bluuebunny/crossref_metadata_2025 huggingface dataset:
Survey of Fire Load in Building Furniture Store
Authors: Wang Jin Ping
Published: July 2014

There are many combustible materials in building furniture stores with complex people traffic and high risk of fire disaster. Fire load as the represent of flammable material, and the building fire risk can be grasped by the data obtained. Through investigation and statistics on the fire load density value of building furniture store, it is convenient for performance fire safety design. According to the survey, fire load density average value is determined of 382.71 , the standard deviation is of 143.46 . After fitting the survey data, the data distribution do not refuse to obey the extreme-value Idistribution, so this distribution can be the basis of fire design in other corresponding building furniture stores.
Tornado Hazard Loss of Nuclear Power Plant Building during Design Service Period
Authors: Song Tuo , Lu Ling Yi
Published: July 2014

Based on the concept of Life Cycle Cost, we propose a methodology to evaluate the expected economic loss of building caused by tornado disasters during design service time and this methodology is examined by applying to a simplified nuclear power plant main house model.
Landslide Susceptibility Zonation Based on the Analytic Hierarchy Process and Information Method
Authors: Qiu Dan Dan , Niu Rui Qing , Zhao Yan Nan
Published: July 2014

Landslide susceptibility zonation is one of the research hotspots in the field of landslide research. It is important in the process of disaster prevention and land planning. Select Wan Zhou as study area; it is one portion of the Three Gorges Reservoir Area. According to existing landslide statistical data, select lithology, slope gradient, slope structure and reservoir grade as impact factors. Use analytic hierarchy process and information method to calculate weighted value of each factor respectively, and then combine them. The landslide susceptibility zonation was done by ArcGIS. This method can unite the advantages of the disaster data and expert experience. According to statistics, result accuracy rate is 90.3%.The key area of landslide disaster prevention can be obtained from the landslide susceptibility zonation map.
Modelling of the Human Behavior in Evacuation
Authors: Wei Lan , Zhao Chao Yang , Yuan Wei Feng
Published: July 2014

Emergency evacuation is an important issue in fire safety. In this study, a cellular automaton (CA) model in which the human behaviour termed ‘flow with the stream’ is considered is proposed to simulate the procedure of emergency evacuation. Based on the CA model, the influence of the number of guiders to the evacuation from a large compartment is analyzed through numerical test. The result shows that the proposed CA model is a promising tool that may be used in fire safety design.
Numerical Simulation on Ghosting Fire in the Confined Underground Space
Authors: Zhang Pei Hong , Lu Xiao Wei , Zhang Xiao Ming
Published: July 2014

The phenomenon of ghosting fire development in underground confined space is simulated to analyze the impacts of ghosting fire generation via some conditions -- different air vent sizes and different fire source areas. FDS is used to establish a physical model of underground fire laboratory in Northeastern University, the simulation is conducted by setting two parameters, the air vent size and the fire source area. The fire heat release rate, temperature, concentration of CO, O2 are measured to analyze the case of ghosting fire generation in underground confined space with different air vent sizes and different fire source areas. It’s most likely to generate ghosting fire when the simulating parameter is that the air vent size is 0.4m × 0.4m and the fire source area is 0.96m2. The conclusion is that increasing the air vent size is not a simple ascending and descending relationship with the occurrence time and duration time of the ghosting fire. Increasing the fire source area can improve the fire heat release rate effectively, and promote the formation of ghosting fire.
Design and Realization of 3S Technology-Based Geological Disaster Database System in Liaoning Province
Authors: Ding Hua , Sun Li Shuang , Wang Jing Li , Wang Xin
Published: July 2014

This paper absorbs much successful experience from geological disasters database system designed and built at home and abroad, based on remote sensing (RS), geographic information systems (GIS) and GPS technology, adopt AHP, fuzzy comprehensive evaluation model and method of establishing three-dimensional model of geological disasters in high-risk areas, the paper constructs geological disasters database system in Liaoning Province, this database system can manage and monitor geological disasters and provide strong support analysing geological disasters for Liaoning province areas.
Risk Assessment of Debris Flow Based on Multi-Objective Fuzzy Pattern Recognition Method in Mountain Highway Construction
Authors: Wang Yue
Published: July 2014

It is inevitable that road routes cross the valley landforms in the construction of mountain road, and the debris flow risk assessment is one of the important basis works of engineering geological investigation. This paper presents the evaluation indexes and the classification standards of the danger evaluation based on the surveying data of road and analysis of the developing characteristic, formation conditions and influent factors of the debris flow in mountain highway construction area, Zhangjiakou city. With the multi-objective fuzzy pattern recognition method, the evaluation model is also established. With this model, the 15 debris flow valleys in the construction area are evaluated. The result is consistent with the field surveying result, which proves that the model represented by this paper is feasible and effective, and the results can reflect the actual situation. Thus, the multi-objective fuzzy pattern recognition method can be one of the methods to evaluate the danger grade of the debris flow.
Response of Non-Homogeneous Saturated Soils and Free-Field to Incident Plane SH Wave
Authors: Zhou Feng Xi , Song Rui Xia
Published: July 2014

