bluuebunny/crossref_metadata_2025 huggingface dataset:
Application Analysis of BIM in China Zun Foundation Project
Authors: Zhou Rui Ming
Published: January 2014

Nowadays, Building Information Modeling (BIM) is world widely used in the construction industry. This paper, based on the foundation of China Zun construction project, studies the value of BIM technology in collision detection, engineering statistics, and 4D construction simulation and analyzes its advantages of applying BIM technology and disadvantages exited in BIM software in practice.
Customs Risk Management Based on Outlier Data Mining
Authors: Liu Chang Wei , Zhang Xin Hong , Duan Jing Hui , Huang Bing Zhi
Published: January 2014

By using outlier data mining, this paper studied customs risk management in China. Our research contents are summarized as follows: First, we study the status of Customs risk management and we study other scholars’ research of the outlier data mining. Second, we introduce index of outliers and we use outlier data mining to establish a risk estimation model. Finally, we test the affectivity of this model by empirical analysis.
The Occupational Health and Safety Management of Workers in Building Construction Site
Authors: Zhao Xiang Dong
Published: January 2014

The work of occupational health and safety about construction industry has increasingly aroused peoples' attention ,so this article puts forward the problems existing in the occupational health and safety management of construction industry as well as the countermeasures and suggestions through the analysis of the construction labours' common occupational injury accident of the present stage in our country and the status quo in the aspects of professional physical,mental health and safety ,which is to develop the workers' way of life on safety,civilization and health.
Limit Analysis of Slopes Reinforced with Multi-Directional Anchors
Authors: Nian Ting Kai , Liu Kai , Zhang Yan Jun , Wang Dong
Published: January 2014

The upper-bound method of limit analysis combined with strength reduction technique is employed to analyze the stability of an earth slope reinforced with multi-directional anchors. A homogeneous and isotropic earth slope reinforced with two rows of anchors is considered. Attempts are made to obtain the optimal angles of anchors. Parametric studies show that, for homogeneous and isotropic slopes, the optimal angle of the first row of anchors is 0°; while the optimal angle of the second row of anchors varies with anchor positions, and generally is less than 15°.
Safety Accident Aanalysis of Ultra-High or Long-Span Formwork Support System
Authors: Zhuang Jin Ping , Cai Xue Feng , Tuo Ming Bei , Wu Jian Liang
Published: January 2014

With the economy development, ultra-high or long-span structures in engineering are increasing, but the collapse accidents of their formwork support system in the construction are also gradually increasing. The mechanical characteristics of ultra-high or long-span structure formwork support system were analyzed including eccentric loading effect, pole docking effect, horizontal load effect. Based on the mechanical characteristics and occurred collapse accidents analysis, the collapse reasons including design theory, construction management and material defects were analyzed in this paper.
An Analysis of the Influence of Rate of Variability for Tender Sum
Authors: Zhang Yong Gang , Wang Yong Hong , Zhao Yuan Yuan
Published: January 2014

A new concept has been put forward in the code of bills of quantities and valuation for construction works 2013, that is rate of variability for tender sum (RVFTS). This paper concentrates on the conception of the rate through the code and explores the application in combine with a practical project. Then a discussion about the influences of the bills of quantities (BQ) for tendering, the tender sum limit and the bid price is present. Finally, a conclusion can be extracted that the rate actually protects the employers benefit and makes the contractor in a disadvantageous position.
Experimental Testing of Fiberconcrete Foundation Slab Model
Authors: Buchta Vojtěch , Mynarčík Petr
Published: January 2014

Experimental measurements described in this paper are a continuation of research focused on interaction of foundation concrete structures and subsoil. This problematic has been researching on the Faculty of Civil Engineering VSB - Technical University of Ostrava for long time. Is it one of the main research directions at the Department of Constructions. In 2013, the research was focused on the analysis of fiberconcrete foundation structures. Especially, It was tested a foundation slab model of the National Supercomputing Center IT4 Innovations. This significant construction is realized in campus of VŠB - Technical University of Ostrava right now. It was a big opportunity to compare a model test results with measurements from real construction.
Study on Subgrade Construction Technology in Plateau Regions
Authors: Ge Bao Jin , Hou Rong Guo , Liu Sheng Chuan
Published: January 2014

Geology in plateau regions is complicated, season changing have great influence on subgrade filling, it is difficult to fill the subgrade. This paper is based on the project of S308 in Qinghai. According to the study on construction scheme, control standards, laboratory experiment and test in-suit, this paper gives the conclusions about subgrade construction technology in plateau regions, which can direct the project construction relevant.
Loess Joints Development Characteristics and Space Partition
Authors: Tang Dong Qi , Yao Xiu Fang , Peng Jian Bing
Published: January 2014

