bluuebunny/crossref_metadata_2025 huggingface dataset:
Ecological Integration of New Ideas for Urban Tourism Space Resources — Nanning Watertown Tourism Space Resources Integration
Authors: Huang Yao Zhi , Chen Chao Jun
Published: October 2011

Nanning proposed to create "water city with Chinese characteristics” in 2009, so how to use its unique Subtropical landscape resources, integrating Nanning tourism space for promoting tourism feature and culture, which is main task of Nanning. This article will utilize landscape ecology tourism to study Nanning city, the city tourism landscape space could be analyzed by during such process, Nanning Watertown tourism development will enter new stage, water is axis, along the tourism resources and landscape could be analyzed and systematical connected for forming Eco-tourism network, which can provide reference and guidance for Nanning tourism space resources integration.
Study on Numerical Inversion of Concrete Temperature Field with Cooling Pipe
Authors: Chen Shou Kai , Zhang Wei Wei
Published: October 2011

The accuracy of thermal parameters, which are one of the important conditions to study the problem of temperature control and crack prevention of concrete, directly influence the calculation of concrete temperature and stress field. Based on basic genetic algorithm, the FORTRAN procedure was programmed after improving its defects. According to a project, the temperature test was carried out in one of sections of a prototype concrete structure, and the measured temperature dates were obtained. Based on the improved genetic algorithm and the measured temperature dates, the thermal parameters of concrete were obtained after back analysis, and the calculated and measured values were compared. The results show that the improved genetic algorithm provides a effective way for back analysis of concrete temperature field.
Buildings on the Slope Considering Effects of Uneven Settlement of Single Pile on the Structure Research
Authors: Wu Li Ming , Wang Zi Jian
Published: October 2011

Buildings built on the slope and slope, in order to avoid a lot of digging embankment. According to the slope of potential changes in pile foundation of General unequal height. In the design of such buildings are generally the superstructure and Foundation when considered separately, under normal load bearing capacity and deformation is to meet to coordinal requirements.Changes in water level cause of slope sliding, so lead to individual settlement, the class meets the deformation of the structure of coordination of the Department of architecture and how the force is not known. Based on this, to a shore in 8 layers of pile foundation in the framework, for example, using finite element analysis software ANSYS in different parts of a single settlement on the basis of structural impact.
In Situ Inspection of Ultra Durable Concrete Using Electrical Resistivity Technique
Authors: Lim Tze Yang Darren , Sabet Divsholi Bahador , Teng Susanto
Published: October 2011

In today’s rapid construction, a reliable method for quick evaluation of concrete quality during construction is very important. The compressive strength of concrete has been used to evaluate the mechanical properties of concrete; however compressive strength may not represent the durability of concrete. Rapid Chloride Migration Test (RCMT) and electrical resistivity can be used to evaluate the durability of concrete. Obtaining the coefficient of chloride diffusivity from RCMT usually requires a testing duration of 24 hours or less for normal strength concrete. With the inclusion of supplementary cementitious materials and lower water/cementitious ratio to achieve a higher strength and more durable concrete, testing of the concrete becomes an elaborate affair which might takes at least four to five days of testing. Electrical resistivity technique has been used to evaluate the quality of normal strength concrete. However the suggested classification of concrete quality is not applicable to ultra durable concrete. In this work, the effectiveness of using the concrete resistivity test results from electrical resistivity technique is studied. With the use of direct and four points Wenner probe methods, the concrete resistivity results were obtained and compared with the coefficient of chloride diffusivity from RCMT. Six mixes of three different grades with the inclusion of 30% granulated ground blast-furnace slag and 10% undensified silica fume were designed and tested; and high correlation coefficients (>0.94) for all the mixes were achieved. This represents the effectiveness of using the electrical resistivity technique to carry out fast and accurate in-situ test to determine the quality of the ultra durable concrete.
Restoration Design and Calculation of Shaft Joint in Complex Stratum
Authors: Han Xu , Ren Yan Long , Xia Yang
Published: October 2011

On account of the fracture status of shaft joint in complex stratum, we analyze the reasons causing damage, then put forward restoration plans, such as, controlling water and consolidate the weak stratum by grouting, and strengthen the shaft supporting. We also propose to enhance supporting shaft thickness reasonably through shaft calculation, checking, and numerical simulation. In addition, bolting support with metal mesh and cable system should be adopted in the combined support of weak surrounding rock, double bolt plates should be used to enhance the links between shaft and surrounding rock, and the support effect should also be monitored.
Finite Element Analysis for Effect of Initial Load on Dynamic Characteristic of Beams
Authors: Zhang Jia Wei , Yang Zhi Guo , Wu Ya Ping , Zhou Shi Jun , Zhao Jian Chang
Published: October 2011