Based on the Biot’s Theory, the dynamic response of non-homogeneous saturated soil has been studied using Helmholtz vector decomposition principle and Exact Dynamic Stiffness Method (EDSM). Reflection and transmission of SH wave in non-homogeneous saturated soil have also been analyzed in considering the continuous variation of physical and mechanical properties of saturated foundation along the thickness. The general calculation formula about the reflection and transmission coefficients of bedrock and free field on both surfaces was achieved. Assuming that the material properties have an exponential law distribution and gradient variation along the thickness-coordinate, the dynamic response of non-homogeneous saturated soils under incident plane SH wave was discussed by numerical examples. The results show that the incident angle, the thickness and heterogeneity index of saturated soil have significant influences on the ratio of the ground displacement and bedrock displacement.
Multivariate Geometric Factors Contributing to Crashes and Injuries in Mountainous Freeways: A Case Study from Jiangxi, China
Authors: Li Ming , Wang Yong Gang , He Xin
Published: July 2014

Mountainous freeway goes through complex geographic and geological regions and causes safety problem. Making clear of the inner relationship of the crash occurrence and the geometric factors is the most fundamental prerequisite to solve the problem. This paper reveals the contributing geometric factors through analyzing the crash data from Changjin Freeway, a typical mountainous freeway located in Jiangxi Province, China. Based on crash records and designed alignment data, contributing geometric factors are generally classified into three categories: vertical alignment, horizontal alignment, and cross section. And then detailed effects of geometric variables are separately discussed and quantified through the relation with crash rate (CR).
Research on Functional Adaptation of Sport Venues as a Disaster Prevention Refuge
Authors: Huang Li Di , Zhang Tian Yu
Published: July 2014

Through the survey of the current situation of sport venues as disaster refuge at home and abroad, the advantages of sport venue were widely dissussed from open space outside the sports venues, characteristic of main stadium and information transceiver system. The distribution structure of the hierarchical network of sport venues was analysised. Finally, some examples of sport venues as disasger refuge were proposed. It will be new development trend of stadium and sport venue in the future.
A Research on Digital City Three-Dimensional Visualization System Based on Skyline
Authors: Dai Hong Bao , Yue Xiang Jun , Xu Ji Ying
Published: July 2014

As an important living place for human beings, city is regarded as a main place for the birth, spread and development of human civilization. This paper, based on the principle of system development and combining with the need of building “Digital City”, makes an overall design of the “Digital City” 3D visualization system. Firstly, a 3D ground objects model, i.e. .x files, is made through inputting the ground objects of the experimental area into 3DSMAX, then, the .x files are converted to .xpc files in order to achieve a better displaying effect in producing a 3D landscape. Secondly, the author makes corresponding pre-processing to the aerial photos, satellite images, topographic data, digital elevation models and a variety of vector geographic data, and then superimposes and loads these data into Terra Builder module of Skyline software, which generates 3D topography landscape, that is, .MPT files and forms the terrain database required in Terra Explorer Pro software. Next, a 3D landscape is preliminarily established by inputting the 3D terrain model and the 3D ground objects model, i.e. .MPT files and .xpl files, in Terra Explorer Pro, and by editing a real and accurate 3D geographic model and a real Digital City 3D landscape model, that is, FLY files, are respectively formed. Finally, on the basis of the 3D landscape model, the system is developed by using Visual Basic + TerraDeveloper and the basic operation of 3D, spatial analysis, visible analysis and other basic functions are preliminarily achieved
Information Management of Maritime Work Based on GIS
Authors: Liu Jun Ping , Dong Fei Long , Shao Jia Wei
Published: July 2014

Seawall is an important barrier of Zhejiang coastal strip. To effectively manage the information of maritime work in Zhejiang and convert the traditional management into the modern management, the information management system of maritime work based on GIS is developed. Take Kaomen seawall for example, the overall structure of information management system based on GIS is designed, focusing on the data entry, spatial attribute show, spatial attribute query, spatial information statistics and analysis. This design plays a significant role in the flood control and disaster reduction in the future, making the information management of maritime work convenient and practical.
Application of Total Station in the Measurement of Transmission Line
Authors: Gui Fang Ru
Published: July 2014

Through analyzing the difficulties in the measurements of Wangling hydropower station’s transmission line, this paper proposes an idea that total station is applied to complete line measurement on the basis of the point guiding alignment measuring technique, which aims at providing a reference for other similar projects.
Chinese Geodetic Coordinate System 2000 and its Comparison with WGS84
Authors: Li Hou Pu , Bian Shao Feng , Li Zhong Mei
Published: July 2014