The extensive development vertical joints is one of the major features in the loess region. The joint destroyed the loess slope integrity, reduces the slope stability. First of all, through the field investigation and analysis the loess joint development characteristics, joint with slope tendency towards a big angle oblique, joints control slope trend. Secondly, according to the different regional slope stress analysis, tableland soil area is mainly by collapsibility tension, soil in the slope zone mainly by horizontal thrust produced by unloading effect, the slope area joint development is divided into collapsibility joint development zone, tension joint development zone, compression joint development zone and the excavation unloading joint development zone.
The Mineralization Age of the Gupao Gold Deposit, Guangxi
Authors: Zhang Zhi Wu , Li Hui , Yu Bin , Zhou Shang Guo
Published: January 2014

The Dayaoshan, which has nearly 200 gold deposits (or mineralization points), is one of the most important gold deposits distribution areas in Guangxi, and the Gupao gold deposit is an important representative one. Previous researches have carried out numerous works there to guide the gold prospecting work. Due to multiple episodes of gold mineralization and multiple sources materials in ore-forming, there are heated debates on the era of the mine, and the main mineralization age of the Gupao gold deposit is focused on the Caledonian or Early Yanshanian. According to the distribution characteristics of the gold ore body showing in the Zhilong, Gulinao, and Dawangding gold deposit, the discussion of macro-tectonic setting of the area, as well as the comparative study of surrounding gold deposits, we conclude that the main mineralization age of the Dawangding gold deposit is Early Yanshanian, and the main mineralization may be controlled by the nearly east-west trending fold which was caused by the north-south extrusion.
Analysis of Foundation Pit Accidents due to Expansive Soil in Hefei District
Authors: Zhang Gong , Wu Dao Xiang
Published: January 2014

Expansive soil has the characteristics of strong swell-shrink, developing fissures and over consolidation. This kind of soil soaking into water, which leads to its volume expansion, strength reduction but compressibility decreasing make its engineering geology properties worsen. The distribution of expansive soil in Hefei is very wide, there are more pit accidents in Hefei district in recent years. Causing the accident is mainly due to the ignorance of the characteristics and damage of expansive soil. According to many years engaged in related working experience, this paper analyses two common types of damage in foundation pit accidents. Finally, throughout the analysis of several accidents, corresponding prevention measures and construction improvement scheme have been put forward.
Analysis on Characteristics of Clay Minerals of Ultra-Low Permeability Sandstone Reservoir and Potential Damage to Reservoir
Authors: Lin Dan , Liao Ji Jia , Liao Ming Guang , Liao Ji Hao
Published: January 2014

By X-ray diffraction analysis, scanning electron microscopy and other research methods, this paper detailedly analysizes types and micro-characteristics of clay minerals in the Ordos Basin, Chang 8 formation of Xifeng Oilfield. Studies suggest that clay minerals mainly include petal-like and pompon chlorite, bridge-like and curved sheet illite, page-like kaolinite. The content of illite / smectite interstratified minerals is less. Different kinds of clay minerals can lead to different kinds of reservoir damage. The chlorite mainly causes acid sensitivity. The illite and kaolinite are the main source of speed-sensitivity damage. The illite / smectite interstratified minerals could easily lead to water-sensitivity damage. Through the above studies, this paper can provide foundation of geological basis for rational development.
Research on Physical-Mechanical Property of Reshaped Loess Contaminated by Acid
Authors: Yuan Jun Hong , Xu Xiang Tian , Zhang Guan Hong
Published: January 2014

With the rapid development of process of industrialization in Inner Mongolia, the environmental pollution, such as phenomenon of regional acid rain is gradually increasing. The Quaternary loess spread widely in Inner Mongolia. The ecological environment must be affected the intrusion acid rain. Meanwhile the physical-mechanical properties of original loess also are significantly influenced by the acid rain. To investigate the influence of acid rain on the physical-mechanical properties of loess, a series of triaxial tests in laboratory are carried out. The results showed that changes of PH value has significant effect on the specific gravity of soil grain, the limit moisture content , maximum dry density, and strength characteristics of loess.
Estimation Method of Rockmass Strength Parameters Based on Hoek-Brown Criterion
Authors: Zhong Chun Hui , Yang Zhi Jun
Published: January 2014

The strength parameters of jointed rockmass is estimated by Hoek-Brown criterion based on Geological Strength Index (GSI).The estimation process is demonstrated by an example , the study shows that it is an economic, practical, and efficient method to estimate the rockmass strength parameters .
Stability Analysis of Steep Bedding Rock Slope with Strength Reduction Method
Authors: Bu Lin , Xu Tao , Zhang Yun Jie , Xu Qiang
Published: January 2014

Stability analysis of steep rock bedding slope with weak structure planes using strength reduction method was simulated in this paper. The post processing function can display the development condition of the plastic zone, which is the criterion for instability of the slope. Analysis with working conditions of natural circumstance, after excavation, and the slope reinforced by anchor shank after excavation were put forward. Failure modes and safety coefficients of the slope proved that weak plane is the main factor controlling slope failure. Simulation results shown that strength reduction method is appropriate in predict the shape and position of the potential failure surface of steep rock bedding slope.
Model Tests of Strip Foundation with FRP Reinforced Sand Grounds
Authors: Bai Chong Xi , Fu Qiang
Published: January 2014

