bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study on Axially-Loaded Concrete Columns with Various Sizes Confined by CFRP
Authors: Long Yue Ling , Zhu Jiang
Published: September 2013

Eight concrete columns with various sizes confined by CFRP and four plain concrete columns as the control specimens were axially loaded to failure in order to investigate size effects in concrete columns confined by CFRP. Experimental results show that CFRP can increase considerably both the capacity and ductility of the concrete specimens. Furthermore, the peak stress of the unconfined concrete decreases with the size of the specimens increasing. Similarly, the peak stress of confined concrete decreases with the size of the specimens increasing when the lateral confining stresses are the same. Hence, the size effects should be considered in the stress-strain model of concrete confined by CFRP.
Numerical Simulation of Pressure Distribution around the Reticulated Shell Structure with Large Span
Authors: Yuan Zi Hou , Yuan Yi Chen , Sun Wei
Published: September 2013

In order to investigate the pressure distribution around the reticulated shell structure with large span, a commercial Computational Fluid Dynamic software Fluent is employed to obtain the wind load and the coefficients of the time averaged pressure distribution around the reticulated shell structure in this paper. The numerical simulations of surface pressure are consistent with the experimental results. The characteristics of the wind pressure distribution are described through the flow analysis around the reticulated shell structure. All these discoveries can be used as a reference for the new version of the wind load criteria.
Finite Element Analysis of Holes on the Metal Lamp Pole
Authors: Zhao Qian , Wang Jin Sen , Zheng Su Min
Published: September 2013

Metal lamp pole is widely used in road lamp. The structure of the metal lamp pole is more and more complex. It needs to open holes on the metal lamp pole. To determine bearing capacity and safety properties of the lamp pole after opening hole, this paper used ABAQUS software to make finite element analysis of the metal lamp pole and accurately got the deformation and stress of metal lamp pole. By means of comparing the stress situation of the metal lamp pole with and without holes, it summaries up the influence rules of holes on the mechanical behavior of metal lamp pole. There is an obvious stress concentration phenomenon around holes and the influence degree of different holes location of stress concentration is also different. Through finite element simulation analysis, it meets the project safety and provides reference value for optimization design of lamp pole.
Reliability Assessments of Concrete Filled FRP Tube Columns
Authors: Zhou Ying Wu , Xing Feng , Sui Li Li
Published: September 2013

This paper has investigated the reliability of concrete filled FRP tube columns using the FRP confined concrete theory developed recently by the authors. The reliability index of the column is assessed by Monte Carlo method. The importance of the use of partial safety factors of FRP and concrete in the reliability design of concrete filled FRP tube columns is studied. The results indicate that the reliability index of concrete filled FRP tube columns increases remarkably as the FRP partial safety factor increased. It is concluded that the FRP partial safety factor is independent on the coefficient of variation of FRP strength but is highly sensitive to the coefficient of variation of concrete strength especially in the case of low confinement ratio. Considering the actual situation in engineering applications, to reach a target reliability index of 3.5, a partial safety factor of 1.4 is finally recommend for both FRP and concrete.
Reliability Studies on Concrete Filled FRP Tube Columns Using Different Design Code Models
Authors: Zhou Ying Wu , Sui Li Li , Xing Feng
Published: September 2013

The paper presents an in-deep reliability study on concrete filled FRP tube columns using four well-known design codes which include the ACI 4402R-08, the CNR-DT200, UK code (TR55) , and the Chinese code. Monte Carlo method is utilized to calculate the reliability index of the column. The simulation results reveal that the reliability index depends heavily on the design code and the ACI 4402R-08 design code is found to be the most reliable one for the design of concrete filled FRP tube columns. The variation of the unconfined concrete strength has remarkable influences on the reliability of the column while the variation of the FRP tensile strength can hardly affect the reliability. Consequently, it is concluded that the partial safety factor for concrete or the FRP proposed in existing design codes may be suitably enhanced in order to make up the reliability loss due to the increment of the variation of concrete.
Applications of Rayleigh Wave Detection Technique and Polymer Grouting Technology in Waterproof Construction
Authors: Chen Jing Yi , Ummin Okumura , Yu Tao , Qi Yu Jie
Published: September 2013

The underground water seepage is always the key and difficult point in waterproof engineering. Aiming at the characteristics of underground engineering waterproof, this paper describes how to make use of Rayleigh wave detection technology to detect leakage in underground works, and find disease location through the analysis of the dispersion curve, and then combine Rayleigh wave detection technology with polymer grouting technique grouting on the disengaging position, to achieve the effect of waterproof plugging. Research results show that through combining Rayleigh wave detection technique and the combination of polymer grouting technology, it is quicker and more convenient to manage underground leakage defects, which satisfies the project need and has wide application value and social benefits.
Nonlinear Finite Element Analysis for Wall-Beam Structure
Authors: Tian Wei , Guo Xue Dong , Yin Xin Sheng
Published: September 2013

