西南交通大学学报

2019, 54(5): 1-2.

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3D Seismic Vulnerability Analysis of Bridge Structural Components Based on Reliability

SHAN Deshan, GU Xiaoyu, DONG Jun, LI Qiao

2019, 54(5): 885-896. doi: 10.3969/j.issn.0258-2724.20170881

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In order to evaluate the near-field seismic performance of bridge structures, a three-dimensional (3D) seismic vulnerability analysis process for bridge components is established. Based on the reliability theory of engineering structures, 3D failure surfaces of the components are used to characteriz...

Seismic Response Analysis of High-Pier Bridge under Near-Fault Multiple Pulse Record Excitation

ZHENG Shixiong, CHEN Zhiqiang, CHEN Zhiwei, LI Xi

2019, 54(5): 897-907. doi: 10.3969/j.issn.0258-2724.20170725

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The multiple pulse effect of near-fault seismic records on the nonlinear seismic response of high pier railway bridges (HPRB) was investigated. First, three representative groups of seismic records, namely, single pulse record (SPR), multiple pulse record (MPR) and none pulse record (NPR) were selec...

Dynamic Response Influences of Combination Loads of Wind, Wave, and Current on Sea-Crossing Bridges

FANG Chen, LI Yongle, XIANG Huoyue, ZHANG Jingyu

2019, 54(5): 908-914, 922. doi: 10.3969/j.issn.0258-2724.20170716

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To investigate the wind, wave, and current loads and their combination influences on sea-crossing bridge, the joint committee on structural safety (JCSS) combination model was used to combine the wind, wave, and current loads considering the correlations among wind, wave, and current. The Gumbel joi...

Numerical Simulation of Wind Characteristics at Bridge Sites in Complex Mountainous Terrains

WU Lianhuo, ZHANG Mingjin, LI Yongle, WEI Kei

2019, 54(5): 915-922. doi: 10.3969/j.issn.0258-2724.20180029

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In order to investigate the variation of spatial characteristics of the wind field at bridge sites in complex terrains, a mountainous terrain was built in FLUENT to simulate wind field characteristics. The Lvzhi River Bridge located at a gorge area in the southwest of China was chosen as the enginee...

Mechanical Behavior and Structural Optimization of Steel-Concrete Composite Cable-Pylon Anchor

XIAO Lin, LIU Lifang, WEI Xing, LIU Dejun

2019, 54(5): 923-930, 944. doi: 10.3969/j.issn.0258-2724.20170320

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Full-size model test and nonlinear finite element analysis (FEA) are carried out to investigate the mechanical behavior and optimize the structure design of the steel-concrete composite cable-pylon anchor of Jiayue Bridge, Chongqing. The mechanical performance and load transfer mechanism of the stee...

3D Shrinkage and Creep Effects of Concrete Under Varying Temperature Environment

YANG Yongqing, LI Shiwei, LI Xiaobin, YU Qu

2019, 54(5): 931-936. doi: 10.3969/j.issn.0258-2724.20170256

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In order to analyze shrinkage and creep effects of concrete exactly, based on the three-dimensional (3D) characteristics of shrinkage and creep, the shrinkage and creep effects of concrete under an ambient temperature environment were analyzed. A 3D shrinkage and creep effects mechanical model for c...

Experimental Study on Bonding Performance Between Rebar and Coarse Aggregate Ultra-High Performance Concrete

ZHAO Canhui, LI Haodao, DENG Kailai

2019, 54(5): 937-944. doi: 10.3969/j.issn.0258-2724.20170513

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To investigate the bonding performance between the reinforcement and coarse aggregate UHPC（ultra-high performance concrete）, six sets of pulling out specimens were tested. The effect of reinforcement diameter, cover layer thickness, and anchorage length were quantitatively studied, and further analy...

Stress Characteristics and Failure Mechanisms of Plain Concrete Piles of Composite Foundation under Embankment

HUANG Junjie, SHI Xiaona, SU Qian, WANG Wei, WANG Wubin

2019, 54(5): 945-952, 988. doi: 10.3969/j.issn.0258-2724.20180251

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In order to reasonably analyze the stability of embankment supported on composite foundation with plain concrete piles in soft clay area, centrifugal model tests and simulation analyses were conducted to study the stress characteristics of the piles with different spacings under embankment, and a on...

Large Shaking Table Test on Seismic Response of Site with Tilted Interlayer

CAO Licong, ZHOU Yuzhe, MA Donghua, LIU Feicheng, ZHANG Jianjing

2019, 54(5): 953-961. doi: 10.3969/j.issn.0258-2724.20170748

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To investigate the dynamic response of a complex site with a tilted interlayer and provide a potential reinforcement for the site, a large-scale shaking table model test was done to study the acceleration, strain and displacement responses of the site. The effects of the interlayer on the stability ...

