西南交通大学学报

Stochastic Seismic Response Analysis of Large-Span Cable-Stayed Bridge Subjected to Multi-dimensional and Multi-support Excitations

ZHENG Shixiong, ZHANG Jin, JIA Hongyu, ZHANG Keyue, KANG Rui

2014, 27(5): 747-753. doi: 10.3969/j.issn.0258-2724.2014.05.001

[Abstract](1116)

Abstract:
In order to investigate the stationary random response of large-span cable-stayed bridge under seismic excitations, a large-span cable-stayed bridge was employed for numerical simulation, and a three-dimensional finite element model in ANSYS software was used to study the response of large-span cabl...

Determination of Fabrication Dimensions of Steel Box Girders in Cantilever Construction

ZHAO Lei, JIA Shaomin, YANG Xingwang

2014, 27(5): 754-759. doi: 10.3969/j.issn.0258-2724.2014.05.002

[Abstract](910)

Abstract:
In order to effectively determine the fabrication dimensions of steel box girders to ensure the smooth erection of main beam and make the profile upon completion state meet design requirements, a new method to calculate fabrication dimensions was established by using the calculation results of const...

Vortex-Induced Vibration of Continuous Steel Box-Girder Bridge with Variable Cross-Sections at Typical Erection Stages

QIN Hao, LIAO Haili, LI Mingshui

2014, 27(5): 760-765,786. doi: 10.3969/j.issn.0258-2724.2014.05.003

[Abstract](1112)

Abstract:
In order to investigate the vortex-induced vibration performances of a long-span continuous steel box-girder bridge during erection to propose effective mitigation measures, the erection of a six-span continuous variable cross-section steel box-girder bridge was regarded as an engineering example. I...

Analytical Method for Calculating Dynamic Response of Coupled Train-Bridge System Based on Duhamel Integral

QIAO Hong, XIA He, DU Xianting

2014, 27(5): 766-771. doi: 10.3969/j.issn.0258-2724.2014.05.004

[Abstract](980)

Abstract:
In order to shorten the computation time of solving the dynamic response of a coupled train-bridge system, the modal decomposition method is used to decompose the train subsystem and bridge subsystem in the coupled system. Assuming that the vehicle-bridge interaction forces change linearly within ea...

Aerodynamic Characteristics of Tapered Tall Buildings with Square Section

ZHANG Zhengwei, QUAN Yong, GU Ming, XIONG Yong

2014, 27(5): 772-778. doi: 10.3969/j.issn.0258-2724.2014.05.005

[Abstract](1040)

Abstract:
Square tall buildings with different taper ratios were tested using the high frequency force balance (HFFB) technique in two different simulated wind fields. The effects of taper ratio, turbulence intensity and wind direction on aerodynamic base moment and torque coefficients, the power spectrum den...

Fire Resistance Performance of Concrete-Filled Steel Tube RC Square Columns under Axial Loading

XIANG Kai, WANG Guohui

2014, 27(5): 779-786. doi: 10.3969/j.issn.0258-2724.2014.05.006

[Abstract](1088)

Abstract:
In order to research the fire resistance performance of concrete-filled steel tube reinforced concrete (CFSTRC) square columns under axial loading, fire resistance tests of four CFSTRC square columns subjected to axial load were conducted. The effects of axial loading level, steel tube area ratio an...

Design Method for Multi-frame Beams with Anchor Bolts Used to Stabilize High Soft-Rock Slope

XIAO Shiguo, ZHANG Tengfei, CAO Xingsong, ZHOU Depei, LIU Shixiong

2014, 27(5): 787-792. doi: 10.3969/j.issn.0258-2724.2014.05.007

[Abstract](892)

Abstract:
In order to avoid the disadvantages of the existing design methods for multi-frame beams with anchor bolts used to stabilize high soft-rock slopes, a novel design method was proposed on the basis of interaction mechanism between a structure and a slope. With the proposed method, tensile forces of an...

Model Experiment Study of Continuous Track Slab Tension Cracks

ZHAO Pingrui, YAN Jianhua, WANG Kejiang, WANG Dong, LI Wei, WANG Jiawei

2014, 27(5): 793-798. doi: 10.3969/j.issn.0258-2724.2014.05.008

[Abstract](979)

Abstract:
To investigate the thermal cracking patterns in continuous ballastless track and verify the rationality of its thermal force determination method, several reinforced concrete specimens were built to model the continuous track slab and base plate which was widely used in China's high-speed railways. ...