Wall-beam is widely applied to civil engineering structure. By using of the finite element method, the nonlinear finite element analysis is taken on to get the force transfer mechanism of wall-beam, strain distribution of wall-beam and prestressed wall-beam is compared. The study on strain distribution of different depth-span ratio is carried on. The conclusion in the paper is the academic support for crack resistance of wall-beam.
Finite Element Analysis and Reinforcement of Gravity Abutments Cracking
Authors: Tian Wei , Guo Xue Dong
Published: September 2013

Cracking is a common problem existing in highway bridge abutments. Combing with projects, cracking reasons of one oblique U-type gravity abutment are analyzed by using a large and commonly used finite element software-FEM in this paper; in addition, preventive methods are put forward which can act as references for designing and constructions.
Dynamic Analysis on the Light-Weight Portal Frame with Different Slopes
Authors: Peng Yao , Huang Jun , Dai Shao Bin , Yuan Ting
Published: September 2013

Build up a group of light-weight portal frame models with different slopes by SAP2000 software. Conduct dynamic time-history analysis on light-weight portal frame models with different slopes under the EI Centro wave. The results show that: The maximum positive and negative displacement and acceleration of the light-weight portal frame presents a variation rule as the the slope increasing; the influence of the slope on the maximum positive and negative displacement of the frame is relatively small, while it is big on the maximum positive and negative acceleration; the acceleration amplification coefficient of the frame decreases as the slope increasing when the slope exceeds a limit, which show that the earthquake damage of the large slope light-weight portal frame increases as the slope increasing.
Dynamic Interaction between the Pile Groups and Layered Poroelastic Half Space to Harmonic Axial Loads
Authors: Chen Xue Jia , Xu Man Qing
Published: September 2013

By using Mukis method, the dynamic interaction between the pile group and layered poroelastic half space subjected to axial harmonic loads is investigated in this study. By using Mukis method, the second kind of Fredholm integral equations describing the dynamic interaction between the layered half space and the pile group is constructed. Numerical solution of the integral equation yields the axial force, the displacement of the pile as well as the response of the layered poroelastic half space. Results of this paper are compared with known results, which shows that our solutions is in a good agreement with the known result. The numerical results of this study also demonstrate that the soil inhomogeneity has a significant influence on the response of pile group.
Three-Dimensional Flow Simulation Research on Spur Dike
Authors: Xu Hui , Zhang Ming , Zhang Wan Qi
Published: September 2013

A three-dimensional (3D) flow mathematical model has been applied to simulate the flow field around spur dikes. In the vertical plane, the z-coordinate was adopted, and the additional layer was used to track the free water surface. The standard k-ε model was adopted, additionally, wall function and large coefficient method was applied to treat the boundary of the spur dike. Simulated results of velocity distribution, turbulent kinetic energy and its dissipation rate around the spur dike agree well with the experimental data.
Experimental Study on Two-Side Constraint Steel Plate Shear Wall with Vertical Stiffeners
Authors: Mu Zai Gen , Zhang Fu Jian , Shang Qing Yuan , Li Li Ming
Published: September 2013

Two two-side constraint steel plate shear wall specimens with vertical stiffeners had been tested under low cyclic loading to study its seismic performance through the performance indexes of the Initial stiffness, hysteretic behavior, load-carrying capacity, destruction mechanism and so on. Test showed that as main lateral force resisting members two-side constraint steel plate shear wall with vertical stiffeners had a very superior seismic performance. So it is worth popularizing in the area of high seismic intensity.
Modal Identification and Finite Element Model Updating by Adding Known Masses
Authors: Deng Chang , Hu Shao Wei , Gu Pei Ying
Published: September 2013

This paper focus on the model updating of civil structural systems. Traditional modal test method can identify the frequency of the civil structure accurate, but it is difficult to identify the mass-normalized mode shape. By adding a series of known masses to the structure, measuring the frequency of this mass-modified system, and only using this set of frequency data, the mass-normalized mode shape of the structure can be identified. And the model updating method was developed, which constructed an objective function through the frequency of the measurement and the FE model, corrected the FE model's parameters to minimize the objective function. The example was included to show the capabilities of the technique. The finite element model of the fixed-free beam was updated by the dynamic characteristics which was identified from the modal test, the results show that updated results coincided with the experience of the analyst.
Progressive Collapse Resistance of RC Structures with Tension Cables
Authors: Wang Tie Cheng , Li Zhi Ping , Zhao Hai Long
Published: September 2013

In this study, three tie force models of a 10-storey concrete frame structure were prepared to investigate the effects of these methods on the resistance of frame structures against progressive collapse. Four cases of different first-storey column removed were considered using nonlinear static analysis method and their performances were compared with each other. From the nonlinear static analysis, the tie force methods in DoD 2005 and DoD 2009 cannot improve progressive collapse resistance of the structure because horizontal cables don't play a full role. X-type tension cables provide alternative load paths after loss of a single column, and improve progressive collapse resistance of the structure. The X-type tie force model remained in stable condition after sudden removal of a corner column, an exterior column, or an interior column in the first storey.
The Effect of Alternative Reinforcement Details in Reinforced Concrete Coupling Beams
Authors: Park Wan Shin , Chun Young Soo , Yun Hyun Do , Seo Soo Yeon , Song Jin Gyu , Lee Hyun Ho
Published: September 2013