Analysis of Flow Characteristics of Asymmetric Cam-Rotor Double Stator Pump

WEN Desheng, LIU Chunxiao, WANG Lei, ZHENG Wei, ZHAO Zhengpeng

2019, 54(5): 962-970. doi: 10.3969/j.issn.0258-2724.20170723

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A new type of asymmetric cam-rotor double-stator vane pump was developed to deal with the shortcomings of traditional hydraulic pumps. Two inner and outer stators and one rotor are arranged in the casing of the vane pump, in which the numbers of protrusions inside and outside the rotor are different...

Layout Optimization of Spatial Rigid Frame by Second-Order Effect Analysis

LI Yinqi, CHENG Wenming, LIU Huasen

2019, 54(5): 971-979. doi: 10.3969/j.issn.0258-2724.20170863

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In order to handle three-dimensional spatial frame layout optimization, nonlinear rigidity matrix of the beam-column element with seven degrees of freedom was deduced by second-order elastic theory, while the geometric nonlinearity and restrained torsional warping were considered. An overall second-...

Site Selection Method of Booster Substations by Integrating Fuzzy Analytic Hierarchy Process with 3D Geographic Information System

ZHU Qing, CHEN Kaizheng, XIE Xiao, ZENG Haowei, ZHANG Yeting, REN Xiaochun

2019, 54(5): 980-988. doi: 10.3969/j.issn.0258-2724.20170887

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In order to overcome the limitations of the traditional selection method of booster substations on wind farms and realize an efficient and low-cost site selection of booster substations, feasibility analyses of candidate sites selected for booster substations are conducted in 3D geographic informati...

Adaptive Web 3D Visualization Method for Diverse Terminals

ZHANG Yunhao, ZHU Jun, LI Weilian, HU Ya, LIU Mingwei

2019, 54(5): 989-996. doi: 10.3969/j.issn.0258-2724.20180399

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With the rapid development of mobile Internet, terminals of 3D GIS (geographic information system) applications have become more and more diverse. The current web visualization methods can hardly meet the requirements of diverse terminals. To solve this problem, an adaptive visualization architectur...

Simulation Analysis and Verification on Three-Dimensional Temperature Field of Strain Clamps for Overhead Lines

DONG Xuanchang, QU Fengrui, LI Yanfei, WANG Yiqing

2019, 54(5): 997-1004. doi: 10.3969/j.issn.0258-2724.20180610

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In order to study the temperature distribution of the strain clamps of overhead lines under different conditions, the finite element model based on the simplified structure of the strain clamp was build, and under the conditions of 600 A power frequency alternating current and different contact resi...

Technology for Virtual Reference Station Service with Gradient Information of Spatially Correlated Errors

ZHANG Xi, CHEN Xianchun, FENG Wei, ZHANG Jingjing, BAO Hai

2019, 54(5): 1005-1011. doi: 10.3969/j.issn.0258-2724.20180140

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Traditional virtual reference station (VRS) service usually needs to change VRS frequently and depends on internet communication heavily in long-distance positioning or positioning throughout the area. In order to overcome these deficiencies, a technology was proposed to realize the differential dat...

Efficient Compression Algorithm for Improving Visual Quality ofWeak Targets in High Precision Images

LI Ying, LI Bo, GAO Xinbo

2019, 54(5): 1012-1020. doi: 10.3969/j.issn.0258-2724.20180180

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In order to effectively compress high precision images, and ensure desirable fidelity of weak target area of the reconstructed image, a high precision image compression algorithm based on error optimization coding is proposed to improve the quality of weak target area. First, the JPEG-LS (joint phot...

Seismic Collapse-Resistant Performance of Stone Houses in Tibetan and Qiang Autonomous Prefectures of Western Sichuan

XU Hu, DU Ningning, YU Zhixiang, QIAO Yangkai

2019, 54(5): 1021-1029, 1046. doi: 10.3969/j.issn.0258-2724.20180441

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Traditional stone houses in the Tibetan and Qiang autonomous prefectures of Western Sichuan, deserve preservation as indicators of cultural heritage; however many of them have been damaged during earthquakes in recent years. Based on the characteristics of masonry materials and architectural layout,...

Prestress Loss Identification Method Based on Influence Matrix in Truss Structure

LIU Yanhui, ZHANG Yangyang, LIU Junxiao, REN Peng, ZHUO Biao

2019, 54(5): 1030-1037. doi: 10.3969/j.issn.0258-2724.20180107

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In order to calculate the real-time prestress loss of prestressed strands according to the observed deformation of prestressed truss structure, a prestress loss identification method based on displacement influence matrix is proposed. By finite element analysis, the relationship between the prestres...

Verification of Theoretical Model and Vibration Effect Caused by Blasting in Shallow Buried Tunnel on Mountain Slope

YAN Jian, HE Chuan, ZHANG Jing, SUN Zheng

2019, 54(5): 1038-1046. doi: 10.3969/j.issn.0258-2724.20170839

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Results on the blasting vibration effect and influence range of a mountain tunnel under a slope terrain and shallow buried soil in rock composite stratum conditions are presented. The objective was to verify and obtain an accurate and applicable theoretical model of vibration velocity based on a cas...