Based on nonlinear elastic theory and Hamilton’s principle, a generalized element stiffness matrix, which incorporates the effects of flexural as well as axial stresses induced by initial load, is given. A finite element method for dynamic analysis considering the effect of initial load is presented, with corresponding computer programs produced to facilitate the analysis. The formula is validated through a comparison in results with the analytical solution. The effects of key physical factors, including the type and magnitude of initial load, and stiffness parameters such as sectional inertia moment, inertia radius and span, on the dynamic characteristics of the beams with various restraint conditions are discussed with the effect of initial flexural stress considered. The results suggest that the natural frequency of the beam would be enhanced due to the existence of flexural stress induced by initial load and such as effect relates to the magnitude of initial load and stiffness parameters of the beam.
Study of BP Network for a Cylinder Shell’s Support Identification
Authors: Luo Yao Zhi , Tong Ruo Fei
Published: October 2011

Some key technologies of neural network for structural damage identification, such as structural design of BP network, input parameter forms, training methods, learning rules and so on, are discussed. Modal parameters of a cylindrical shell structure under different support conditions are tested. Then these data are used as training samples for BP network, and depending on whether using random error, two different BP network is trained. Performance of these trained BP network in different case of test error is studied. The results show that adding a random error to the training samples can effectively improve the recognition ability of a BP network.
Analysis of Different Treatment Measures for Karst Caves of Aikou Pitch Core-Walled Rock-Fill Dam Base
Authors: Yang Yong Tao , Zhang Jian Hai , Zhang Zhi Xiong , Xiang Qing Wei
Published: October 2011

Karst caves are found in the bedrock of Aikou pitch core-walled rock-fill dam, of which the volumes of K6 and K5 all exceed 105m3. Due to K6 is within the stress influence range of the right abutment, it has significant effect to the right abutment compression deformation, dam stability and core stress. Three stress deformation study cases(none replacement, partial replacement, complete replacement of K6) are simulated by using 3D finite element method. The result showes that to ensure the compliance of dam deformation and avoid adverse stress occurred due to differential deformation, K6 should be replaced as completely as possible
Research on Wireless Remote Monitoring System of the Durability for Large Concrete Structures
Authors: Xu Shuo , Yu Jun Qi , Niu Di Tao , Dong Zhen Ping , Gao Pan Xiang
Published: October 2011

A wireless remote monitoring sensor network for durability of large concrete structures is designed and studied in the case that traditional parameters monitoring and durability evaluation methods are willing to promote to meet modern requirements. As traditional monitoring methods of concrete structure focus on the structural parameters while missed the research on durability of the structures, a Internet of Things (IOT) system of durability monitoring is designed to optimize and develop. By deploy sensor nodes for durability monitoring system based on ZigBee wireless network and GPRS remote data transmission, the durability sensor data collected can be send to the monitoring and evaluation computer information system based on data fusion to finish intelligent analysis, evaluation and early warning. In this way, the system conquered the problems that high maintenance cost, early deterioration of structural performance and shorten useful life, contributed to the structural safety of large-scale concrete works and take action to maintain normal operations in time. This meets the requirements of China's economic sustainable development, so it has important social significance and economic values.
Study on Bearing Capacity of Beams Strengthened with Section Enlargement Method Considering Secondary Loading Process
Authors: Liu Si Meng , Sun Ma , Liu Qing Yang
Published: October 2011

Bridges are the key components of civil infrastructure. Since decades ago, bridge strengthening and rehabilitation have become popular and their wider applications would be needed in the future. Although much research was carried in this field, some important problems including bearing capacity of reinforced beams didn’t form concordant views in this community. To research influence on bearing capacity of reinforced RC beams, we analyzed the loading process of RC reinforced beams from the beam-loaded-only stage to that of co-working of compound beams (including original beams and their strengthening layers), developed non-linear FEM program to simulate that loading progress, and finally validated the results with data from reference. This paper presents the theoretical analysis, and compares data yielded by program with those of experiment. We found that for adequate reinforcement beam the influence of secondary loading on the ultimate bearing capacity of reinforced beams is very limited. Our finding was confirmed by the experiment and FEM program.
Applications of Fiber Bragg Grating in Strain Measurement of Concrete Bridge
Authors: Tang Xian Xi , Tang Xian Zhou , Xu Yue , Guo Wei
Published: October 2011

In order to verify the role of fiber bragg grating strain gauge in strain measurement of concrete bridge, and the influence of concrete and steel strain properties by fatigue loading, the relevant experimental researches were carried out. The results indicated that the Fiber Bragg grating strain gauge could reflect the strain regularity of concrete and steel well; for the fiber grating strain rosettes inside the concrete, the pasting equipments of fiber gratings had a certain impact of the measurement effect. The fatigue loading had a certain impact of the properties of concrete and steel, in conditions of the same number of fatigue, the greater the stress amplitude the more obvious the effects. The results analysis shown that, fiber grating strain measurement innovated the means and methods of strain measurement in detailed structure of the concrete bridge, for the strain measurements of concrete bridge under fatigue loading, the FBG could still play very good effect.
Research on Design Reference Period and Structural Design Method
Authors: He Jia Nian , Wang Zhan
Published: October 2011