In this study, a design alternative for reinforced concrete (RC) coupling beamswith diagonal headed-bars that puts less reliance on diagonal reinforcement wasexperimentally investigated. The results show that specimen HB 50 exhibits a better stable behavior incomparison with specimens CON and HB 30. Test results showed that specimens HB75 with replacement ratio of 75 % diagonal headed – bars were efficient inresisting high shear load.
Study of Bracing Force Acting at Mid-Span of Beam of Single-Span Portal Frame
Authors: Jia Wen Wen , Wang Deng Feng
Published: September 2013

The brace at the mid-span of beam of portal frame provides lateral constraint and improves its overall stability. By the nonlinear finite element method, the influences of structural parameters on the required bracing force for the beam bearing ultimate load were investigated when only one brace acting on the upper flange of beam at mid-span. The bracing force is correlated to the failure mode and configuration of beam of portal frame. The failure of beam trends to be controlled by the strength and the required bracing force increases when the stiffness of column increases. The required bracing force corresponding to the beam subjected to the ultimate load increases when the span of beam or the width of beam flange increases. The research work can be used as reference for the brace design for beam of portal frame.
Effect of Slenderness Ratio on Inelastic Buckling and Residual Strength of H-Section Steel Column Member
Authors: Abebe Daniel Yeshewawork , Kim Jin Woo , Jang Jeong Hyun , Choi Jae Hyouk
Published: September 2013

This study presents the effect of slenderness ratio on inelastic buckling behavior and residual strength of H-section steel column member under axial compression loading. Both end pinned H-section steel column constraining rotation on the weak and strong axis was studied. When column members subjected to unexpected compression load (other than design load) will buckle if the applied load exceeds the critical load that induces buckling. To evaluate the effect of slenderness ratio and the influence of constraining rotation in different axis on the structural behavior of H-section steel column member, explicit nonlinear FEM analysis were carried out with reasonable accuracy. To verify the nonlinear finite element analysis, compression test was conducted and both inelastic deformation and the relationship between load-displacement curves were compared. The cumulative energy curve calculated from the load-displacement relationship curve has also been compared and satisfactory result was obtained. From the analysis result the part total energy (the total energy absorbed by the flanges and web) for the two constrain conditions was presented. Furthermore, based on the deflection theory, the relationship between load and displacement was also proposed.
Analysis on Mechanical Properties of the Integral Jacking-Up of an Ancient Building
Authors: Wang Tie Cheng , He Yu Hang , Zhao Hai Long
Published: September 2013

The underpinning plate is the main load-bearing structure in the integral jacking-up process of ancient building. The deformation and mechanical properties of the underpinning plate have impact on the stability and the safety of the whole integral jacking-up process. The deformation and mechanical properties of the underpinning plate in the loading stage and after the partial unloading stage are analyzed with ANSYS in the integral jacking-up process of a certain ancient building. It is shown that the deflection of the prestressed underpinning beam satisfies the requirement of the design code in the loading stage and after the partial unloading stage, the concrete at the bottom of the underpinning edge beam will not crack in the loading stage and the concrete at the bottom of the underpinning edge beam will crack after the partial unloading stage.
Reliability Evaluation of Double-Layer Spherical Lattice Shell
Authors: Li Hui Jun , Wang Zheng Zhong
Published: September 2013

Reliability and sensitivity of double-layer spherical lattice shells are extensively investigated, moreover the effect of different types of random variables and different positions of random variables on reliability and sensitivity are also studied in detail. External loads, cross-sectional area and yield strength of members are defined as random variables respectively according to their types and layouts in the lattice shells, and their effects on sensitivity are substantially calculated. Effect of random variables on several performance functions is also studied. Finally, correlations among these performance functions are calculated.
Pre-Tension Control Technology of Monolayer Cable Net Fixed by Elastic Structure Anchor
Authors: Sima Yu Zhou , Tan Zhi Cheng
Published: September 2013

The elastic structure of the anchor-fixed monolayer cable net generates elastic displacement under pre-tension, so the designed tension of the cable can be consistent after repeated test and it is difficult to control in later construction. For this case, we get causes for elastic displacement based on comprehensive analysis, simulate and analyze it by using displacement compensation tension method to compute all initial tensions once time and guarantee consistent designed tensions after elastic distortion of a cable. We make the construction sequence and record the force and tension of each cable after it is strained in place based on computed initial pre-tension in order to monitor if the distortion is reasonable in tension and guarantee in-place tension in construction once time without repetition.
Space Rigid Frame Damage Identification Based on Finite Element Method and Experiment
Authors: Jia Hong Yu , Yue Peng Fei , Fang Zhi Hua
Published: September 2013