Temperature Field Law in Cold Region Tunnels and Insulation Effect of Air Curtain

GAO Yan, GENG Jiying, JIA Chao, ZHOU Jun, ZHU Yongquan, HE Benguo, ZHONG Yongqiang

2019, 54(5): 1047-1054. doi: 10.3969/j.issn.0258-2724.20170295

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Only laying thermal insulation layer in the tunnel portal section can not completely solve the frost damage problem in cold regions. Therefore, a new air curtain insulation system for cold region tunnels is proposed, a calculation model for temperature field in cold region tunnels subjected to train...

Influence of Vent Location on Efficiency of Smoke Extraction in Tunnel Fire

LIN Peng, WANG Guoyuan, SI Youliang, WANG Zhongkuan, WU Fanyu, GAO Dongli, MEI Xiujuan

2019, 54(5): 1055-1062, 1112. doi: 10.3969/j.issn.0258-2724.20170945

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To study the influence of smoke vent location on smoke extraction efficiency for semi-transversal smoke control system in long tunnel, a 1∶20 reduced-scale tunnel model was built on the basis of Memorial Tunnel. The model has a dimension of 42.7 m × 0.45 m × 0.23 m, with two gradients of 0% and 3.2%...

Present Situation and Prospect of Evacuated Tube Transportation System

DENG Zigang, ZHANG Yong, WANG Bo, ZHANG Weihua

2019, 54(5): 1063-1072. doi: 10.3969/j.issn.0258-2724.20180204

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As a new type of transit system, the evacuated tube transportation system, combining magnetic levitation train technology and low-air-pressure tube technology, theoretically decreases friction and aerodynamic drag of high-speed trains as much as possible. In order to promote the evacuated tube trans...

Origin and Solution of Pre-crash Speed Calculation Error

ZHANG Jian, ZHANG Xin, LI Jiang

2019, 54(5): 1073-1078. doi: 10.3969/j.issn.0258-2724.20170562

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In accident analysis vehicle collision model based on the momentum conservation is solved by the inverse algorithm to calculate pre-crash speed accurately. Then post-crash speed is calculated by a kinematics formula with survey data from accident scene, and is used to calculate the pre-crash speed b...

Parameter Matching and Multi-objective Optimization of Fuel Cell Hybrid System

LI Qi, MENG Xiang, CHEN Weirong, ZHANG Guorui

2019, 54(5): 1079-1086. doi: 10.3969/j.issn.0258-2724.20170117

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With the requirements of tram dynamic performance fulfilled, the weight and volume of the fuel cell hybrid system are optimized by the parameter matching method. Firstly, the vehicle dynamic model is built, and three peak powers are obtained, which corresponds three operational modes of trams includ...

High-Speed Ballasted Railway Track Lateral Resistance Characteristics and Reinforcements

JING Guoqing, JIA Wenli, FU Hao, LU Wei

2019, 54(5): 1087-1092. doi: 10.3969/j.issn.0258-2724.20170480

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Ballast flight commonly occurs in high speed ballasted railway tracks, and the probability of ballast flight increases with the decrease of shoulder height; thus, reduced shoulder heights or flat shoulders are used in some countries, which result in lateral resistance reduction. The influence of sho...

Urban Road Network Design with Balance between Vulnerability and Reliability

LÜ Biao, LIU Yiliu, LIU Haixu

2019, 54(5): 1093-1103. doi: 10.3969/j.issn.0258-2724.20180812

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Under normal events, travelers have route choice behaviors with risk aversion while under abnormal events, their route choice behaviors have a feature of both risk aversion and regret aversion. For this reason, an urban road network design model is constructed. It is a bilevel programming model with...

Vehicle Routing Problem with Pick-up and Delivery under Dynamic Travel Times

LI Manman, LU Jian, ZHANG He

2019, 54(5): 1104-1112. doi: 10.3969/j.issn.0258-2724.20170488

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A two-stage method of optimization and adjustment was applied to solving vehicle routing problem with pick-up and delivery under dynamic travel times in an actual urban network. In optimization stage, according to the recurrent congestion information, a genetic algorithm was used to solve time-depen...

Temporal Constraint Scheduling Algorithm for Periodic Data of Ethernet-Based Train Communication Network

JIAN Jie, WANG Lide, NIE Xiaobo, SHEN Ping

2019, 54(5): 1113-1120. doi: 10.3969/j.issn.0258-2724.20180006

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Instead of time intervals as the only constraint in message scheduling for industrial Ethernet, a temporal constraint scheduling table generation method for periodic packet data of Ethernet-based train communication network (TCN) is proposed. Firstly, network and message model are modified by time-t...

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2019 Vol. 54, No. 5