In structure design, for expressions with partial safety factors, partial safety factors and nominal value of loads are calculated based on the presupposition that the design reference period is 50 years. When the design reference period is not 50 years, it would cause unclear reliability of building structure by using expressions with partial safety factors following correlative codes yet. It may lead to hidden dangers in that way. In order to derive expressions with partial safety factors suitable for any design reference period, two useful methods are shown in this paper, modification of partial safety factors and modification of importance factor of structures. From results of analysis, we get the conclusions that it can assure the reliability index of the expression using the method of modification of partial safety factors, and the method of modification of importance factor of structures is very simple, but cannot assure the reliability index of the expression.
Experimental Study on Flexural of RC Beams Strengthened with Basaltic Fiber Sheets
Authors: Zhao Shi Yong , Wang Tie Cheng , Li Zhan Wen , Bian Zhi Hui
Published: October 2011

The bending performance test on one ordinary reinforced concrete beam and six RC beams strengthened with basalt fiber sheets(BFRP) is carried out, and the bending performance of the RC beams strengthened with BFRP is analyzed. The experimental results show that BFRP improves the bending performance of the beam. Pasting one layer,two layers or three layers of BFRP, The ultimate strength RC beams were increased by 29%, 56% and 78%. Basalt fiber sheets and concrete beams can work better together and play an effective role in reinforcement.
Experimental Studies on Seepage Failure of the Top Stratum at a Weak Spot in Double-Layer Dike Foundations
Authors: Zhou Hong Xing , Cao Hong , Zhang Wu
Published: October 2011

Flood-induced piping and subsequent formation of sand boils can cause severe damage to river levees. And it is known that no piping failure occurs, without seepage exit. The paper represents an experimental study on the process and mechanism of seepage exit forming on top stratum at a weak zone in a double-layer dike foundation, using sandbox modeling. According to the practical observation, three series experiments were designed. The size, thickness and the physical and mechanical properties of the top stratum are considered. The results show that the failure mode is close related to the size of the weak zone. And the hydraulic gradient of seepage exit forming is greater than the value, computed by Terzaghi’s formula.
Modal Decomposition Solution of Lamb Wave Scattering at Step-Like Discontinuity
Authors: Feng Fei Long , Liu Yan
Published: October 2011

Modal decomposition method is utilized to investigate Lamb wave scattering at step-like discontinuity. The structure is regard as a special delamination structure where one or two delamination layers are missing and only one delamination layer extended to infinite. Model decomposition technique is then combined with the boundary condition equations to get the scattering solution of the whole discontinuity region. The efficacy of the method is illustrated by calculation examples where the scattering of the second symmetric mode at step-discontinuity with different thickness are evaluated and Energy flux conservation is confirmed.
Influence of Water Repellent Treatment on Corrosion of Steel in Concrete with Chloride Ingress
Authors: Ren Zhao Jun
Published: October 2011

Abstract. Corrosion of steel due to chloride ingress is a worldwide problem in reinforced concrete. In order to control such chloride-induced corrosion and evaluate the effectiveness of silane water repellent surface treatment on steel corrosion in concretes with different chloride ingress, two series of reinforced concrete specimens were used to investigate experimentally. In the first series, concrete was applied permanent migrating chloride from a reservoir of 3% NaCl solution which was placed on the top surface of each specimen. For comparison, the same concrete was made with silane water repellenet treatment correspondly. Tests were taken with half-cell potential and polarization resistance methods. Results show that steels in concrete without water repellent treatment have more negative half cell potential, higher mass loss ratio and bigger corrosion current density, and the effect of improvement through silane liquid surface treatment is evident. In the second series,concrete was same to the first one, but for wetting and drying cycle chloride ingress. Results indict that corrosion potentials decreased in negative little and later keep stable in the beginning period after water repellent treatment. Relatively for specimens without treatment, the value of corrosion negative corrosion potentials and corrosion current densities increase all the time.
Research on the Bending Bearing Capacity of Old RC Beam Reinforced with CFRP Sheet
Authors: Wang Ru Heng , Cheng Jin
Published: October 2011

Adequately consider the mechanisim of concrete and steel of the beam after perish, this paper preclude the bending bearing capacity function of the old RC beam reinforced with CFRP sheet. The experiment which proposed on 4 beams which have been used over 40 years in Mianyang get the result that it is match the function. This paper also analyse the fracture morphology of the reinforced beam and the effective of the reinforcement. The conclusion this paper have aquire is that the old beam which reinforce with CFRP sheet can satisfy the engeneering.
Study on the Behaviors of Steel Reinforced Concrete Cloumns
Authors: Yang Bao Sheng , Li Yun Yun
Published: October 2011

