seismic Performance Analysis of Bridges
Authors: Zhang Yu Min , Cui Ying , Liu Jing
Published: September 2014

As the crucial junction in transportation lines, more attention should pay to the safety of bridges. However, the collapse of bridges under earthquake threats the safe of lifeline engineering seriously. Unseating prevention devices are the effective structural measure to prevent collapse under unexpected earthquake. The design of unseating prevention devices need not only to meet the deformation demand of bridge during normal operations, but also to limit the oversize displacement under unexpected earthquake. Combined with relational design standards at home and abroad, unseating prevention devices have been designed for bridge to prevent collapse. The research results show that the unseating prevention devices with reasonable parameter will decrease the relative displacement between superstructure and substructure, improve the seismic performance and integrality of bridge, and make the seismic load to be well-distributed among the piers.
Numerical Analysis of Rigid and Flexible Reflection of Air Shock Wave
Authors: Zhang Yao , Yan Dong Jin , Nian Xin Zhe , Zhang Qian Li
Published: September 2014

To study the difference between the reflected pressures of air shock wave on the rigid and flexible walls, the FE models of RC anti-blast wall and high-strength polyethylene fiber textile anti-blast wall were set up and the FSI solver of LS-DYNA was used to perform the numerical simulation. The TNT charge weight used in simulation is 5kg, 10kg, 15kg and 20kg, respectively. The peak reflected overpressures of air shock wave on the two kinds of walls were obtained. The variation of reflection coefficient of air shock wave on the anti-blast wall with scaled explosion distance and the wall stiffness was analyzed.
Research on Compressive Strength of Grouted Dry-Stack Concrete Block Masonry
Authors: He Xi Xi , Lin Ye
Published: September 2014

Compressive strengths of full-grouted dry-stack concrete block masonry were tested. Contribution of block and grouted concrete in carrying capacity of the masonry were analyzed through compressive strength data of 18 specimens. Related masonry capacity formulas were recommended accordingly.
Cause Analysis of Zhaohe Debris Flow in Erlong Town in Zhenping County in Henan Province
Authors: Zhang Wei
Published: September 2014

Debris flow is one of the major geological disasters in mountain areas. This paper systematically analyzes the influence of steep terrain conditions, the development of regional structure, neotectonic movement and earthquake, wide distribution of debris, human engineering activity and rainfall concentrated climate conditions in debris flow area. The dominant factors inducing Zhaohe debris flow were revealed, providing guidance for the debris flow disaster prevention, as well as reference for the same area debris flow cause analysis.
Research on Reinforced Concrete Beam Enlarged Cross Section Method Experiment and Finite Element Simulation
Authors: Li Yuan Yuan , Guo Bin , Liu Jiang
Published: September 2014

Increasing the beam cross section is a kind of traditional and universal strengthening methods of civil structure. The mechanical performance test were studied on the mechanics performance and deformation of four reinforced concrete beams in this study. The results show that increase of the cross section and tensile area at the bottom of the steel could effectively improve the performance of mechanical. The beam crack load, yield load, ultimate load and bending strength are increasing with cross section and mechanical. By simulating the relationship bwteen load and deflection. It is concluded that The finite element simulation of reinforced concrete beam with the reasonable concrete unit and reinforced unit can meet the demand of practical engineering.
A Solution for Space Resection Based on Angle-Axis Representation
Authors: Ma Kai Feng , Cui Xi Min , Huang Gui Ping , Yuan De Bao , Cai Qing Kong
Published: September 2014

Determining exterior orientation elements of image is an important task in photogrammetry. Considering some shortcomings in various classical methods, a new algorithm based on angle-axis to represent rotation was presented. Based on the least square principle, the closed-form solution of angle-axis and coordinates of perspective centre were solved out first; then the rotation matrix and angular elements were derived. Lastly the six exterior orientation elements were obtained. Compared with the traditional space resection based on the classical collinearity equation (Euler angles) method, angle-axis representation method of space resection can be removed from a large number of cumbersome trigonometric functions, simple equations structure, easy to program implementation. Simulation data test described space resection solution based on angle-axis is fast, effective and stable.
Design and Realization of Scenic Spot Electronic Sand Table Based on ArcGIS
Authors: Li Hai Yan
Published: September 2014

The design and Realization of the scenic spot electronic sand table system as the core of electronic sand table, such as remote sensing, and geographic information system, 3D simulation technology and other related concepts were introduced, the electronic sand table overall data structure and process analysis, discusses how to establish the electronic sand table based on ArcGIS software and realize its function, resulting inconvenience the tour guide teaching at the same time,upgrade the development level of tour industry.
Investigation of Deep Joints and Analysis of Lode Extension Direction in Shapinggou Molybdenum Mine
Authors: Han Zeng Qiang , Wang Chuan Ying , Zhu Heng Yin
Published: September 2014