It is a general trend to adopt the geocentric coordinate system as a geodetic datum for the international measurement community. The definition and realization of Chinese geocentric three-dimensional coordinate system (CGCS2000) which has been employed since July 1st, 2008 were introduced in detail. The defining parameters and derived constants of the reference ellipsoid used were given. The comparison between CGCS2000 and WGS84 was carried out. The differences of geodetic coordinates of a point between the two coordinate systems, normal gravity and vertical gradient of normal gravity on the two ellipsoids caused by the change of the flattening of the ellipsoid were analyzed. The results show that these differences could be neglected in view of present measurement accuracies.
Analysis of Monitoring Results of a Deep Foundation Pit with Pile-Anchor Retaining Structure
Authors: Yang Xiao Hua , Wu Fang Wu , Chen Teng , Liu Xing
Published: July 2014

According to characteristics and surrounding environments of a deep foundation pit with pile-anchor retaining structure, a monitoring program was developed. The monitoring focused on horizontal displacements of retaining piles, subsidence of soil surrounding foundation pit and settlements of buildings near foundation pit. The results show that the maximum displacements are in middle position of sides and at corners of foundation pit. The horizontal displacements and settlements of pits are efficiently rejected by anchors. The displacements of buildings near foundation pit are affected by many factors, such as the excavation speed and anchor. The displacement exists characteristics of time and spatial effects. The monitoring results provide a reliable basis for the safety construction and rational organization of construction.
Research on Control Methods of Measuring Super High-Rise Buildings
Authors: Xie Xu Yang
Published: July 2014

This paper took Guangzhou New TV Tower as an example to introduce how to ensure the systematicness and controllability of vertical measurement through the control survey in the process of constructing the high-rise buildings, how to ensure the unity of the each axis system in monomer construction and unity of the whole structure, providing a reference basis for similar projects.
Correction of Atmospheric Effect in EnviSAT ASAR Repeat-Pass Interferometry with MODIS Water Vapor
Authors: Sun Guang Tong , Song Ping , Liu Xiao Yang
Published: July 2014

The atmospheric phase delay due to tropospheric water vapor has been one of the major limitations for the application of high precision repeat pass InSAR. In this paper, we present the atmospheric correction methods and key technology for ASAR interferograms with MODIS integrated water vapor data, then, conduct the atmospheric corrections using ASAR interferometric pair over the Taiyuan region as examples. The experimental results show that the MODIS\ASAR atmospheric correction method can greatly improve the quality of interferogram, and the deformation inversion accuracy can be significantly improved, verify the necessity and reliability of MODIS and ASAR data fusion for obtaining information of surface deformation.
Construction Techniques and Mechanism of Pre-Anchoring Fissured Stope Hangingwall by Fully-Grouted Cable Bolts
Authors: Zhan Feng Lin , Ye Ping
Published: July 2014

The construction techniques and anchoring mechanism of pre-anchoring fissured stope hangingwall of some copper mine in China by fully-grouted cable bolts are explored. The construction stages such as drilling anchor holes, making anchorage cables and cement mortar, grouting, and curing are expounded. A combined action mechanism of pre-anchoring fissured stope hangingwall by fully-grouted cable bolts is presented. The achievements are helpful and beneficial to the design and construction of rock engineering projects which need anchoring reinforcement, such as slopes, tunnels, deep foundation pit, caverns, and underground mining.
GPS RTK Techniques for Construction Monitoring of Super Deep-Water Open-Caisson
Authors: Hao Yan Guang , Liu Xiang Liang , Liu Jian Bo
Published: July 2014

The super open-caisson foundation of Taizhou Yangtze River Bridge was used by positioning system of anchor piers. GPS RTK Techniques was used to real-time monitor the open-caisson and by software compute current geometric posture of open-caisson timely. This could provide guarantee for sinking of caisson, and shorten construction period and save cost.
Triangle Interpolation on Discrete Point Set
Authors: Jiang Hong Fei
Published: July 2014

An algorithm for triangle interpolation on discrete points is presented in the paper. It creates a square mesh which covers all the discrete points, then puts the points into the mesh and records the relationship between grids and points. When interpolating elevation of an interpolation point, it can fast find the discrete points which are near the interpolation point and these discrete points can be used to create a special triangle which contains the interpolation point. The elevation of the interpolation point can be obtained from the triangle. The method has the advantage of fast speed, high precision and needing less memory.
Increment-Dimensional Precise Integration Method of Oil-Water Coupling Flows in a Low Permeability Reservoir with Capillary Pressure
Authors: Mei Fu Liang , Li Gui Ling
Published: July 2014

The simulation of two-phase oil-water coupling flows in a low permeability reservoir with capillary pressure and start-up pressure gradient was carried out. First of all, the state equations with all the oil pressures at grid nodes were established based on lump-centre finite difference method. Secondly, the recurrence formulae of all the oil pressures and water saturations at grid nodes were built up according to IDPIM and an explicit difference method, respectively. Finally, the simulation of two-phase oil-water coupling flows for a typical five point area water injection as an example was carried out. Simulating results show that capillary pressure has a little effect on moisture rate and oil production, but startup pressure gradients have an outstanding effect on them. Therefore the existence of startup pressure gradients will enhance the difficulty of oil development.
Simplified Bishop Method Homogeneous Soil Slope Stability Analysis Based on the C# Language
Authors: Wei Hai Bing , Zhang Qian , Zhao Jun Hai
Published: July 2014