The influence on columns behaviors of slenderness ratio are analyzed, and the influence on columns’ anti-seismic behavior of axial compression ratio, stirrup ratio and steel form are analyzed through the test on bearing capacity and level load of low cycle reverse of steel reinforced high-strength concrete columns. The bearing capacity of the long columns reduces along with the slenderness ratio increasing and augments along with concrete strength increasing. Probability of suddenly destruct increases along with the column slenderness ratio augmenting through the test. In addition, anti-seismic behavior of columns are effected not only axial compression ratio, but also steel form. Axial compression coefficien of the steel reinforced high-strength concrete columns with different steel form may be adjusted, however, the influence of stirrup ratio is very little on anti-seismic behavior of columns.
Optimal Design of Foundation Pit Dewatering Based on Objective Functions and Numerical Analysis
Authors: Xu Yan , Yan Yan Yan
Published: October 2011

Based on optimal designed objective function method, on the constraint condition of control point level and the objective function of the least total yield, optimal analysis of well-group precipitation design to the subway section has been done, and some targets have been gotten, such as the total yield, precipitation sphere of influence, reasonable arrangement of dewatering well and single-well water yield. At the same time assign for the single-well yield using COMSOL Multiphysics, and then simulate and evaluate the precipitation effect, predict the sphere of influence to surroundings caused by engineering dewatering and also the settlement regularity of the soil. It turns out that the combination of the above two methods can solve the optimal precipitation well to reach a better effect, reduce the cost and affect less environment.
Coupled Numerical Analysis of Tunnel Excavation in Saturated Soft Clay under High Groundwater
Authors: Yuan Hua , Wan Hai Tao , Zhao Zhi Liang
Published: October 2011

A coupled numerical simulation of a river-crossing shield tunnel excavation in saturated soft clay with high groundwater has been performed using a three-dimensional finite difference model, which takes into account variation of soil permeability with stress, anisotropy of permeability, reduction effect of joints on segment bending stiffness and the hardening process of synchronized grouting material. Groundwater seepage conditions around the tunnel, bending moment, axial forces and strength safety factor of tunnel segment as well as deep soil displacement during tunnel diving are investigated numerically. The analyses provide valuable information concerning the mechanical behavior of tunnel segment and hydrological field in soil around tunnel during advancing. The result also is benefited to control groundwater for river-crossing tunnel in soft clay under high water table.
Coupled Mechanical and Hydraulic Analysis of the Effect of a Front High Hydraulic Conductivity Zone on Shield Tunnelling
Authors: Song Jin Hu , Miao Lin Chang , Wang Fei
Published: October 2011

A localized high hydraulic conductivity zone with high water pressure is denoted as a hazardous zone. This study focuses on the 3D coupled mechanical and hydraulic analysis of the effect of a front hazardous zone on shield tunnelling. The tunnelling process is modelled by a step-by-step excavation. And a series of three-dimensional coupled mechanical and hydraulic analysis are performed to estimate the distribution of the TSR of the ground ahead of the tunnel face. The result show that the tunnelling directly influences on the distribution of the pore water pressure and the TSR. The maximum influence range of the hazardous zone on the face stability is within 4 times the R value. And the high water pressure can induce a failure of the ground at the tunnel face by itself in conjunction with a poor ground condition.
Experimental Study on Compaction Characteristics of High Liquid Limit Clay of the Yellow River Alluvial Plain and its Subgrades Filling Technology
Authors: Yang Hong Xia
Published: October 2011

Based on the geologic exploration materials and indoor test of Ji-He expressway,analysed the compaction characteristics of high liquid limit clay of the Yellow River alluvial plain,the relationship among compaction work and moisture content and dry unit weight,and the changing rules of the CBR value in different compaction works with the change of moisture content.Demonstrated that high liquid limit clay of the Yellow River alluvial plain can be used in expressway subgrades filling. Moreover, through the experimental sections of subgrades filling,the reasonable construction technology and quality controlling measures is put forward, and provides reference of subgrades filling with high liquid limit clay of the Yellow River alluvial plain.
National Cultural Fusion and Green Building — the Study of some Old House in Nanning
Authors: Gu Yun Li
Published: October 2011

By the studying and comparing of some old house in Nanning, we find something same: they have simple structure, good ventilation, preventing over sun, homely decoration, and so. They are fit for their surroundings: sub-tropic, pan, river bank. they have something resemble with the houses of minority in Guangxi municipality. They can be used for reference to the building in county without air-condition. The attention and research of these buildings contributes much to the further promotion of green architecture in this region.template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.
Study on Mechanism of Migration and Outburst of Natural Gas in Tunnel
Authors: Zhu Bao Long
Published: October 2011