The finite element model of space rigid frame with no damage and damage were established by ANSYS and the physical model experiment was carried out. The damage identification methods include that variety rate of three-dimensional vibration mode, curvature mode, strain energy of element mode and axial mode shape difference. Consider identify result and measurement cost that the axial mode shape difference is a good label amount for three-dimension damage identification by vibration method and the single damage and combination damage could identified, which it was proved by the experiment result.
Study on Earthquake Resistant Performance of a Large Span Structure Strengthened with HADAS
Authors: Chen Dai Guo , Yao Yong , Deng Yong Jun , Wang Hai Jun
Published: September 2013

Seismic fortification intensity has been adjusted in some areas which were affected in The Wenchuan-earthquake. It was seismic strengthening for most of the buildings especially the public buildings after the adjustment. In order to ensure the seismic performance of the structure after reinforcement ,the analysis method based on performance is gradually applied in the large and complex engineering structure analysis .The paper uses a large span Sports Training Center under construction as background. According to the situation that the fortification intensity by 6 degrees improved to 7 degrees ,the paper uses Push-over method to analysis elastic-plastic of the finite element models ,which including the mild steel damper before and after reinforcement ,under the action of the rare earthquake of 7 degrees. The paper is studying the internal force,deformation and destruction of the structure in the action of the rare earthquake,comparing the dynamic characteristics and seismic performance of the models, and researching distribution of weak links and plastic hinge of the models under the large earthquake. The results show that the models can meet collapse resistant checks less than 7 degrees of the rare earthquake before and after reinforcement. The second floor is relatively weak of the original structure,and can emerge local damage easily. But the structures stiffness is more uniformly after reinforcement, and has large resistance of the collapsed ability.
Calculation and Analysis of Temperature Stress for Large-Span Steel Structure
Authors: Dai Su Juan , Lv Cun , Chen Qing
Published: September 2013

This paper has conducted the study on calculation of temperature stress for general constrained flexural members under temperature variation in view of the method of structural mechanics, and analyzed the temperature stress of an industrial workshop of large-span steel structure under frequent temperature conditions combined with the climate characteristics of Qingdao city, come to the conclusion that temperature stress should be considered. This conclusion provided a certain reference for the same type industrial building of large-span steel structure.
Testing and FEM Analysis of Geogrid-Reinforced Retaining Wall's Earth Pressure
Authors: Lv Peng , Yang Guang Qing , Liu Jie
Published: September 2013

Earth pressure is the main factor for retaining walls stability. To study the distribution regulation of earth pressure in geogrid-reinforced retaining wall, in-situ test has been carried out on an experimental wall and analyzed by finite element method. The numerical result fits well with the test data that prove the reliability, the paper analyze the influence for earth pressure distribution caused by factors of geogrid as: stiffness; length; spacing, and the weight density of filling material.
New Simulation Method of Reinforcement Simulation in FEA
Authors: Huang Wen Xiong , Tan Li Ying
Published: September 2013

During the research of local stress distribution of polyline pretensioned beams by 3-D nonlinear finite element method, a problem of curve prestressed reinforcement simulation is discovered. If the line of prestressed reinforcement is curve, the calculated result of local stress distribution is greatly affected by element size, because of the tectonic stress concentration by the coupling between the linear element and body element. Then, the validity and applicability of the model couldn't be judged. To eliminate the harmful effect, the curve prestressed reinforcement is determined to simulate by body element. The result shows that it will solve the problem thoroughly, and the calculated result is truthful and reliable. This research presents a new thought and method about the local stress analysis of the prestressed concrete structure.
Research on Initial Stiffness of Top-and-Seat Angle Connections in Semi-Rigid Steel Frames
Authors: Li Guo Hua , Qi Cheng Zhi , Luo Jian
Published: September 2013

Top-and-seat angle connection is a type of semi-rigid connection, usually used in steel frame. The initial stiffness of top-and-seat angle connection is an important index for steel frame design. The article studied the initial stiffness of the connection considering the influence of column flange. The deformation and mechanical characteristics of top-and-seat angle connection were analyzed using ANSYS. According to the results of FEM analysis, theoretical models of the connection and the initial stiffness formula of connection were proposed. For verifying the correction of the formula, 8 FEM models were built and initial stiffnesses were calculated correspondingly. The formula proposed by the article agreed well with the results of the FEM analysis. And it proves that, the initial stiffness formula of top-and-seat angle connection proposed herein can be used in the design.
Analysis of Bending Strength of the Rectangular Hole Honeycomb Beam
Authors: Dai Su Juan , Zhu Bao Chen , Chen Qing
Published: September 2013

This paper introduces the characteristics and practicability of the honeycomb beam and analyses the mechanical behavior. Based on the vierendeel truss theory, the normal stress calculation method of the rectangular hole honeycomb beam is discussed, and the calculation formula is deduced. Finally using the derived formula, the paper calculates the normal stress of the rectangular hole honeycomb beams with different parameters, and analyses the influence of the opening rate and the hole spacing on the strength of honeycomb beam by comparing the same section of solid web beam, thus, provides reference for design of steel honeycomb beam.
Weighting of Performance Index by Analytic Hierarchy Process for Water Supply Enterprises
Authors: Sun Wan , Wang Jun Ling , Feng Cui Min , Cao Ping , Han Wei
Published: September 2013