Least Squares Adjustment and Accuracy Estimation in Multiplicative Error Models

SHI Yun

2014, 27(5): 799-803. doi: 10.3969/j.issn.0258-2724.2014.05.009

[Abstract](896)

Abstract:
To probe into the parameter estimation in multiplicative error models, three least squares (LS) adjustment methods, i.e., the LS method, the weighted LS method and the bias-corrected weighted LS method, in multiplicative error models were discussed based on the existing researches and using the leas...

Analysis of Dynamic Damage of Airport Rigid Pavement under Pickaxe Machine Breaking Load

YUAN Jie, WANG Long, LUO Yong, YAN Qikun, TAN Yue

2014, 27(5): 804-810. doi: 10.3969/j.issn.0258-2724.2014.05.010

[Abstract](1129)

Abstract:
In order to determine the technical parameters for airport rigid pavement demolition reasonably, a finite element model of rigid pavement was established using the ABAQUS software, and a half-sine impact load was imposed on the rigid pavement to analyze its dynamic responses under pickaxe machine br...

Travel Time Computation and Optimal Path Selection Algorithm of Urban Expressway Network

YAN Maode, CHANG Nannan, ZHANG Changli

2014, 27(5): 811-816. doi: 10.3969/j.issn.0258-2724.2014.05.011

[Abstract](1077)

Abstract:
In order to improve the overall functionalities and utilities of urban expressway network, a travel time computation and optimal path selection algorithm was proposed for urban expressway network by utilizing the dynamic traffic data acquired along expressway segments in real time. According to the ...

Driver's Trajectory Tracking Model in Curves of Two-Lane Highway

WANG Wanqiu, QIAN Yubin, LIN Yu

2014, 27(5): 817-823. doi: 10.3969/j.issn.0258-2724.2014.05.012

[Abstract](880)

Abstract:
Considering the complexity of horizontal alignment in curves, and the uncertainty of steering behavior resulting from drivers' fuzzy perception and subjective tendency, the control factors of steering behavior were introduced by analyzing drivers' driving characteristics which are influenced by road...

Method for Analyzing Characteristics of Travel Behavior Based on Minimum Determinant of Asymptotic Variance-Covariance

REN Ting, CHEN Lin, YANG Fei, YAN Qipeng

2014, 27(5): 824-830. doi: 10.3969/j.issn.0258-2724.2014.05.013

[Abstract](926)

Abstract:
In order to overcome the low precision of the model estimation results in the existing stated preference (SP) experimental designs, a new experimental design method for SP survey was proposed. This method aims to minimize the determinant of asymptotic variance-covariance (AVC) matrix to compute iter...

Simulation Method for Couplers and Buffers in Train Collision Calculations

XIAO Shoune, ZHANG Zhixin, YANG Guangwu, ZHU Tao

2014, 27(5): 831-836. doi: 10.3969/j.issn.0258-2724.2014.05.014

[Abstract](1052)

Abstract:
In order to study the behaviors of couplers and buffers (CABs) accurately in the process of train collision, a new simulation method for analyzing the characteristics of CABs was proposed based on the discrete beam in LS-DYNA. This method was then verified through a case study where a head to head c...

Reliability Optimization Design of Vehicle Variable Stiffness Spring Assembly by Fuzzy Theory

WANG Hong, TANG Jinsong, LIU Wanxuan

2014, 27(5): 837-841. doi: 10.3969/j.issn.0258-2724.2014.05.015

[Abstract](929)

Abstract:
In order to improve the design quality of spring assembly, a fuzzy reliability optimization design model of variable stiffness spring assembly was established using the fuzzy and the reliability design theory based on traditional optimization design method. In this model, the spring stress and stren...

Small Fault Detection and Classification Method for Complex Production Process

ZHANG Min, CHENG Wenming, LIU Juan

2014, 27(5): 842-847. doi: 10.3969/j.issn.0258-2724.2014.05.016

[Abstract](834)

Abstract:
In order to monitor the condition of a complex production process, based on the multivariate statistical process control and support vector machine theory, the cumulative control chart principle was extended to multivariate form for data preprocessing, and the principal component analysis (PCA) was ...

Microstructure and Fatigue Performance of Electron Beam Welded Joints of AZ31B Magnesium Alloy

WANG Wenxian, MA Zhengzheng, ZUO Congjin, XU Haiying, FU Pengfei, CUI Zeqin, YAN Zhifeng

2014, 27(5): 848-854. doi: 10.3969/j.issn.0258-2724.2014.05.017

[Abstract](799)

Abstract:
In order to improve the microstructure and mechanical properties of magnesium alloy welded joints, a 10 mm thick AZ31B magnesium alloy plate was welded by the electron beam welding (EBW). The microstructure, element distribution, and phase composition of the EBW joints were then analyzed, and their ...