The mechanism of gas outburst, gas-solid coupled simulation by discrete element method and natural gas problems in the Yuanliangshan tunnel are studied. Petroleum gas and coal gas are produces in the karst region generally; gas outburst includes coal gas outburst and the petroleum gas outburst in the tunnel construction. Gas migration mechanism and mathematics model, including macroscopic and microcosmic mechanism, migration mathematics model, diffusion models, and gas-solid coupled discrete element method (DEM) numerical simulation of gas migration and mechanism of gas outburst are proposed. Based on the methods above-mentioned and monitoring data, some import problems are studied, such as natural gas storaging character in the entry of Yuanliangshan tunnel, forecast methods of natural gas, relation of natural gas and underground water, kinds of poisonous and harmful gas and its appraising, evaluation indexes of air quality in tunnel, etc.
Analysis Again for Earth Pressure Calculation Theory Considering Displacement Effects
Authors: Yang Tai Hua , He Huai Jian , Gong Xiang Chao
Published: October 2011

According to Moore-Coulomb strength theory, combined with the shear strength reduction method, assumed that the exerted value of the soil’s internal friction Angle and displacement were in nonlinear, and the exerted value of the soil’s cohesion and displacement were in linear, and then put forward a unified, continuous with displacement earth pressure calculation model, and this model could be used to calculate the active and passive earth pressure for cohesive soils and cohesionless soils in any nonlimited state and any movement mode. Through the analysis of the calculation model showed that: (1) The above assumptions were all reasonable from the two perspectives of the theoretical and the measuring; (2) The variation process of earth pressure acted on the retaining wall with displacement, could regard as the process of the soil’s shear strength parameters exerting gradually; (3) Given the physical meanings to the calculated parameters; (4) Analyzed the characteristics of the calculation model, and pointed out that there were calculation errors when the displacement of retaining wall was in (0, x0H) for the Rankine earth pressure theory.
Test Methods of Soil Micro-Mesostructures
Authors: Hu Qi Zhi , Shuai Fei , Tao Gao Liang , Zhou Yi Peng
Published: October 2011

The reasons of the soil mechanical behavior shown are the property of their internal microstructure changes in the external reflection, so with soil micro-mesostructures to analyze soil macroscopical mechanical properties is a good research method. The current concepts of common soil test methods are mainly CT technology, SEM technology, mercury intrusion technology and high-resolution camera technology. On the basis of elaborate all kinds of the test of fine view about the principles of test methods ,the principle of the steps and its characteristics ,and by comparison and analysis of the advantages and disadvantages of the test methods are given and the scope of various test methods to promote the study of the soil micro-mesostructures.
Experimental Study on Laterite Eroded by Alkaline Materials
Authors: Yang Hua Shu , Wei Hai , Yang Yu Lu , Li Jin Yu , Yin Xiao Lin
Published: October 2011

Laterite contacted with alkaline materials, was significantly corroded under same conditions, it to be found in the processes of dam safety identification. Alkaline materials properties and acid-alkali reaction were analysed, and supersaturation emulsion calcium hydroxide was used to immerse laterite at constant temperature. Then changes of ion concentration were detected in exudates, change trends of grain size gradations were analysed, and evolutions of pore were observed in laterite. Mechanism of laterite chronically eroded by alkaline materials is opened out, which is neglected by engineers and has become one of the main reasons why reinforcement benefit is always too low.
An Exploratory Study on Influence of Metro Works on Adjacent Tree Growth
Authors: Zhuang Qian , Wang Guo Guang , Li Shao Wu
Published: October 2011

The necessity to carry out study of the influence of metro works on tree growth in their vicinity is explained in the present paper. A preliminary analysis of how various engineering measures in different construction methods influence the growing conditions of trees is conducted. It is pointed out that to reduce the influence of metro works on the growth of trees involves two knowledge aspects: the necessary conditions and basic requirements in the growth habit of trees and how the underground growing environment is changed by metro works. A research perspective is put forward, which is to adopt the combination of the mechanism analysis, physical model test and numerical simulation in the study of the influence of metro works on the underground growing environment of trees.
Analysis on Parameters in Duncan-Chang Constitutive Model
Authors: Zhang Bo
Published: October 2011

Duncan—Chang constitutive model is widely used for it reflecting the main property—nonlinearity of soil. In the paper, the geotechnical Duncan—Chang constitutive model is introduced into ANSYS software by using the User Programmable Features (UPFS) of ANSYS. The calculation results with eight parameters variation in Duncan—Chang model are analyzed, which has much wider reference value for geotechnical engineering problems. The relative solution methods provide important reference for other constitutive models to be introduced into and analyzed in ANSYS program.
Pile Foundation Analysis of Ground Motion Transfer Law
Authors: Liu Chun Yuan , Sun Dong Kun , Han Ming Feng
Published: October 2011

Based on shaking table model test, each response of the pipe models is obtained by inputting different types, amplitudes, frequencies of seismic waves and white noise excitation. The transfer function of the measuring point related to the vibration table, natural frequency of soil and pile, power spectrum and other parameters are obtained by Matlab programming model. By applicating SeismoSignal the propagation of seismic waves in the soil was gotten. Reveal the regulation of the propagation of the seismic waves in the pile-soil system. Investigate dynamic characteristics and dynamic response of the pile and soil in the earthquake and the transfer laws of the seismic wave energy. Provide a useful reference for the pile foundation seismic design.
Monitoring Analysis of the Underground Cavities in Guandi Hydropower Station during the Construction Period
Authors: Gao Chun Yu , Deng Jian Hui , Meng Fan Li
Published: October 2011