The performance index system weighting of urban water supply was determined by using analytic hierarchy process. Firstly, the water supply performance index system class hierarchy was established, and then the expert scoring was conducted, the judgment matrix established, and the qualitative index quantified. Secondly, the eigenvector analytic hierarchy was sorted, and then, the indicators weights were determined. Therefore, the weight coefficient of index system by analytic hierarchy process is objective and applicable, and lay a good foundation for the performance evaluation.
Evolvement and Characteristic of Urban Spatial Structure in Baotou
Authors: Qin Xiao Dong , Liu Da Peng
Published: September 2013

Baotou is an important industrial city developing during the modern times. Because of the effect of industrial layout, turban spatial structure has a different evolvement track and some special morphology characteristics from other cities. This paper analyses the evolvement of urban spatial structure in Baotou, and summarizes the city spatial structure characteristics, show that is the continuation of "Shuangcheng structure" model, extended along the traffic line, space structure based on industrial layout.
The Influences of the High-Rise Buildings to Urban Space Morphology in Chongqing
Authors: Gan Shi Yuan
Published: September 2013

Describes implication of urban space morphology, and analyzes the positive influences of the High-rise Buildings to Chongqing Urban Space Morphology from the aspects of Saving land, Reflecting the characteristics of mountainous city, Making the city has a sense of identity, Making people contacts and exchanges more convenient, Relieving the psychological pressure of people properly, and Analyzes The Negative Influences from the aspects of Physical, Social and Psychological Influences, particularly, the Light Pollution, Wind environment Pollution, acoustic Environment Pollution and Thermal environment influence of physical aspects, and The Influences on urban transport, urban space and the safety of social aspects.
The Characteristics of Traffic Accident Perpetrators in China and Countermeasure Analysis
Authors: Zou Jun Jun , Sun Chuan Jiao
Published: September 2013

In the context of rapid increase in car drivers and all citizens being drivers, the driving experience of traffic accident perpetrators has showed a shorter trend. The driver is an important factor that influences the traffic accident, and the drivers behaviors such as speeding, driving on wrong lane and others are the main factors causing traffic accidents. As for the human factor influencing the traffic safety, it is very important to conduct road safety education and publicity work.
Short-Time Fluctuation Characteristic and Combined Forecasting of High-Speed Railway Passenger Flow Based on EEMD
Authors: Jiang Xiu Shan , Zhang Rui Feng , Pan Liang
Published: September 2013

Take Wuhan-Guangzhou high-speed railway for example. By adopting the empirical mode decomposition (EMD) attempt to analyze mode from the perspective of volatility of high speed railway passenger flow fluctuation signal. Constructed the ensemble empirical mode decomposition-gray support vector machine (EEMD-GSVM) short-term forecasting model which fuse the gray generation and support vector machine with the ensemble empirical mode decomposition (EEMD). Finally, by the accuracy of predicted results, explains the EEMD-GSVM model has the better adaptability.
Simulating Impacts of Variable Accident Sites on Freeway Weaving Section Traffic Flow in Cellular Automation Model
Authors: Kong Lin Peng , Li Xing Gang
Published: September 2013

As a typical traffic bottleneck, the freeway weaving section is one source of vehicle conflict and an accident-prone area. This paper presents a cellular automaton model to characterize accident-induced traffic behavior around the weaving section, in which different accident sites are considered. The spatial-temporal profiles are presented after the numerical simulation. It is shown that the accident car not only causes a local jam behind the accident car, but also causes vehicles to cluster in the bypass lane. The accident occurring in lane 1 (the left lane) in the weaving section are more inclined to cause traffic jam and the decrease of traffic capacity than in lane 2 (the right lane). Furthermore, the curves of saturated flux of weaving section against different accident sites are given. It is found that the capacity of weaving section will decrease fastest when the accident is located in the downstream of weaving section.
Analysis Research of Delay of Signalized Intersection Based on VISSIM Simulation Software
Authors: Xu Xiu Hua , Ge Zheng Yi , Gao Chao
Published: September 2013

Delay is an important indicator for the evaluation of service level of urban road intersection and vehicle traffic efficiency. Taking Fu Xing Road and Xi Cui Road intersection for example, the thesis uses the spot sample method and VISSIM5.0 simulation method to compare and analyze the delay of this intersection. And the thesis verifies the feasibility, accuracy and practicality to analyze the delay of intersection using the VISSIM simulation method.
An Improved Expert Intelligent PID Control in Maglev Transportation System with Different Track Irregularities
Authors: Song Rong Rong , Ma Wei Hua , Chen Zi Li
Published: September 2013