Fiber reinforced polymer (FRP) materials have good performance such as high strength, high modulus, corrosive resistance, and so on. FRP materials can be used to reinforced reinforcement effects significantly and improve durability of traditional reinforcements. A series of model tests were conducted on foundations reinforced with horizontal FRP reinforcemens. The influence of reinforcement modes on bearing capacity, settlement, strain of FRP and earth pressure were analyzed. From the test results, it was shown that the FRP reinforcement can significantly increase the bearing capacity and reduce the settlement, especially for double-layer reinforcement. And the effects of the anchoring inclusions were little, as compared with the reinforcements.
Study on Compression Resistance under Different Confining Pressures and Parameters of Cam-Clay Model of Bentonite
Authors: Hou Jun Jie , Qiao Lan , Cai Qing Chi , Li Zhen
Published: January 2014

Factors such as density and confining pressure effect on the compressive strength were analyzed by comparing the experimental results under different conditions, the parameters of Cambridge model were worked out with the data from consolidation test.
Study on Proportioning of Similar Material to Swelling Rock
Authors: Diao Xin Hong , Wang Kai , Fu Ping Yong
Published: January 2014

Using fine sand as aggregate, bentonite, gypsum and cement as cementing materials, wood powder as admixture, through two stage proportioning tests for similar material to swelling rock, the similar material displaying expansive properties of swelling rock is obtained. Physical and mechanical performance experiment indicates that the similar material could meet swelling characteristics and other physical and mechanical requirement of swelling rock, which could be used in similar material model test for swelling rock.
Experimental Study on Compressive Property of New Concrete Block Masonry with Multi-Row Cores
Authors: Cui Zhao Yan , Liu Fu Sheng , Zhang Shun Ke
Published: January 2014

With the development of energy-saving in buildings, new energy-saving block masonry with multi-row cores is commonly used. In this paper, from the study of typical bearing capacity of multi hole concrete block masonry of combining multiple rows of holes, holes in the multi block wall masonry capacity test of heat insulation material characteristics. Test results show that, in the process of multi hole masonry brittle failure characteristics, built-in straw block in the insulation at the same time, can improve the compressive strength of masonry; masonry local diffusion mechanism under the action of stress is significant; and offer the engineering measures.
Analysis on Fire-Resistance Performance of Beams Strengthened by Carbon Fiber Sheet Bonded with Inorganic Adhesive
Authors: Wan Fu Xiong
Published: January 2014

Fire-resistance performance of beams can be improved if the beam strengthened by carbon fiber sheet bonded with inorganic adhesive instead of organic epoxy adhesive with low softening temperature. However, Fire-resistance performance of the strengthened beams is not understood fully. Considering this issue, finite element analysis is done. Stating from building valid model of finite element, computing results are compared with experimental results, and rationality of the model is verified. Then plenty of parameter analysis is done. Effect of some parameters, such as Range of carrying capacity increase by sheet, reinforcement ratio, load ratio to carrying capacity and width of section, on fire-resistance performance of the strengthened beams is analysis. The results demonstrates that reinforcement ratio and load ratio to carrying capacity is the main factors influencing fire-resistance performance of the beam strengthened by carbon fiber sheet bonded with inorganic adhesive, While, range of carrying capacity increase by sheet and width of section have little influence on it. Beams, strengthened by carbon fiber sheet bonded with inorganic adhesive, and protected by Thick-typed Fireproof Coating, perform good fire behavior.
Application of Rough Set-Neural Network Algorithm to Predict Angle of Stratum Movement in Metal Deposit
Authors: Guo Yan Hui , Hou Ke Peng
Published: January 2014

Based on a large number of research results of displacement angle in domestic and foreign caving mines, rough set neural network algorithm which is used for calculating the displacement angle of stratum is established by rough set theory and improved BP neural network theory, and which is applied in predicting displacement angle of stratum of a copper mine, The results show that the algorithm has higher precision , and the result is better than the traditional BP neural network algorithm, and providing a new method to similar mine in selecting angle of strata movement.
Characteristic of Longitudinal Coupled Prefabricated Slab Track (LCPBT): Numerical Simulation Analysis of Uneven Sub Grade Performance
Authors: Assefa Workuha Dagnew , Ren Juan Juan
Published: January 2014

With in the development of high-speed railway countrys China is one of the competent use of ballast less track spreader and largely applied on sub grade, in order to ensure high speed, safe and comfortable run of the train, the sub grade structure must provide smoother and more stable support for the upper track structure, but the problems caused by non uniformity sub grade structure performance are increasingly prominent. There have many serious problems such as low precision of measurement, low degree of automation, compaction mechanism, sometimes consolidation time and high interference of human factors. This paper described as the structural characteristics of longitudinal coupled prefabricated slab track System similar to bögl from German, a model for static analysis has been developed. Based on the model, the slab track element is presented. This element includes rail, rail fastening, prefabricated slab, CA mortar, and base plate and sub grade.
The Study on Mechanical Property for Welded Haunch-Reinforced Seismic Connections of Steel Frame
Authors: Liu Yong Juan , Wang Yan
Published: January 2014