The underground cavities of the Guandi Hydropower Station comprise four pressure division tunnels, a generator chamber, a main transformer chamber, a tail water control chamber and two tail water tunnels and arrange in the basalt mountain on the right bank of the dam. Based on the brief introduction of cavity arrangement, geological conditions, monitoring design and execution, the deformation magnitude and deformation characteristics of the three major cavities are focused on analyzing. The stability of the cavities is evaluated. The quality of the surrounding rock masses of the underground cavities of the Guandi Hydropower Station is good and the deformation is normally less than 30mm. However, some parts have large deformation due to the influence of the structure surfaces and the maximum deformation is 61.49 mm. Most of the parts with larger deformation are the middle and upper positions of the side walls and rock anchor beam positions. The structure surfaces have noticeable action for controlling the surrounding rock mass deformation. The stability of the cavities is good.
Incremental Launching Construction Analysis of Continuous Skewed Bridge with Uniform Cross Section
Authors: Li Chuan Xi , Luo Zhi Xian , Li Jia Jun , Ou Jian Ren
Published: October 2011

The finite element formulation was used to analyze the influences of structural parameters such as the skewed angle and the stiffness ratio of flexure to torsion on the distributions of moment and torsion. The moment and torsion factors figure were presented according to the different structural parameters such as the skewed angle and the stiffness ratio of flexure to torsion. Some equivalent load vectors of non-nodal load acting on the skewed supported beam were derived.
Calculating Method of Active Earth Pressure behind Rigid Retaining Wall Based on Pseudo-Dynamic Theory
Authors: Wang Kui Hua , Wu Deng Hui , Ma Shao Jun , Wu Wen Bing
Published: October 2011

By means of pseudo-dynamic theory, a new calculating method is presented to calculate the pseudo-dynamic seismic active earth pressure behind rigid retaining wall. Considering time and phase difference within the backfills, the horizontal slices is used to analyze the distribution of seismic active force behind retaining wall in more realistic manner. Under the assumption that the soil backfills are rigid body, the equations derived in this paper can be degenerated to Mononobe-Okabe equations. Through numerical analysis, it is shown that the values of seismic active force obtained from present study are smaller than those obtained from Mononobe-Okabe theory and the distribution of seismic force along the depth of the wall is nonlinear. It is also found that the action point of the total seismic active earth pressure is higher than one third of the wall height, which is corresponding to previous experimental results.
Primary Research on Inheritance and Innovation of Hehuang Vernacular Residence in Qinghai
Authors: Jin Yi Bing , Wang Jun , Cui Wen He
Published: October 2011

“Zhuangkuo” is a unique type of residence in Qinghai. It is characterized by local materials, simple structure, and convenient construction. Also, it is adapted to the natural environment. Based on a field study, this paper addresses how to inherit the ecological wisdom of this type of residence construction. Firstly, find out differences of architectural characteristics under multi-cultural. Secondly, point out the four main problems of Hehuang residence building under the background of New Rural Construction. Thirdly, explore the ecological wisdom of “Zhuangkuo” residence construction. In addition, summarize construction countermeasures and principles for innovation of Hehuang residence; propose new residential design carrying forward Hehuang architectural culture. The purpose is to provide necessary guidance and reference for inheritance and innovation of Hehuang vernacular residence.
Simulation Analysis of Concrete Temperature and Stress of Plant Elbow Section of Sluice Dam
Authors: Chen Shou Kai , Guo Li Xia
Published: October 2011

In view of concrete structure of dam plant elbows section is complex and strong external constraints, the study of concrete temperature and stress during construction should be carried out by computer simulation. A case of plant elbow section of a sluice dam project is presented where the 3D FEM simulation of instability thermal field and stress field of the concrete structure is adopted after building the 3D finite element model, and the changes and distribution characteristics of temperature and stress during whole process of construction is obtained. The results show that, under the complex constraints condition, the concrete of plant elbow section has greater tensile stress, it can lead to structural cracking, and it is necessary to take appropriate temperature control measures.
Study on Bearing Capacity of Cylindraceous Double-Concrete Shaft Lining
Authors: Ren Yan Long
Published: October 2011

In this paper, elastic stress solution of cylindraceous double-concrete shaft lining was obtained by plane strain model. We derived the dimensionless formula of interface pressure of the double wall. So considering of that the concrete strength were largely improved under multiaxial compressed, we got the relationship between concrete strength increased coefficient of inner, outer shaft lining and geometry size, elastic-module, Poisson’s ratio of shaft lining by theoretical deriving, then the formulate of double-concrete shaft lining ultimate bearing capacity was proposed based on multiaxial strength criterion of concrete (G-W Failure Criteria) which advised by the existing design of concrete structure specification. All these provided a theoretical basis for rational calculating the ultimate bearing capacity of double-concrete composite shaft lining. The results were great significance for us to reduce the concrete design strength grade of shaft lining and project cost by using double-concrete composite shaft lining.
Mathematically Modeling for a Nautilus-Shaped Building
Authors: Zhang Peng Cheng , Gu Yu Xia , Zhao Shuang
Published: October 2011