A computer program was compiled based on the C# language of Microsoft Visual Studio 2008 and the principle of simplified Bishop method. The program will calculate the minimum factor of safety, and automatically draw the two-dimensional (2-D) critical slip surface after user input the basic parameters. Through testing a lot of examples, the program has good stability, high precision, fast speed and good visibility.
Mechanical Behavior Analysis of Concrete Short Columns Pushed out from Over-Thick Steel Tube
Authors: Liu Jie Min , Yang Jia Liang , Liu Shuang
Published: July 2014

An axial symmetry elasticity model of the concrete short column which is pushed out from over-thick steel tube is set up, and the equations of displacement method are derived. The experiment of push-out test of the short column was carried out. On the base of the test, the adhesive thin-layer between the concrete and the over-thick steel tube is introduced. The experimental results show that the shearing stress in the adhesive thin-layer is uniform along the height, which is coincide with the results obtained by the axial symmetry elasticity model of the concrete short column set up in this paper. Therefore, the adhesive shearing stress between steel tube and concrete can be precisely measured by the push-out test of the concrete short column and the relation of shearing stress-shearing strain of the adhesive thin-layer can be determined.
Theoretical Foundations of Correct Wavelet-Based Approach to Local Static Analysis of Bernoulli Beam
Authors: Akimov Pavel A. , Aslami Mojtaba
Published: July 2014

This paper is devoted to correct and efficient method of local static analysis of Bernoulli beam on elastic foundation. First of all, problem discretized by finite difference method, and then transformed to a localized one by using the Haar wavelets. Finally, imposing an optimal reduction in wavelet coefficients, the localized, reduced results can be obtained. It becomes clear after comparison with analytical solutions, that the localization of the problem by multiresolution wavelet approach gives exact solution in desired regions of beam even in high level of reduction in wavelet coefficients. This localization can be applied to any arbitrary region of the beam by choosing optimum reduction matrix and obtaining exact solutions with an acceptable reduced size of the problem.
Theory Analysis of Functionally Graded Materials Cylindrical Shell Buckling under Pure Bending
Authors: Cheng Wei , Wang Zhi Gang , Long Shu Chang
Published: July 2014

Buckling behavior of functionally graded materials cylindrical shell under pure bending is studied in this paper. The stability equations of functionally graded materials cylindrical shell are derived using the classical plate and shell theory with Kirchhoff hypothesis, importing the bending boundary condition to obtain the critical buckling load. The result shows that the critical moment is linear with the radius, quadratic with the thickness and irrelevant with the length of the cylindrical shell. In addition, the critical moment is decreased by increasing the power law index of the material bulk, trending to a constant finally.
Some Recent Developments in Coupling of Finite Element and Boundary Element Methods - Part I: An Overview
Authors: Elleithy Wael , Leong Lau Teck
Published: July 2014

Conventional and a class of domain decomposition finite element–boundary element coupling (FEM–BEM) methods are reviewed. This is Part I of two papers. In Part II, a review of the mixed Dirichlet-Neumann domain decomposition FEM-BEM coupling method is presented and optimal dynamic values of the relaxation parameters for the mixed Dirichlet-Neumann FEM-BEM coupling method are, furthermore, derived.
State Space Solution of Response for Piles Subjected to Lateral Loads
Authors: Mei Fu Liang , Li Gui Ling
Published: July 2014

A state space method has been put forward for finding the deformations and internal forces of piles subjected to lateral loads. First of all, a pile was divided into a number of pile segments, on which the foundation reaction coefficients were viewed as a constant based on the three parameter method. Secondly, state space equations of all the pile segments were established according to Euler-Bernoulli’s beam theory and the equilibrium conditions of a pile segment. At last, a state space solution of a pile subjected to lateral loads was obtained using the boundary conditions at the top and bottom end of the pile and the continuous conditions at the interfaces between two adjacent segments. Numerical results show that the state space solution agrees well with the semi-analytical one, and all the computational formula, procedure and programming are very simple.
Study on Downburst Wind Load under Characteristic Topography
Authors: Wu Yuan Ze , Sun Yi , Shi Hai Tao , Ji Bai Feng
Published: July 2014

Gemorphological type is the important factor influencing the downburst wind profile. In this thesis, firstly we determine four categories of landform types under the criteria of roughness. The CFD pre-processing software GAMBIT was used to build considering the landscape type's downburst CFD computational model. Then, the established CFD computational model was imported to the calculated hydrodynamics software FLUENT to take the numerical simulation of the downburst under different landforms. Finally, in allusion to the numerical simulation result, make the research of the wind characteristics.
The Study on Differential Equations Method for Solving Column-Pile Structural System Internal Forces
Authors: Fu De Cheng , Wen Yu Hui , Wang Lei
Published: July 2014