To study on the mechanical property for haunch-reinforced seismic connection, the simplified calculation model of haunch connection is introduced. The force analysis of beam with haunch connection is carried through to research value influence on mechanical property of haunch connection; Combining American design specification with Chinese design specification, the design procedure for welded haunch connection is shown, and the differences in design between two countries are summarized. At last, it is studied through beam-column joints case analysis that the influence of the different node parameter on the mechanical property of haunch connection. The results can be got that with the increase of thevalue, the beam moment at column face becomes smaller, which will be better to protect the beam form brittle fracture. But if is larger than one,beam web shear in the haunch region will increase. In the design the reasonable value should be close to one but less than two. When haunch height is invariant, with the increase of haunch length,became smaller; the value and the top and bottom beam flange groove weld stress reduce gradually; The required minimum section area of haunch flange became larger; The axial force of haunch flange and haunch web shear increase gradually. The reasonable haunch length should be as close to the middle of the (0.5 to0.6) times of height beam as possible. The reasonable haunch flange section area should make close to, such materials are made full use. Key words: haunch connection; force analysis; parameter of reinforced-plate; mechanical property
Analysis of Thermal Effect on Girder with Side Main Rib Section
Authors: Ma Niu Jing
Published: January 2014

According to the common girder with side main rib section of PC cable-stayed bridge with double cable planes, a computational model of two-dimension temperature field is presented. Temperature gradient of main rib, small longitudinal rib, top plate and flange plate was computed respectively, and then the stress and strain of each section are derived through plane cross-section assumption. For the cable-stayed bridge, member structure FEM is applied to compute node equivalent load and displacement, which resulted from both sunshine and seasonal thermal difference. Finally, a case study is analyzed, the results showed: computed and measured deflection of girder that result from thermal effect are very close, therefore, this method is feasible.
Investigate on Axial Load Behaviors of T-Shaped CFT Stub Columns with Binding Bars
Authors: Zheng Xin Zhi , Zheng Xin Hua
Published: January 2014

. Abstract. Tests on TCFT-WB, including 11 specimens with binding bars and 5 without binding bars under axial compression were carried out. The effects of parameters on the behavior of specimens such as failure mode, bearing capacity and ductility are analyzed to provide experimental data for the following research. The formula to calculate ultimate strength of TCFT-WB columns under axial compression are deduced from the constitutive relationship of TCFT-WB. The calculated results are compared with those calculated by FEM analyses, showing the proposed formula can give reasonable predictions on the ultimate strength of TCFT-WB stub columns under axial compression.
Mixed Finite Element of Geometrically Nonlinear Shallow Shells of Revolution
Authors: Stupishin Leonid U. , Nikitin Konstantin E.
Published: January 2014

The computation method for shallow shell of revolution in mixed finite-element formulation is developed. Final equations are constructed by the Galerkin method. Results of solution of test task are represented. Precision and convergence of results is analyzed.
Large-Strain Performance Research of XPS Board under Long-Term Load for Controlling Foundation Differential Settlement
Authors: Han Xiao Lei , Ma Bo Kang , Huang Jia Pu , Kong Wei Mei , Li Wei Feng , Shi Wu
Published: January 2014

Differential settlement may occur in structure foundations for the differences between vertical loads in different parts of the superstructures, or the differences between deformation features of the foundation soils. Then it is of great significance to develop new methods for controlling foundation differential settlement by using special materials, of which the deformation features can be controlled. Through the compression tests, settlement controllable materials can be selected by comparing the bearing capacity and deformation features of different materials experimented in the tests. According to the results of the compression tests in short term and long term, this article analyzed the bearing capacity and deformation features of different materials through the stress-strain curves. The research shows that XPS (Extruded Polystyrene) boards are of high bearing capacity, large strain property and long-term property stability, and are well suited to be used in civil engineering by controlling the differential settlement of the structure foundation.
Study on Actual Finite Element Analysis of Steel Structure
Authors: Wei Qun , Jiang Hua , Peng Cheng Shan
Published: January 2014

Due to the limitation conditions of computer hardware in the past, the structure members need to be simplified in order to save the computing resources during the finite element analysis (FEA). During FEA of Steel joints, the simplified model is considered as hinge joint, rigid joint or half-rigid joint, which is different with the actual force. With the improvement of computer technology and hardware, actual finite element analysis method (AFEA) is proposed in consider of influence of actual model, welding, plate size and bolts, which is a more acceptable method in Precision compared with last.
Numerical Study of Stiffened Steel Plate Shear Wall with Opening under Horizontal and Vertical Loads
Authors: Li Zong Jing , Shu Gan Ping
Published: January 2014