By investigating on the joints and fissures in Shapinggou molybdenum mine based on digital borehole camera technology, the dominant orientation of joint fissure in surrounding rock and ore body were statistically analyzed. Applying the theory of metallogeny and geostatistics, the relationship between joint fissure and lode’s extension direction is explored. The results indicate that joints in the ore body of ZK61borehole have only one dominant orientation SE126°∠68°, however, the dominant orientations of joints in surrounding rock were SE118°∠73°, SW225°∠70°and SE122°∠65°, NE79°∠63°. Then a preliminary conclusion showed that the lode’s extension direction is specific and it is influenced by joints of surrounding rock. Results of other boreholes are generally agree well with the ZK61, suggesting the analysis reliably reflects the lode’s extension properties and the conclusion presents important references for deep ore prospecting.
Measurement of Depth Using the Expendable Conductivity, Temperature and Depth Profiler Based on the Technique of Information Fusion
Authors: He Hai Jing , Yang Qian , Lei Zhuo
Published: September 2014

Two methods of depth measurement by the expendable temperature, conductivity and depth profiler are introduced in this paper. For their shortages, the measurement of pressure sensor and the theoretical calculations of depth were fused by the Kalman filtering algorithm. The depth measurement from the pressure sensor is corrected in real time. It is validated by the experiments that the algorithm can significantly improve the accuracy of depth measurement. The phenomenon of clutter and knotted in profile data of temperature and salinity due to fluctuation of depth data can be corrected as well.
Registration of Building Intensity Image and its Color Image Using SIFT Algorithm
Authors: Cang Gui Hua , Yue Jian Ping
Published: September 2014

Fusion of close range photogrammetry (CRP) and terrestrial laser scanning (TLS) technology has been a hot topic in the field of building reconstruction. There are many ways to realize the fusion of the two kind data. In this paper, we propose a method for 3D-2D data registration based on Scale Invariant Feature Transform (SIFT) algorithm and range intensity data. 3D terrestrial laser scanner and digital camera are different sensors, which will lead to large difference between intensity image (derived from range intensity data) and color image. The traditional image matching method can not apply to register these kind images. This paper focuses on studying the feasibility and practicability of SIFT algorithm on such different images matching. The result shows that the principal of SIFT method is suitable for the registration of the two kind images.
Research on Vegetation and Soil Comprehensive Evaluation over Chuxiong Prefecture from TM Imagery
Authors: Xi Wu Jun , He Ping , Luo Ren Bo
Published: September 2014

The paper evaluated vegetation and soil comprehensively over Chuxiong Prefecture from TM Imagery on February 19th, 2003. The results showed that the vegetation and soil environment in Chuxiong prefecture was medium, the excellent land ratio in Dayao county was the largest among them, poor land ratio in Yuanmou county was the largest. Adding excellent and good land ratio up and sort them from large to small, the sequence were Shuangbai county(56.18%),Chuxiong city(54.57%), Lufen county(52.38%), Dayao county(51.21%), Yaoan county(50.33%), Nanhua county(46.53%), Wuding county(41.83%), Mouding county(39.92), Yongren county(39.41%), Yuanmou county(11.81%).
Resurvey and Analysis of GPS Horizontal Network for WZ Bridge
Authors: Li Cheng , Xu Xi
Published: September 2014

This paper discusses the resurvey conditions of the GPS horizontal network for WZ Bridge in Wanzhou District, Chongqing City, China. Through the adjustment of the observation data, this paper shows that using the short side as the lofting directed edge in high-precision lofting should be avoided. Further, resurvey results show that the control network accuracy can meet standard requirements. The control network can be used for precision measurement in the anti-collision facilities installation engineering of WZ Bridge, and can also be a reference for other engineering control networks in mountainous river areas.
Using GPS to Monitor the Deformation of Landslides
Authors: Zeng Huai En , Ge Kui , Yi Qing Lin
Published: September 2014

GPS is the most prevalent technology to monitor the surface deformation of landslide. The paper mainly intends to solve two critical issues of GPS data procedure. One is the inconsistent issue of control points, which may leads to a distorted monitoring network and wrong deformation value. The inconsistent control points can be detected by comparison of precise GPS baseline solution and known baseline length. Another one is the issue of bad approximate position in RINEX O file, which may cause the no solution of baseline. The paper presents an approach to amend the approximate position by the priori information. A numerical case is illustrated to validate the approaches.
“Upward” Design: From Gothic Architecture to Skyscraper
Authors: Liu Cong Ru , Lin Ming Sen , Yao Mi La
Published: September 2014

The pursuit of human being in “upward” architecture goes back to establishment of the gothic church, experiences development of the Chicago School and finally realizes popularization of the international style. Nowadays, the skyscraper has achieved an incredible height, and the techniques of architectural design are diversified just like a hundred flowers in bloom. Nevertheless, the design philosophy of conformity of interior and exterior and unity of form and spirit established by the predecessors at first is still worthy of inheritance.
A Preliminary Exploration on Digitization Analysis for Spatial Form of Ancient City Wall in Southeast of China Based on Multivariate Analysis
Authors: He Ke , Wang Cheng Kang
Published: September 2014

The harmonious development of ancient city walls in China and their surrounding spatial forms faces a very complicated situation. In this study, the multivariate analysis method is used to coordinate, summarize and analyze the complicated influencing factors for objective data support, providing the objective reference and theoretical pattern to the reasonable protection and sustainable development for ancient city wall and its surrounding space. As a preliminary exploration of the study, this paper aims to establish the overall study framework.