Based on material mechanics theory that loads-internal force-deformation relationship of rod, this paper establish elastic foundation beam model, and establish loads-internal force-deformation differential equation of piles and columns, and identified boundary conditions according to mechanical analysis of piles and columns, Based on the boundary conditions, deformation coordination and internal force equilibrium conditions, solving differential equations, then obtain column - pile components’ internal forces. This method has good mechanical model support, and using mathematical computing software can derive the analytical expressions.
Thermocapillary Convection of Low Prandtl Number Fluids under Uniform Magnetic Fields
Authors: Liang Ru Quan , Bei Di , Yan Fu Sheng , Geng Dian Qiao
Published: July 2014

Numerical simulations on thermocapillary convection of low Pr number molten tin under uniform magnetic field have been conducted under microgravity. The Navier-Stokes equations coupled with the energy conservation equation are solved on a staggered grid, and the free surface is captured by using the level set method. The present results show that the transverse uniform magnetic field can restrain the thermocapillary convection, and the fluid velocity at the hot corner fluctuates with a constant frequency at the steady state.
Subgrade Limit Bearing Capacity Calculation Using Slip Line Method
Authors: Sun Qian Qian , Zhou Tai Quan , Gu Xiao Jie
Published: July 2014

Limit bearing capacity of foundation soil was studied in the paper using slip line method. Slip line results are found to be consistent with the results calculated by Terzaghi theoretical formula and Hansen theoretical formula. Then the influence of factors such as cohesion and friction angle is studied under complete smooth or complete tough conditions. The results show that in a certain range, limit bearing capacity of foundation increases with the increase of C0, Φ. Limit bearing capacity of foundation under complete smooth condition is lower than the complete tough one.
About Verification of Correct Wavelet-Based Approach to Local Static Analysis of Bernoulli Beam
Authors: Akimov Pavel A. , Aslami Mojtaba
Published: July 2014

This paper is devoted to verification of correct and efficient wavelet-based method of local static analysis of Bernoulli beam on elastic foundation, proposed by authors. Corresponding results for sample problem have been compared with analytical solutions. Comparison shows that the localization of the problem with reducing its size by proposed method provide high-accuracy results for desired regions of the structure even in high level of reduction in wavelet coefficients. It should be noted that, the wavelet analysis can exactly decompose problem and the sources of the observed error between the analytical solution and numerical result, is based mainly on applied method for solving (in this case, finite difference method), and can be improved.
Determining the Frequency of Free Oscillations Geometrically Nonlinear Shell Using the Mixed Finite Element Method
Authors: Stupishin Leonid U. , Nikitin Konstantin E.
Published: July 2014

Considered small oscillations geometrically nonlinear shallow shell of revolution relative to the initial deformed state. Isotropic material model is considered. Problem is solved by mixed finite element method. Results of solution of test task are represented.
A Comparison between the Matrix Displacement Method and the Finite Element Method in Solving Frame Structure with SM Solver Software
Authors: Cheng Li Juan , Yan Xin Chi
Published: July 2014

Using matrix displacement method and the finite element method to calculate the internal force of the same frame, and then comparing the results. Meanwhile, due to the theory that SM Solver can calculate the exact solution of rigid frame structure forces, we use it to support our experiment. Finally, we succeed in calculating and proving that Matrix displacement method and the finite element method have the same result in solving the rigid frame structure forces.
Finite Element Solution in Fluid Mechanics Using Exponential Function Based Interpolation
Authors: Fang Shao Wen , Yuan Xing Fei , Qian Ruo Jun , Jiang Shu Hui
Published: July 2014

The wave problem of finite element solution of one dimensional stationary convection diffusion equation is analyzed. The reason for wave is the poor continuity of linear Lagrange shape function. By using exponential function based interpolation (EFBI), the results of finite element solution are compared with that of the analytical solution. The results indicate that EFBI is effective to deal with the problem of numerical wave. The shape function of three dimensional EFBI is derived and analyzed. Morphological analysis shows that EFBI has good differentiability and adaptability.
Study on Reduced Order Model in Large-Span Roof Vibration under Wind Actions
Authors: Sun Fang Jin , Zhang Da Ming
Published: July 2014

Reduced order model was for the first time employed for the large-span structure by system identification approach. The structure’s modal amplitudes are utilized to construct strain energy function of the system. A high fidelity finite element model is adopted to calculate modes and strain energy information to determine the unknown coefficients in the strain energy function. Wind-induced responses of a large-span structure were computed by the proposed method. The results were compared well with those obtained from the high fidelity finite element model and experiments. It proves that reduced order model is an effective way to compute large-span structure responses under wind actions when taking aero-elastic effects into account.
The Foundation of Nonlinear Finite Element Model
Authors: Wang Bing , Liu Xiao , Zhao Bai Dong
Published: July 2014

This paper introduces the process of the nonlinear finite element model which is established by using ABAQUS software, and introduces the characteristics of ABAQUS software, meanwhile, lists the constitutive relation of steel pipe, steel and concrete, finally introduces some experimental model.
Properties and Moving Time Average for Lévy Walks with Power-Law Waiting-Time Distributions
Authors: Deng Kai Ying , Deng Jing Wei
Published: July 2014