Track irregularity is one of the most important aspects of the suspension control performance impact in Magnetic Transportation System (MTS). By using the traditional PID control, the problem was that it was difficult to confirm the PID parameters and have long settling time, even appear the chaotic phenomenon. However, using Expert PID(EPID) control method producesd over-fitting to initial assignments, local optimum induced easily and slow convergence rate problem. Based on the global optimization feature of PSO algorithm, it had been adopted to optimize the initial values of Expert PID control. An intelligent control algorithm for the maglev transportation system was put forward based on Expert PID optimized by Particle Swarm Optimization algorithm (EPID-PSO). The expert rule was that if the absolute value of the error trended to decrease, the PID current control keeped its maintenance; if not, then the PID current control applied strong functions. Under this rule, the dynamic error was reduced and the performance of track irregularity was improved. Simulation results by MATLAB proves that the control scheme has good robustness, shorter adjustment time, faster response time, achieving better quality of control under the three conditions of step signal, low frequence sine wave signal and high frequence square wave signal.
Research on the Traffic Pattern in City Residential Area in View of "Compact City" Concept
Authors: Song Min
Published: September 2013

This paper takes the concept of Compact City as a way to solve the housing and environmental issues. Based on the analysis of the current problems of road system in Chinas residential areas, this paper discusses the road system from the aspects of foundation of design, main body direction, content and space form from the angle of design of road system in the residential area. Four basic characteristics of road system have been summarized and an ideal model of traffic pattern in city residential area has been set up.
Research on the Value and Comprehensive Development of Adjacent Land of Urban Rail Transit
Authors: Li Zhao Yu , Cao Shi Chao , Su Wei
Published: September 2013

On the basis of the traffic cost model and the land value function model, this paper analyzes and reveals the interaction of the urban rail transit construction and the surrounding land price. It also illustrates the feasibility and the necessity of the comprehensive development of adjacent land of urban rail transit.
Comparative Study on Urbanization Level of Six Central Provinces Based on Matter-Element Extension Theory
Authors: Wang Ya Kun
Published: September 2013

Nowadays, urbanization becomes a hot spot and the evaluation of urbanization becomes an important part of urban management. Based on the urbanization development status of central region of China, considering the indicators impact on the urbanization level and using the matter-element theory, an extension evaluation model of urbanization is set up in this paper, which is used in the comparison of urbanization level in central China. The practicality of model is verified through the case and the management measures to improve the urbanization level is proposed through analysis the correlation function, while some reference for urban development of various regions in China is offered.
Study on Interaction Land Use and Road Traffic of Zhongyuan Urban Agglomerations
Authors: Li Li Hui , Su Cong Cong
Published: September 2013

The present situation the problems of land use and road traffic of Zhongyuan Urban Agglomerations have been studied by using system analysis method and the literature material method. Analysis indicates that the construction of the Zhongyuan Urban Agglomerations bring the change of land structure and layout, although has made remarkable achievements, road construction are not fully meet the demand of the land use rapid development. In order to achieve the integrated goals that road transportation and land use Zhongyuan Urban Agglomerations should planning of road traffic and land use overall, to promote the integration of land use by transport pilot model, guide surrounding towns development with regional transportation channel.
Evaluation of Satisfaction Degree for Public Transportion Based on Matter Element Model
Authors: Jie Yu , Tong Wen
Published: September 2013

The group eigenvalue method and extension set theory were used to assess the comprehensive evaluation of the satisfaction degree for the public transportion. Analyzing the factors that influence the satisfaction degree of public transportion, it puts forward the evaluation index system of satisfaction degree. In order to determine effectively the satisfaction degree, used the group eigenvalue method to decide the index weight, and the matter element model of satisfaction degree for public transportion was constructed. Finally, the scientificity and rationality of the evaluation method was detected by application example, according to the evaluation result, carried on the corresponding analysis.
Photodegradation of Chlorobenzenes in Micellar Aqueous Solutions of Gemini Surfactants
Authors: Wang Zheng Hua , Yang Xu Ming , Ren Bo Zhi
Published: September 2013

Photodegradation of 1,2,4-trichlorobenzene (1,2,4-TCB) was examined in one kind of Gemini surfactant solution (ethylene dioctadecyl dimethyl ammonium bromide) and two kinds of conventional surfactant solutions (sodium dodecyl sulfate and polyoxyethylene polyoxypropylene ether). Compared with conventional surfactants, Gemini surfactants make up of two identical or different amphiphilic moieties connected by a spacer group. Under UV irradiation at 254 nm, 1,2,4-trichlorobenzene was decomposed in the three micellar solutions, but the photodegradation rate of 1,2,4-trichlorobenzene in the Gemini surfactant solution was 3.54% and 11.81% higher than those in other two conventional surfactant solutions respectively. Thus, the photochemical reactions of chlorobenzenes can be enhanced in Gemini surfactant solutions.
Models and Evaluation for Urban Traffic Carrying Capacity
Authors: Gao Shan Shan , Yuan Zhen Zhou
Published: September 2013