When steel plate shear walls (SPSWs) are fitted into a long-span truss system, horizontal and vertical deformation should both be considered to evaluate the seismic performance of the structure. Numerical analysis is conducted to study the seismic performance of stiffened steel plate shear wall with opening subject to horizontal and vertical loading respectively based on a project. Results of the analysis indicate that stress distribution and deformation patterns of SPSW with opening are quite similar under horizontal and vertical loading. Stiffeners around the opening should be stretched to full height or width of the SPSW and strengthened by using larger thickness or width. The grids at the four corners of the opening are recommended to be further strengthened by additional stiffeners. SPSW with opening exhibits good hysteretic performance and energy dissipation in both loading directions.
Effects of Flange Width Ratio on the Residual Stresses in Welded Monosymmetric I-Section
Authors: Zhang Zhuang Nan , Zhao Xin , Zhao Ya Nan
Published: January 2014

This paper used ANSYS finite element software to simulate the residual stress of the welded monosymmetric I-section and obtain residual stress distribution curves, analyzed the influence of flange width ratio on welding residual stress peak value and the stress distribution. The studies have shown that: with the flange width ratio decrease gradually, peak value of residual stress in flange and web is to increase; peak value of residual tensile stresses in both flange and web close to the steel yield strength fy, peak value of residual compressive stresses is 0.4fy in wide flange and the web near wide flange and in narrow flange and web near narrow flange is 0.3fy; the distribution of the residual tensile stress in the flange and web have growth trend.
The Prilling Tower Wind Load Analysis
Authors: Wang Li Li , Wu Guo Zhong , Li Dong
Published: January 2014

Using static analysis method analyzes wind resistance of prilling tower. Calculated each axis and each node by force, define an array so that each node force and the corresponding values is in the array. Using loop statements for each node on the wind load, applying the load to solve, it is concluded each node in the displacement response under the action of wind load. Use MATLAB to get the result to get the need curve, and analyzes the results. Through the analysis of two kinds of structure of the prilling tower, and comparison, then conclusion, to see what kind of structural seismic prilling tower wind the better performance, and control specifications to see if it meets specifications.
Temperature Joint Treatment of Changchun International Trade Center
Authors: Xu Yin , Chen Lei
Published: January 2014

Different temperature joint treatments in Changchun International Trade Center are discussed in detail in this thesis, and meanwhile the structure treatment of 25.5m-tall non-lateral support that is formed during the design of temperature joint structure is introduced in detail. The treatment introduced in this thesis has already been applied in the real construction practice.
The Study on the Effect of the Lateral Braces on the out-of-Plane Stability of Web Openings Circular Steel Arches
Authors: Jiang Li Yun , Li Ming , Yang Sen Hao
Published: January 2014

The paper adopts large deformation elastic buckling finite element method, researches the out-of-plane stability of lateral braced web openings circular steel arches under the distributed radial load and considers the effects of rise-span ratio, arch foot condition, brace rigidity and brace quantity. Research results demonstrate that the out-of-plane buckling load of web openings circular arches increases with the rise of rise-span ratio and increases with the improvement of arch foot constraint. Buckling half waves increase gradually with the increase of lateral brace stiffness. When brace stiffness reaches the brace critical stiffness, the out-of-plane buckling load of steel arches increases will no longer increase with the rise of the brace stiffness, and the buckling mode of steel arches will transit from out-of-plane instability to in-plane instability. The improvement degree of lateral brace to the bucking load of web openings circular steel arches depends on the lateral brace quantity and the size of the brace intervals.
An Analysis of the Fire Resistance Performance of H-Section with Variance of Column Lengths at High Temperature
Authors: Kwon In Kyu
Published: January 2014

Structural columns are very important members in steel buildings. An evaluation of fire resistance performance of the column is essential to sustain the structural stability in a fire situation. However, the length of columns is dependent on various architectural design variations. Therefore, the fire resistance can be different according to the length of column. In this study, to suggest the adequate fire resistance performance of structural columns by difference of length, an analysis was done based on an ordinary structural steels, SS 400, and hinge to hinge boundary condition. The result showed that the longer the column was, the less the fire resistance.
Three-Dimension Finite Element Analysis for the Concrete Canoe
Authors: Lou Chu Yang , Wang Yu Xuan , Liu Zhe Ming
Published: January 2014

This paper focuses on the structural analysis of concrete canoes. It firstly introduces the background of the concrete canoe competition and some typical FEA methods for concrete canoes. Then the paper establishes and analyzes an FEA model with SAP2000. Considering the similarity between concrete canoes and strip foundations under column, the paper uses the foundation engineering theory of strip foundations under column to determine the support conditions, and the applied loads of concrete canoes under 2 key loading cases. The result is proved to be accurate according to the experience of Tongji University Concrete Canoe Team. Finally, a conjecture of partial plane cross-section assumption of concrete canoe is proposed according to the result of FEA.
Evidential Uncertainty Quantification of Dynamic Response Spectrum Analysis
Authors: Tang He Sheng , Yao Wen , Deng Li Xin , Su Yu , Wang Jiao
Published: January 2014