Lévy walks are a natural model for the description of sub-ballistic, superdiffusive motion. The waiting times and jump lengths of Lévy walks are coupled in the form . The-coupling introduces a time cost for each jump in the form of the generalized velocity , such that long jumps get penalized by a higher time cost. In this paper, we firstly investigate the properties of Lévy walks with power-law waiting-time distributions; then discuss its moving time average.
The Explanation of Yield Surface Rotation of Sands by Principle of Thermodynamics with Internal Variables
Authors: Chen Jing Yu , Hai Ying
Published: July 2014

Using constitutive modelling principle of thermodynamics with internal variables, the yield surfaces rotation of saturated sands subjected triaxial compression stress state are justified and explained. The explanation for the yield surfaces rotation of saturated sands prove the correctness and feasibility for the principle of thermodynamics with internal variables to construct elastoplastic constitutive relation of saturated soils.
The Scattering of Circular Cylindrical Cavity with Time-Harmonic SH Waves in Infinite Strip Region
Authors: Cai Li Ming , Qi Hui , Pan Xiang Nan
Published: July 2014

The scattering of time harmonic SH waves by arbitrary positions of circular cylindrical cavity is studied in continuous, homogeneous, isotropic, elastic strip region. In this paper, the completely analytical expression of total wave field is explicitly presented and the dynamic stress distribution is symbolically visualized in the strip region. The total wave field is divided into four sub wave fields, incident wave field and scattering wave field by the upper bound, the lower bound and the cylindrical bound, on big arc supposition. Specific wave functions are employed for each wave field expansion in series, such as circular cylindrical functions, respectively. Corresponding infinite linear algebraic equations are constructed by means of solving coefficients of Fourier series expansion on each sub wave field. Coefficients of cylindrical function expansion of each sub wave field are determined by truncated equations, which are reduced number of coefficients on pre-given computational accuracy. Numerical results graphically describe the dynamic stress concentration factor around the circumference of the cavity and the normalized dynamic stress along the cross section directly above the cavity.
MIDAS-Based Finite Element Analysis of the Short Line Method of the Precast Segmental Bridge Construction
Authors: Guan Lin Kun , Zhang Xie Dong , Lei Hui
Published: July 2014

This paper studies the precast and cantilever erection process of pre-stressed concrete continuous beam bridge alignment control in short line method, basis on the construction of a light rail. Various stages of bridge construction performed on simulation analysis and calculated by the finite element software MIDAS, concluded the ultimate internal force and deformation values, and the maximum deformation are within the scope of design elevation deviation 20 mm allowed, as to achieve the target of bridge assembly.
Investigation on the Wind Pressure Asymmetric Coefficient of Transmission Line
Authors: Hao Wei , Li Bo , Yang Jing Bo , Yang Feng Li
Published: July 2014

The wind pressure asymmetric coefficient is used to express the variation of wind distribution along the transmission line. In this paper, the value of the wind pressure asymmetric coefficient in some international codes is discussed and compared. It’s shown that the coefficient has no relationship with the span length of transmission only in Chinese code. When the span of the checked transmission line is small, the wind pressure calculated based on Chinese code will be smaller than that based on others.
An Integrated Simulation System for Building Structures
Authors: Duan Jin , Chen Xiao Ming , Qi Hu , Li Yun Gui
Published: July 2014

In this paper, an integrated simulation system for building structures is presented to satisfy the engineering requirements for high performance simulation. It is a coalition of the traditional design softwares and general finite element analysis (FEA) softwares. This system is developed in the platform of Intel Fortran, using the programming language of Fortran2003/2008. For simplicity, it would be introduced and discussed briefly in the following article. And combining with YJK and ABAQUS, this system is implemented to perform dynamic analysis for a high-rise building. Its capacity and validity would be demonstrated by the numerical results.
Simulation on SHTB Apparatus Design Based on ANSYS/LS-DYNA
Authors: Xiao Gui Feng , Jiang Xi Quan , Zhou Ying Chun , Yan Jun
Published: July 2014

Split Hopkinson Tensile Bar (SHTB) apparatus is widely used in experimentally investigating the mechanical properties of materials. The experimental results are significantly depended on the amplitude, the shape and the wave length of incident wave. However, theres no research on the effect of incident wave especially the influence of parts of the SHTB equipment has been put forward. The mechanism of the overlying and the amplitude of incident wave by FEM has been analyzed, which can give much help for the theory basis of SHTB apparatus design.
Numerical Simulation of SHPB Test for Concrete under Confining Pressure
Authors: Zhang Hua , Xie Ao Yu , Gao Yu Wei
Published: July 2014