This paper studies on the status of urban traffic development by analyzing traffic carrying capacity. The concept, characteristics and influencing factors of urban traffic carrying capacity is researched. This paper establishes one quantitative model based on the time-space consumption model, especially taking the reuse coefficient of road resources, reduction coefficient caused by intersections, and integrated utilization coefficient of road network into consideration. And put forward evaluation index which is the level of traffic carrying capacity. Moreover, the evaluation standard and some strategies for improving traffic carrying capacity are provided.
Analysis of Rail Transit Station Passenger Capacity Based on System Dynamics
Authors: Li Xiao Hong , Zhang Wan Di , Chen Feng , Li Zhi Qiang
Published: September 2013

Passenger capacity of rail transit station is not only the basis of station design and passenger flow organization, but also an important factor to ensure safety operation of rail transit. This paper analyzes urban rail transit station from the perspective of system, and discusses the coordination and feedback relationships of passenger flow distribution between different facilities. By analyzing the law of the passenger flow, a system dynamics simulation model is established with the system dynamics software, Stella, and the limits of passenger capacity of Beijing Dongdan station is calculated under different conditions. These results provide bases for the management of transit operation.
The Application of Gray Relational Analysis Based on the OWA Operator in the Road Network Evaluation of Development Zone
Authors: Lin De Hua , Yuan Zhen Zhou
Published: September 2013

The development zone, which consists of freight traffic mostly and a few part of passenger traffic, and which forms of area traffic flow in the internal zone, and which has the significant characteristic of external transport playing an important role, has the different road network evaluation with other general cities. This paper, connecting with the traffic planning characteristics, constructs highway network evaluation indexes of development zone both at the structural performance and the running quality of road network. Moreover, this article, on the basis of the analyses of the comprehensive evaluation methods and the characteristics of evaluation index system, creates the road network evaluation model of development zone that is the gray relational analysis based on the OWA operator to determine the combination weight using the AHP and Entropy as the basis methods. Finally, by the empirical research, it verifies the feasibility and scientific of the evaluation indexes and method.
The Analysis of Demand Characteristics of Passenger Transportation Based on BP Neural Network
Authors: Liao Yong , Wu Tao
Published: September 2013

To quantitatively analyze travelers preference under different influence factors on transport mode, the thoughts of orthogonal design is introduced into optimizing questionnaires without the loss of information. Combined with stated preference survey method, data related to travelers preference are collected. In order to analyze survey data scientifically and roundly, BP neural network is used. By taking non-investigated options as inputs, BP neural network can figure out the scores of all options which are not be surveyed. At last a numeric example demonstrates the use of BP neural network in the analysis of demand characteristic of passenger transposition is valid and feasible.
Chaotic Characteristics Identification on Terminal Departing Passenger Traffic Time Series
Authors: Zhang Ya Ping , Guo Yuan Yuan , Wei Yu , Cheng Shao Wu , Xing Zhi Wei
Published: September 2013

On the basis of actual survey of departing passengers to reach terminal, chaotic time series prediction theory was adopted for data analysis in this paper. In order to find out the self-similarity of time series, this paper divided passenger traffic into two kinds: holiday traffic and non-holiday traffic by changing interval scale. The optimal delay time and the best embedding dimension had been calculated by using time series phase space reconstruction method. To confirm whether the time series have chaotic characteristics or not, it took the largest Lyapunov exponent as determining criterion.Then the optimal time intervals of passenger traffic time series with chaotic character were determined. The study provides a theoretical basis for the application of chaos theory in passenger traffic forecast.
Forecasting the Section Passenger Flow of the Subway Based on Exponential Smoothing
Authors: Wang Yan Hui , Jin Jun , Li Man
Published: September 2013

Facing the typical big city is into the network operation ,currently, it brings some difficulties without the section traffic data obtained in real time to monitor and limit measures. To solve the problem, this paper adopts the second exponential smoothing models based on the historical data at the same period, and forecasts the subway section passenger flow. In this paper, the data is collected a section traffic in Beijing Subway from every Monday to every Friday in March 2013, and the former periods are used as the sample data, and predicts the last day, and compares them with the known data to check error. The result shows the method has a strong practical utility.
Characteristics of Straw Biochar and its Influence on the Forms of Arsenic in Heavy Metal Polluted Soil
Authors: Jiang Jin Ping , Yuan Xian Bin , Ye Li Li , Liao Shu Chang , Zhang Xue Hong
Published: September 2013

The objective of the study was the determination of the characteristics and the potential of remediation As polluted soil of three different biochars and straws. Results showed that biochar has better properties and microstructure for heavy metals remediation. Short-term incubation remediation experiments showed that biochars could decreased biological toxicity and mobility of As.
Research on Safety Evaluation Indexes of the Road Transportation Enterprise of Dangerous Goods
Authors: Dong Qian , Qian Da Lin , Li Cheng Hua , Fan Hai Bo
Published: September 2013