Bionic shape provides inexhaustible creative inspirations for architects, however for building construction, which also brings new challenge to engineers. Because structural mechanics and construction implementation need accurate space orientation, dimension, and figuration, the exactly geometrical modeling is absolutely necessary. This paper presents the methods of mathematically modeling of bionic shapes with an example of a Conch shape Concert Hall in Xiamen in the design practice, and draw inferences to more complex shapes and structures for design reference.
The Erection Technology of Pile Foundation Construction Platform for the Sanmenkou Cross-Harbor Bridge
Authors: Li Dong Guo , Chen Jian Ping
Published: October 2011

The south gate bridge of the Sanmenkou cross-harbor bridge at Xiangshan County lied in the East China Sea coastal waters. The foudation for the bridge pier in the water used bored piles, the greatest depth up to 42m. This article described the Program selection, design and construction methods about the construction trestle and platform when the piles foundation were built in the water.
The Application Research of Reinforced Concrete Multi-Ribbed Hollow Composite Slab in the Road Slab Culvert
Authors: Zhao Dong Qi , Tang Yi Jun , Li Hui , Song Gui Feng , Guan Feng Ling
Published: October 2011

Reinforced concrete cover in the road culvert cover design, in order to facilitate the construction, usually using precast reinforced concrete solid slab, but the overall cost is not low. This article researched a reinforced concrete multi-ribbed hollow composite slab, it based on the theory of reinforced concrete multi-ribbed slab structures, using a precast reinforced concrete ribbed slab as the bottom die, then poured reinforced concrete beams and panels rib ,and them constituted a whole stack of reinforced concrete ribbed hollow slab. This kind of cover, compared with the precast reinforced concrete solid cover, is not only good mechanical properties, high integrity, but also saving concrete, steel, and bottom slab appeared smooth and fine, lower construction cost.
Research on Xi'an Real Estate Market and National Economy Based on Spectral Analysis
Authors: Tang Hua , Li Hui Min , Zhou Tao
Published: October 2011

Cycle fluctuations have been identified which includes real estate investment, real estate consumption, real estate industry and national economy. Spectral analysis is applied in such research based on the statistical data from 1997 to 2010 of Xi’an. The mutual relation could be found between investment and price of Xi’an real estate referring that investment increases with the rise in house prices. Furthermore, a great deal of randomness has been shown in Xi'an real estate consumption which does little effect on the cycle of real estate price indicating real estate market in Xi'an is a seller's market. At the same time, due to the fluctuation cycle of national economy in Xi’an is more than 12 years; the periodic fluctuations of national economy cannot be deduced from the periodic fluctuations of real estate in Xi’an.
The Research of Earth Pressure behind the Abutment of Integral Abutment Bridge in Uniform Temperature Difference
Authors: Yu Tian Lai , Wang Jia Jia , Tian Lei Lei , Hou Xian Bin
Published: October 2011

The earth pressure behind the abutment of integral abutment bridge was measured in practice. The distribution and variation laws of the earth pressure are analyzed in seasonal falling and rising temperature difference through the test data. At the same time, the mathematical model of the coefficient of passive earth pressure when temperature rising under different ratio of the superstructure deformation and the height of abutment is established. Based on the mathematical model, the calculation value of the earth pressure behind the abutment in rising temperature difference is mainly agreement with the measured value
The Contradictions Researches of Urban Housing Demolition with the Perspective of Interactive Justice Theory
Authors: Yang Mao Sheng , Zhang Lin
Published: October 2011

In order to deal with the striking booming process of urbanization in the situation of urban housing demolition expanding and its major contradictions, the interactive fair game theory model is used to solve these contradictions and presented some suggestion. By analyzing the existing contradictions of demolition, the leads interactive justice theory establishes the model to analyze the game among the Government, the demolition, the developers and the demolition, which finally comes to the conclusion of the contradictory solutions and supplies suggestions for the government and developers demolition work. What’s more, it’s helpful to build a harmonious and stable society.
Calculation and Analysis of Ecological Footprint on Cities of the Poyang Lake Ecological Economic Zone
Authors: Sai Yun Xiu , Cai Jian Guo , Li Hui Ming , Wang Wei Ran
Published: October 2011