Using the HJC dynamic constitutive model, the Split Hopkinson Pressure Bar (SHPB) impact test with confining pressure for concrete was simulated in the software ANSYS/LS-DYNA. The confining pressure was simulated by applying constant pressure around the specimen. The triangle velocity wave, which has less diffusion, is used as loader in the simulation. The confining pressures used were 0MPa, 2MPa, 4MPa, 8MPa and 16MPa and the stress-strain curves were presented. The influence of confining pressure on the dynamic properties was analyzed by comparing the stress-strain curves of concrete under different stress states. The strain rate decreases sensitively as long as the confining pressure increases. By debugging the impact velocity, the stress-strain curves under the similar strain rate were obtained, which indicate the toughening and reinforcing effect with the increase of confining pressure.
Engineering Practice of Elasto-Plastic Time-History Analysis on Super High-Rise Using ABAQUS
Authors: Zhou Yu , Hong Song Ran , Chen Yong
Published: July 2014

As a general-purpose finite element program, ABAQUS’s strong non-linear calculation capacity make it especially suitable for elasto-plastic time-history analysis, in this paper, with a super high-rise project, the experience of elasto-plastic time-history analysis using ABAQUS is described, include the modeling process, material constitutive model, numerical integral method and evaluation of analysis results, some reference will be provided to the other engineering practices.
Establishing the Digital Model of Hydraulic System in Simulation Vibration Table
Authors: Li Rui , Li Xue Sen , Xu Hong
Published: July 2014

Based on the analysis of the development, defects and motion of present hydraulic system vibrating table, it is divided into several single disciplinary system modes which are organic related in this paper. Establishing unified digital model in integrated simulation environment through analyzing the function of these models, which will guide the design of digital vibration table system.
Analysis of the Flow Characteristics of Multiphase Flow Fields in the Mixing Agitator
Authors: Wang Xiao Bing
Published: July 2014

The numerical simulation for the flow characteristics of multiphase flow fields in the multiple-blade mixing agitator is carried out by means of combining of the large eddy simulation (LES) and multiphase flow model. Then the flow pattern changes and material mixing rule at different speed conditions are analyzed. The result shows that complicated circular flows form among the four groups of blades in the axial cross section. In the mixing process, the upper solid-liquid mixture is transported to the bottom of the agitator under the action of gravity and fluid shear. Finally it mainly distributes at the agitator walls and the inverted cone manifold in the center of the agitating shaft. With the gradually increasing in the agitation rate, there are a large amount of vortex structures near the blade. Then spiral vortex distribution areas are formed.
Model Reuse Technology in Building Electrical Parameters Design
Authors: Pu Hong Ke , Wei Qing Chao
Published: July 2014

Electrical design in a variety of electrical equipment needs to search, copy and modify constantly, so it is inefficient. Parametric design technology is the most common way to achieve rapid design, but less in the electrical design of the specific application. With the electrical equipment model parameterization and the reuse technology model, develop electrical equipment design software based on CAD secondary development. Use of software, design by three levels of reuse technology on the equipment for quick drawing, editing, statistics, to avoid duplication of work more efficiently, to improve design efficiency and reduce human waste.
Intelligent and Complex Monitoring in Intelligent Buildings
Authors: Volkov Andrey , Latyshev Konstantin
Published: July 2014

Conversion of intelligent buildings (IB) is based on a data search, data pattern recognition, data processing and storage of data of projects of intelligent buildings (IB), automated systems (AS) and theirs elements. Author developed a model of a system for data monitoring, allowing for analysis and synthesis of intelligent buildings conversion projects. An intelligent monitoring allows to analyze data both of projects and elements of IB and AS. Complex monitoring allows to synthesize the data used in elements of IB and AS. It is possible to create CAD system and monitoring system for IB and AS conversion using principles described in this article. Vendors of elements for intelligent buildings, vendors of software used in controllers, adapter, etc., can find opportunity to found open community and establish rules for “internet specification” for intelligent elements for AS. Modern state of technology in intelligent search encourages me to say about full-automatic search, assembling and installing of software updates for AS elements of IB. I see that we can use industrial MDM and hypersearch software widely used in big internet vitrines.
Numerical Analysis of Bridge Expansion-Induced Rail Deformation of Ballast Truck
Authors: Xiong Zhen Wei , Liang Xin Ling , Dai Xian Xing , Wang Ping
Published: July 2014

when the ballast track stretch with the bridge, ballast which is near expansion joint will move confusedly. As a result, rail produced vertical deformation. The deformation will affect the running safety and comfortability of train. At present, there are two kinds of treatments which are cover board structure and baffle structure to deal ballast’s movement. Aiming at the different modes of stretching when the two kinds of structures and different arrangement condition of bridge plate are applied, the rail-sleeper-ballast discrete element model is developed by the method of two-dimensional granular flow. The relationship between rail deformation and bridge expansion is analyzed on the foundation of the model. Results show as flows: when bridge extends or shortens, rail always produced upwarp deformation. Bridge plate should arrange asymmetrically. Like this, the rail deformation decrease by 40%. And adopting the baffle structure can effectively reduce the influence of bridge expansion in ballast truck.
Real-Time Dynamic Simulation System for Tunnel Construction Based on OpenGL
Authors: Li Qian
Published: July 2014