By using the accident causing theory and system safety engineering theory, factors structure affecting the enterprise production safety was obtained. Comprehensively considering enterprise qualification management, transportation organization, employees and accidents, a multi-level safety evaluation index system is built, according to the relevant regulations and current situations of the road transportation enterprise of dangerous goods.
A Parking Vehicle Detection Algorithm Using Magnetic Sensor
Authors: Zhang Zu Sheng , Yuan Hua Qiang , Chen Liang
Published: September 2013

In this work, a parking vehicle detection algorithm using magnetic sensor is proposed. Eighty-two sensor nodes are deployed to evaluate the performance of the algorithm. By running the system for more than one year, we observe the vehicle detection accurate rate is better than 98%.
Study on Trip Generation of Residential Quarters in Suzhou
Authors: Li Xin Yu , Zhu Yu Jiao , Li Chao Yang
Published: September 2013

Studying on the trip generation of residential quarter is the basis of traffic forecasting, traffic design and people-oriented traffic environment. Taking the typical motorization city - Suzhou as an example, this paper analyzes the trip generation of persons and vehicles by collection large number of survey data. It also focuses on discovering some relations between peak hour trips and floor area, with the purpose of providing some illuminating ideas in the sustainable development of the residential quarters in China.
Network Cabling Problems in Highway Toll System Discussion
Authors: Jia Xu , Liu Yu Xin
Published: September 2013

The cable is the whole network system foundation and the beginning of LAN installation period. According to statistics, about 50% ~ 70% network faults are caused by cable, so the cable quality and installation quality will affect the network healthily directly. This paper introduced the network cabling project and the common problem and attentions in the construction period. Then the advantages and disadvantages of various transmission mediums were analyzed.
Established Methods of Space between Expressway Work Zones Based on Delay of Expressway
Authors: Wu Ke Man , Zhong Lian De
Published: September 2013

Via microscopic traffic flow simulation, based on the theory of traffic capacity and queue delay of vehicles on work zones and relying on the Reconstruction and Widening of Fekai Expressway, the paper gives suggested values of minimum space between adjacent work zones in the same direction under different traffic volumes and traffic compositions for references, during the construction of a two-way-8-lane highway with half road way closed. The result can promote work zone traffic safety.
Detection Criteria and Reliability Analysis of Highway Closed Circuit Television
Authors: Liu Yu Xin
Published: September 2013

Closed circuit television (CCTV) monitoring system is used to control traffic and facilitates. In this paper the logical structure of the CCTV system is introduced first. Then the system composition is recommended. Finally the main detection items of CCTV channel, system reliability and maintainability analysis are introduced in details.
The Korteweg-De Vries Equation of a New Lattice Model with a Consideration of the Next-Nearest-Neighbor Site and its Numerical Simulation
Authors: Xu Yang , Yuan Zhen Zhou , Tian Jun Fang
Published: September 2013

Based on Nagatanis model, a new lattice hydrodynamic model of traffic flow with a consideration of the next-nearest-neighbor site is proposed. Using nonlinear analysis, we derive the Korteweg-de Vries (KdV, for short) equation near the neutral stability curve to describe the density waves. Numerical simulations are consonant with the analytical results and shows that the consideration of the next-nearest-neighbor interaction helps suppress traffic jam.
A Quick Offset Optimization Method for Traffic Signal Coordination
Authors: Bie Yi Ming , Wang Lin Hong , Liu Zhi Yuan
Published: September 2013

To develop a quick offset optimization mehtod for traffic signal coordination scheme, the calculating methods for common cycle length and green split are brought forward firstly. Based on the vehicle delay model under isolated traffic control mode, the progression factor is introduced to improve the model. Then the relationship between progression factor and offset is derived. Minimizing average vehicle delay is selected as the optimization objective, the function with simple structure between the objective and offset is developed. At last, take two adjacent signalized intersections as example, the optimizaiton method is validated and the results show that the method is effective.
Study on Safety Evaluation of Flammable Solid Railway Transportation Based on the Bayesian Network
Authors: Li Feng Xu , Yang Yue Fang
Published: September 2013

Taking the fact that the fire explosion is the major danger during the transportation of flammable solid into account, the paper proposes a Fault Tree (FT) model about fire explosions affected greatly by packing, loading and unloading, vehicles, management and other factors, and converts the FT model into Bayesian Network (BN) one for quantitative analysis. Finally, the paper uses the data based on the BN model to prove that the model and algorithm are feasible.
Detecting Research for Vehicles Track at Roundabout Based on Dual Data Source
Authors: Jin Long , Liu Xiao Xia , Fan Shao Feng , Liu Bo Hang
Published: September 2013

Extracting vehicles track at roundabout is the basis research for motion characteristics of vehicles. At present, most of the vehicle trajectory was obtained by using single data source. However, the precision of the method needs to be improved. In this paper, two cameras are set at two different directions shooting the same scene image to obtain image data. And then a new method to extracted vehicles track more accurately by integrate the dual data source organically was proposed. In the case analysis, through the contrastive analysis of 4 different curves, the result shows that the error of dual data detection is decreased by 2.7% than single data detection. The method to extract vehicles track by dual data source can provide the theoretical support for the analysis of traffic conditions at roundabout.