Based on statistical yearbook data in Nanchang city, this paper applies a calculation mode of ecological footprint to conduct calculation and analysis on the ecological footprint, as well as bearing capacity of Nanchang city-the core city of Poyang Lake Ecological Economic Zone from the year 2005 to 2009. According to some research, the average ecological footprint of Nanchang city in recent five years is 1.974879hm2/cap, the average ecological bearing capacity is 0.224917hm2/cap, and the average ecological deficit is 1.749962hm2/cap.Regional eco-environment is in the condition of unsustainable development. This paper also makes an analysis on the intensity of ecological footprint and ecological efficiency in Nanchang city. By taking these as a foundation, this paper puts forward strategies and suggestion to reduce ecological deficit of Poyang Lake Ecological Economic Zone and achieve sustainable development in this zone.
The Subjects of Building Fire Risk Management and Analysis of their Correlation
Authors: Huang Ying , Li Hui Min , Yang Bo
Published: October 2011

In our country, Subjects of fire risk management are the public security fire department, the insurance company and the owner. This thesis analyzed the subjects of fire risk management and their correlation, used the Game theory on the Game relationships of the three subjects, focused on analyzing the cooperation Game relationship between the public security fire department and insurance company.
Cantilever Structures’ Environment Symbiosis Technologies in Mountainous Housings
Authors: Tang Jian
Published: October 2011

Fenghuang Miao minority’s housings have been clearly divided into two types in the previous series of researches, and it is one of the main theoretical basis of this paper. Furthermore there are recess entrance porches and overhanging eave spaces between interior and exterior spaces in Miao minority’s housings, and it is the Miao minority housings’ regional characteristic. The important characteristic is analyzed in this paper basing on past researches. The recess porches are low and deep in Type 1, and high and shallow in Type2. The recess porches and overhanging eaves were changed relatively, the recess porches got shallow and the eaves got deeper from Type 1 to Type 2. Through the analysis of the changing from the linear pattern to curve pattern cantilever beams and their characteristics, it is defined that the curve pattern cantilever beams are the effective and native characteristic constructions, which made the eaves get expansion.
Study on Source Locating Technology of Visible Fire Detection in Large Space Building
Authors: Ma Zong Fang , Wang Hui Qin , Zhao Dan Yang , Hu Yan , Luo Chan
Published: October 2011

Locating fire source position is a significant aspect of automatic fire detection since it plays an important role in extinguishing fire in large space building in a short time. On the basis of previous literatures of visible fire location detection through analyzing the features of fire images, binocular vision based fire source spatial location is proposed in accordance with the computer vision principle in this paper. The binocular vision location algorithm is employed to identify the fire source position. To reach this, three typical spatial positions of fire source are measured in terms of camera scanning firstly; Secondly, confidence coefficients are added into the measured data to obtain the accurate position of fire source. Finally, the amount of water in cannon is adjusted to the right direction to put out the fire.
Researches on the Space Network Analysis and Optimize of Urban Commercial Pedestrian Space — Take Xi'an Shu-Yuan-Men Commercial Pedestrian Space as an Example
Authors: Li Xiao Long , Zheng Wu Kui , Wei Peng , Li Yang
Published: October 2011

This paper mainly discussed the relation between human behave and space configuration, in order to analysis and optimize the space of urban commercial pedestrian street. In this paper, Xi'an Shu-Yuan-Men commercial pedestrian space has been chosen as a case study. Firstly, a model has been built by using space syntax on the basis of the space network, and an analysis and optimization has been offered from the technical level. Secondly, combined with space network, by recording and analysis of the human behavior, a feedback has been offered to the model according to the actual needs. At last, a final comprehensive optimization plan has been carried out. The purpose of this plan is trying to improve the shopping and leisure environment of the mall and comprehensive Land use efficiency.
Architectural Historical Context Continuation and Modern Architecture Self-Realization
Authors: Tang Xi Ya
Published: October 2011

This paper use the design of Suzhou Museum as a example,study the cultural value of modern architecture "suzhou museum" and discuss several design strategies of continuing historical context from the aspects of history, culture and environment. Meanwhile, From the angle of architecture, we discuss how to inherit Chinese architectural context and realize self-innovation of Chinese modern architecture under the background of internationalization.
Experimental Research on Tensile Strength of Specified Density Steel Fiber Concrete
Authors: Zhang Yan Kun , Li Xiao Hu , Zhang Pan
Published: October 2011

Based on the experiment, the splitting tensile strength and axial tensile strength of specified density steel fiber concrete are studied. The influence of type of steel fiber, volume content of the fiber and substitution ratio of lightweight aggregate is analyzed. The relationship between splitting tensile strength and axial tensile strength of specified density steel fiber concrete is suggested.
Architecture Design for Context — Case Study of Jincheng Vocational Technical College
Authors: Wu Feng , Yang Jian , Cai Zhong Yuan
Published: October 2011

Carrying on the context is an important method of Architecture design. By analyzing the Huangcheng xiangfu castle (special cultural historical relics) on which the branch of Jincheng vocational technical college rely, this thesis deeply excavated the context in this region, and made the context play a role in space construction and the form of architecture. With this, the thesis also discussed the carrying on the context of architecture’s application and attempt in concrete design.