Comprehensively using the theories and techniques in connection with the tunnel engineering, geometric modeling, computer graphics, object-oriented method and software engineering, the authors in this paper have made research on the techniques for the three-dimensional solid modeling, tunnel realistic scene graphics rendering and tunnel construction real-time dynamic simulation and on the basis of the research, the authors developed an openGL-based real-time dynamic simulation system for tunnel construction. The application of the developed system to a practical tunnel shows that the system has very good vista of application in aspect of the progress control, organization and management of the tunnel construction.
Study on Multiple Points Matching in Different Images of Intelligent Building
Authors: Lin Zhi Ling , Dong En Zeng , Ju Peng
Published: July 2014

It is important for identifying the correspondences of points in different images. A double epipolar lines approach based on linear searching was proposed to identify the corresponding points in three images. First the component expressions of a given point epipolar equation were derived from the known epipolar model. Then the linear searching method was utilized to solve the problem of no analysis solutions since the numbers of state variables in these expressions were more than those of independent equations. Finally the target was found in looking for the corresponding points. The simulation shows it is effective.
3D Models as Vista Information Management Governance in the Field of Development of Underground Space in Cities
Authors: Belyaev V.
Published: July 2014

Considered especially the "underground city" in Russia on the example of the three largest cities in approaches to information management governance improvement of spatial development by building 3-d geological and geotechnical models and 3(D) the real estate cadastre.
Study on Deformation Property of Coarse Particles (Sulfate) Saline Soil with Field Test
Authors: Yang Peng , Liu Ya Feng , Mi Hai Zhen , Zhu Yan Peng
Published: July 2014

Salt expansion was the main diseases of the salty foundation. In order to study the deformation regularity and quantitative description of coarse particles saline soil ground in natural condition, a field test was conducted in Dunhuang area. The exploratory well with 7.5 m depth (deeper then annual temperature change layer) was excavated on site, and the data of salt content \water content \ground temperature \salt expansion rate were collected. From the test it was found that : salt expansion mainly decided by salt content, salt content and salt expansion rate have approximately a quadratic function relationship; the minimum salt content could cause soil expansion is 1.5‰; The salt expansion force was strong, and the gravitational stress could not suppress the deformation.
Test Study on Effects of Temperature, Sand Mix Ratios and Dry Density on Soil Water Characteristic Curves of Bentonite-Sand Mixtures
Authors: Fang Xiang Wei , Shen Chun Ni , Li Chun Hai , Wang Long
Published: July 2014

A series of tests on the soil water characteristic curve through moisture balance method were conducted to study the effects of temperature, sand mix ratios and dry density on the soil water characteristic curve of bentonite-sand mixture. The test results show that with the increase of temperature, the water retention capacity of the mixture significantly decreased. Within the test control suction range, sand mix ratios at the low suction had obvious effects on the soil water characteristic curve and at high suction the effects gradually decreased. Dry density had no effects on the soil water characteristic curve of bentonite-sand mixture. In accordance with the test data, an experience model of soil water characteristic curve of bentonite-sand mixtures considering temperature and sand mix ratios is established.
The Study on the Engineering Properties of Squeezed Branch Piles under Combined Load
Authors: Han Wei Feng , Feng Bin Bin , Zhou Jing , Lu Chen Yuan
Published: July 2014

In this article, we design an experiment about model piles to study their bearing capacity and deformation properties under uplifting load of different angles, model piles include the equivalent-diameter pile, the squeezed branch pile with single plate and the squeezed branch pile with two plates. The test shows, the bearing capacity of squeezed branch pile is higher than the equivalent-diameter pile, and its plates can resist the horizontal load on the top of pile better.
Centrifuge Model Study of High Strength Piles Composite Foundation Settlement & Instability under Embankment in Different Kind Soils by Different Pile Spacing
Authors: Wang Qing Jian , Zhang Shu Jie , Guo Chao , Lu Zheng Ran
Published: July 2014

A series of centrifuge model tests has been conduced to examine the behavior of high strength piles composite foundation stability under railway embankment in silt or clay or sand different kind of soils. The high strength composite foundation has a symmetrical plan layout consisting of 3×4, 4×6, and 5×8 piles with a center-to-center spacing of 6 or 4 or 3 times pile width. The piles are under the same height of railway embankment, with the same length, and on the same lying soil layer. The high strength composite foundation stability test results are expressed in terms of soils kinds-pile displacement response of the composite foundation, embankment load experienced by soil between piles and piles in the composite foundation, and bending moment profile along individual pile. It is established that the high strength composite foundation stability efficiency reduces significantly with decreasing of the strength of soil between piles in composite foundation. The tests reveal the shadowing effect phenomenon in which the marginal piles experienced larger laterally and bending moment than that of the central piles. The shadowing effect is most significant for the lead row piles and considerably less significant for subsequent rows of middle piles. The approach adopted by many researchers of taking the average performance of piles in the same row is found to be inappropriate for the middle rows, of piles for composite foundation as the outer piles in the row carrying significantly more laterally load and experience considerably higher bending moment than those of the inner piles.