This study presents an evidential uncertainty quantification (UQ) approach for dynamic response spectrum analysis of a structural system with epistemic uncertainty. The present method is performed using an evidence theory to quantify the uncertainty present in the structures parameters such as material properties. In order to alleviate the computational difficulties in the evidence theory based UQ analysis, a differential evolution (DE) based interval optimization for computing bounds method is developed. With comparison of probability theory and interval method, the computational efficiency and accuracy of this approach method are also investigated.
Restoring Force Model Investigation of Short Pier Shear Wall
Authors: Zhang Pin Le
Published: January 2014

To study the seismic behavior of short pier shear wall, 6 short pier shear wall specimens are tested under low cyclic loading with axial load ratio of 0.2. Hysteretic rules and stiffness degradation rate are determined base on test results and feature points are defined by theory, restoring force model that considers the effect of two loading direction to hysteretic characteristics is proposed based on test research, which could be applied to the nonlinear dynamic analysis of the structure.
Finite Element Analysis of Concrete Filled Double-Skin (CHS Inner and CHS Outer) Steel Tubes under Lateral Impact
Authors: Cao Hao Yu , Wang Rui
Published: January 2014

As a new type of steel-concrete composite structure, Concrete-Filled Double Skin Steel Tubes not only have the advantages of the traditional steel concrete structures, but also carried out cross-section and great bending stiffness. This structure is widely used in high-rise buildings, bridges and power facilities. During the whole life cycle, concrete-filled double skin steel tubes may inevitably suffer from various impact loads. In current the research about steel-concrete composite structure focuses on the performance about axial compression, bias, bending, and low cyclic loads. but the research about it under lateral impact is equally import. In this paper, the behavior of concrete-filled double skin steel tubes (CFDST) with fixed boundary condition was analyzed by Finite Element Analysis method ,to analyze the destruction modal, impact force (F) , deflection () as well as other dynamic responses of CFDST under different lateral impact energy. The work mechanic and full range analysis of concrete filled double steel tube under lateral impact were analyzed. The results show that the damage of CFDST with fixed boundary condition under lateral impact is in ductile manner. Analyzed the whole process of the dynamic response basically , laid the foundation for further parametric analysis and practical calculation method.
Study on Consolidation Test for Fresh Soft Dredger Fill
Authors: Zheng Ai Rong , Liu Fan , Chen Ju
Published: January 2014

The consolidation test was performed to samples of fresh soft dredger fill with heights of 2cm, 3cm and 4cm with full-automatic pneumatic consolidometer. The results show that: the soil sample deforms greatly during the consolidation with significant decrease in water content and small consolidation coefficient. The sample height has negligible effect on the deformation rate, compression modulus, compressibility coefficient, etc., while it is closely related to the consolidation coefficient with an inverse relationship.
Probe on the Stress of the Support Crack of Welded Crane Beams
Authors: Dong Shi Er , Chen Qian
Published: January 2014

It is the load on the crane beam and the conditions of the welding that influence the stress round about the support crack between the web and the upper flange of a welded steel crane beam. Using finite element analysis software ANSYS, the stress of the welded steel crane-girders subjected to different eccentric wheel loads were analyzed. Cycles of eccentric wheel loads is the main reason to lead to the support crack appear. Some measures are put forward based on the discussion.
Finite Element Analysis on the Deformation of Energy-Saving Wire-Mesh Frame Wallboard
Authors: Zhang Li , Li Kang
Published: January 2014

This paper analyzes the influence degree of related design parameters of wire-mesh frame wallboard on deformation through finite element program, providing theoretical basis for the design and test of steel wire rack energy-saving wallboard.
A General Load-Slip Interfacial Model for FRP-Concrete Composite Beams
Authors: Zou Xing Xing , Wang Jing Quan
Published: January 2014

The present study investigated the effects of shear slip on the deformation and strength of FRP-concrete composite beams. The load-slip curves were found consisting of two phrases: load kept increasing without any interfacial slip in the former phrase and load went up linearly versus interfacial slip in the latter phrase. A bilinear interfacial model was therefore proposed to describe the function between interfacial shear force and slip in FRP-Concrete composite beams. Two dominant parameters in the model, initial bond stress (vs) and shear stiffness of the interface (k), were defined according to the testing data. Initial bond force is the shear force when slip occurs; shear stiffness is the ratio of load increase versus interfacial slip. This new model can be applied to predict the stiffness and analysis stress of the composite beam considering the effect of slip.
Effects of Snow Load on Light-Weight Steel Structures
Authors: Li Fang Hui , Meng Fan
Published: January 2014

With the rapid development of economic and construction industry, light-weight steel structural system is widely used in the modern building construction. While, the light-weight steel structures are more sensitive under the effect of snow load than the other structure systems according to the data from the large amount of accidents of steel structure failures, which indicated the necessary and urged us to focus on the impact of snow on the light-weight steel structures. This paper introduces the current research situation and analyzes the method of snow load determination on gable frames in the load code of different countries, and provides some suggestions on the snow load design of light-weight steel structures finally.
Experimental Study of Bond Behavior on Aluminum Alloy Plate-to-Concrete Interface
Authors: Zhu Ji Hua , Wei Liang Liang , Zhu Miao Chang , Li Wei Wen , Xing Feng
Published: January 2014

This paper presents an experimental study on the bond performance of aluminum alloy plate-to-concrete interface via a series of simple shear test. The parameters examined include the bond length and width of the aluminum alloy plates. Two types of failure modes were observed through the experimental program. The test results demonstrate the bond strength of the aluminum plate-to-concrete interface depends strongly on the coupling effect of bond length and width. The variation of the aluminum strain distribution along the bond length against the applied load clearly illustrates the existence of an effective bond length. The load-slip curves show that the bond width has more sensitive effect to the bond strength.
Monitoring Study of Guang'anmen Hospital Outpatient Building Foundation Pit Excavation
Authors: Xu Xing Liang , Sun Zeng Wei , Jia Liang
Published: January 2014

Monitoring is playing an important role on the building under construction (especially in deep foundation construction phase). By professional, scientific and timely monitoring, reliable monitoring data and information on security incidents that may occur can be provided timely. In this paper, Guang'anmen Hospital outpatient building foundation pit project was analyzed. The horizontal displacement at the top of supporting structure and settlement of the surrounding buildings were discussed. The results show that the horizontal displacement and the impact on surrounding buildings is within a permissible range, which entailed the safety of the foundation pit.
Bridge Vibration and Cable Force Monitoring System Integration
Authors: Xiao Chun , Zhou Chun , Liu Zi Hao , Li Qiang
Published: January 2014

Bridge Structural Health Monitoring System mainly monitors vibration and cable force of bridge. Fiber optical sensor is chosen to measure vibration and cable force, and their computing method is also given. Besides, wavelet de-noising and Multi-harmonic extraction technology is used to process data. In order to collect, analyze, display and store data, the system use LabVIEW and SQL Serve platform with multi-thread and multi-protocol technology. System regards the one Wuhan Yangtze River Bridge as real-time monitoring objects, and all the indicators have reached the design requirements.
Research Based on Modal Curvature and Wavelet Transform for Identifying Damage of Reticulated Shell Structures
Authors: Wang Meng Hong , Ji Chen Meng , Luo Shan Shan
Published: January 2014

In this paper, a research is carried on to identify damage of reticulated shell structures based on the combination of modal curvature method and wavelets transform method. Take a scaled model of the reticulated shell structure as an example to analyze, the cross section of one member supposed to have a slight damage of stiffness reduction. In order to locate the damage, modal curvatures of the structure are taken as damage indexes to perform continuous wavelet transform. Results of the numerical analysis indicate that the difference of wavelet transform coefficients of modal curvature can be used to locate damage roughly, while the wavelet transform coefficients of modal curvature difference can be used to locate damage more precisely with easier and more reliable data processing. So it is clear that the damage identification based on modal curvature and wavelet transform is quite effective.
Predication of Rock Cutting Force of Conical Pick Based on RBF Neural Network
Authors: Tang Xiang Ping , Wang Duan Yi
Published: January 2014

The mechanized level of coal mining work is developing rapidly, the roadheader and shearer are the most important equipments. The conical pick acts on coal or rock directly, and its design and selection play an important role in the operational reliability of these equipments. However, the cutting force is the basis to design and select conical pick [1, . At home and abroad, many researchers attempted to establish the theoretical models for calculating the peak cutting force of conical picks. Evans used the maximum tensile criterion to set up the theoretical model for conical pick, and the model was widely used in the design of roadheader, shearer and so on in Europe and America [. Goktan et al. developed the presented model based on Evans theoretical model, and they given the modified model [. Okan et al. adopted the finite element method and the discrete element method to simulate the rock or coal cutting process to predicate the cutting force [. As mentioned above, the theoretical model is easy to calculate the cutting force, but the results have big difference with the experimental result due to simplify the relations between the cutting force and parameters. The numerical method is difficult to predicate the cutting force accurately, because the influence of rock or coal constitutive model, element failure criterion and boundary condition on cutting process. Therefore, the RBF Neural Network for predicating the cutting force was established base on a large amount experimental data in this paper. The aim is to predicate the cutting force accurately and reliably, and provide some basis to design and select the concial pick.
Comparison of the Shear Resistance in the Sliding Joint between Asphalt Belts and Modern PVC Foils
Authors: Smirakova Martina
Published: January 2014

This paper deals with sliding joint in the foundation structure. Application of sliding joint into foundation structure is an effective method to reduce effect of horizontal deformation of foundations. These can arise from effect of undermining or from shrinkage or creep of concrete. A different material can be used to create sliding joint but some are advantageous and some are not. It is often used an asphalt belt or newly different modern foils are used too. Different types of asphalt belts are tested at Faculty of Civil Engineering at different loads and at different temperatures. Some foils are tested too. The effect of ambient temperature is monitored to better description of temperature dependency of asphalt belts. Long-term goal of this research is to simplify process of design buildings with sliding joint and to help designer with right choice of the most advantageous material.
Factors Influencing Hoop Rupture Strains of FRP-Confined Concrete
Authors: Lim Jian Chin , Ozbakkloglu Togay
Published: January 2014

It is now well understood that the hoop rupture strain of fiber reinforced polymer (FRP) jackets confining concrete is often lower than the ultimate tensile strain of the component fibers. A number of reasons for the lower hoop rupture strains in FRP have been identified; however, the relationships between the material properties of FRP-confined concrete and hoop ruptures strains are yet to be established. This paper presents the results of an experimental study into the factors influencing the hoop strain efficiency of FRP jackets. 24 FRP-confined concrete specimens were tested under axial compression. The results indicate that the hoop rupture strains of FRP jackets decrease with either an increase in the strength of the unconfined concrete or the elastic modulus of the fiber material. These observations were verified by additional results from a large FRP-confined concrete test database assembled from the published literature.
Experimental Research on Statnamic Load Test of Long Rock Socket Bored Pile
Authors: Sang Deng Feng , Su Lin Wang , Wang Zhan , Tan De Yin
Published: January 2014

Through the Statnamic load test on working bored pile, the displacement of pile top and the distributing of axis force along the bored pile were brought forward and two methods were used for interpretation the test result. The bearing capacity, axial force, shaft friction and pile toe resistance of pile were all illustrated. The result show that the Statnamic load test method can check the pile capacity quite easily, it is quite difficult to test the ultimate pile capacity.
Variation of Hoop Strains in Concrete-Filled FRP Tubes with Concrete Strength, Amount of Confinement and Specimen Slenderness
Authors: Vincent Thomas , Ozbakkaloglu Togay
Published: January 2014

This paper presents an experimental investigation on the variation of FRP hoop strains around specimen perimeter and along specimen height. A total of 24 concrete-filled fiber reinforced polymer (FRP) tubes (CFFTs) with circular cross-sections were tested under monotonic axial compression. The CFFT specimens were instrumented with numerous lateral strain gauges attached to the FRP tubes to examine the development of hoop strains along the specimen height and around specimen perimeter. Specimens were manufactured with height-to-diameter ratios (H/D) of 2 or 5, with all specimens maintaining a nominal diameter of 150 mm. Additional test parameters selected for this study included amount of confinement and concrete compressive strength. This paper focuses on the experimentally recorded hoop strains and their variation around specimen perimeter and along specimen height. The results indicate that hoop rupture strains along the height of CFFTs become more uniform for specimens with higher amounts of confinement. On the other hand, the variation of hoop strains around the perimeter of CFFTs was not observed to be significantly influenced by height-to-diameter ratio (H/D), concrete strength or amount of confinement.
Analysis Interlayer Shear Stress of Ultra-Thin Wearing Course Considering Temperature and Different Interlayer Contact Conditions
Authors: Yang Yan Hai , Shen Yang , Gao Xiao Xi
Published: January 2014

The paper studies that temperature and different interlayer contact conditions between ultra-thin wearing course and original pavement have an impact on interlayer shear stress. Calculate parameters of each layer asphalt mixture materials under different temperature through empirical formula. Substitute the parameters into BISAR3.0 software to calculate maximum interlayer shearing stress of ultra-thin wearing course under different temperature and interlayer contact conditions. The results show that interlayer contact conditions and temperature have a great influence on interlayer shearing stress of ultra-thin wearing course.
Prediction of Urban Rail Transit Sectional Passenger Flow Based on Elman Neural Network
Authors: Li Qian , Qin Yong , Wang Zi Yang , Zhao Zhong Xin , Zhan Ming Hui , Liu Yu
Published: January 2014

This paper based on the feature of Beijing urban rail transit sectional passenger flow, combined with Elman neural network. After carrying out modeling experiment many times, a reasonable forecast model about the prediction of urban rail transit sectional passenger flow was established. Then the Elman neural network model was used to predict the sectional passenger flow of Beijing Subway Line 1, from Xidan station to Fuxingmen Station. At last the output results was compared with that of BP neural network, the result shows that the Elman neural network is more precise and effective than the BP neural network in the prediction of urban rail transit sectional passenger flow.
A Study of an Adaptive Two-Phrase Signal Control Strategy for Resolving Conflicting Transit Signal Priority Calls
Authors: Gao Liu Yi , Hu Xiao Jian , Wang Wei , Hua Xue Dong
Published: January 2014

This paper presents the development and evaluation of an adaptive two-phrase signal control strategy to resolve conflicting Transit Signal Priority (TSP) requests. The strategy was designed to provide adaptive transit signal priority control, using vehicle systems and existing traffic control devices. In this paper, the strategys efficiency was tested using a micro-simulation software VISSIM and build one arterial road contains five intersections and serves more than twenty conflicting bus lines. The VAP module was used to control TSP of conflicting requests. In the simulation, actual data was used. Finally, control efficiency about adaptive signal control strategy is discussed. The results show that the presented strategy can improve the operation efficiency of bus corporations. This signal control strategy reduced the travel delay time by 33 % to 55% of transit, while has little impact on private traffic. The strategy shows promising results. In addition, with minor upgrades, it can be applied to any type of intersection.