Simulation of Interactions between Pores and Cracks inside Fusion Welded Aluminum Alloys

WU Shengchuan, YU Cheng, ZHANG Weihua, XUE Biyi

2014, 27(5): 855-861. doi: 10.3969/j.issn.0258-2724.2014.05.018

[Abstract](916)

Abstract:
In order to investigate the influence of interactions between cracks and pores within fusion welded aluminum alloys on the performance of the joints, polygonal elements each embedded with a single elliptical hole or multi cracks were constructed based on the hybrid polygonal element (HPE). Then, a p...

Metallurgical Structure and Mechanical Properties Test of Weld-Joint of Industrial Pure Zirconium

HU Xiaodong, JIANG Di, LI Yajiang

2014, 27(5): 862-868. doi: 10.3969/j.issn.0258-2724.2014.05.019

[Abstract](923)

Abstract:
The element distribution, metallurgical structure and mechanical properties in different parts as base-zone, heat-treatment zone, and welded seam in butt-jointed seam of industrial pure zirconium R60702 welded with TIG was analyzed using optical microscope, electron probe and micro-hardness tester t...

Analysis of Temperature Field of Resin Matrix Composite Patches during Curing Process

CHEN Shuxian, WANG Yuantao, YANG Wenfeng, LI Meng, QIN Wenfeng, TANG Qingru

2014, 27(5): 869-874. doi: 10.3969/j.issn.0258-2724.2014.05.020

[Abstract](998)

Abstract:
In order to optimize the curing parameter of resin matrix composite patches, a physical model and a mathematical model for composite laminate patches during thermal curing process were established by finite element method. Based on these models, numerical simulations were made to study the variation...

Vector Control of Seven-Phase Induction Motor with Harmonic Currents Elimination

GUO Jiling, XIAO Jian, QIU Zhongcai, LUO Peng

2014, 27(5): 875-881. doi: 10.3969/j.issn.0258-2724.2014.05.021

[Abstract](868)

Abstract:
In order to control the flux and torque and eliminate harmonic status currents of seven-phase induction motors simultaneously, three methods were proposed according to the principle of reducing the harmonic subspace composite voltage vectors in the space decomposition model. These methods included t...

A Novel Method for Fast Smoothing Transition of Arterial Coordination Control Plans

GUO Haifeng, PENG Qitao, CHENG Jun, ZHANG Jue

2014, 27(5): 882-887. doi: 10.3969/j.issn.0258-2724.2014.05.022

[Abstract](881)

Abstract:
In order to eliminate disturbances caused by traffic signal transition and ensure smooth traffic flow in dynamic coordination control system, in view of transition time and smoothing characteristics, a fast smoothing transition method was proposed based on the optimization of offset adjustment. This...

3D Pavement Crack Image Detection Based on Anisotropy Measure

PENG Bo, WANG Kelvin C.P., CHEN Cheng, JIANG Yangsheng

2014, 27(5): 888-895. doi: 10.3969/j.issn.0258-2724.2014.05.023

[Abstract](1074)

Abstract:
In order to detect cracks precisely and completely, a novel automatic cracking detection algorithm based on 1 mm/pixel 3D pavement images was proposed with three core parts: anisotropy measure calculation and self-adaptive threshold optimization, depth verification and multi-resolution denoising pro...

Analysis of Conflict Characteristic between Early Right-Turning Vehicles and Pedestrians at Signalized Intersections

CHEN Yongheng, ZHANG Hu, QU Zhaowei, CAO Ningbo

2014, 27(5): 896-903. doi: 10.3969/j.issn.0258-2724.2014.05.024

[Abstract](1187)

Abstract:
Vehicles turning right early at signalized intersection was prone to be blocked by the vehicles that go straight when they travel in a mixed lane shared by both right-turning and straight-going vehicles and are not directed by a signal. Based on traffic flow characteristics in the mixed lane and the...

Intelligent Monitoring Technologies for Railway Signaling Systems in China

LIU Dawei, GUO Jin, WANG Xiaomin, CHEN Jianyi, YANG Yang

2014, 27(5): 904-912. doi: 10.3969/j.issn.0258-2724.2014.05.025

[Abstract](1918)

Abstract:
The state of the art in the monitoring technologies for railway signaling systems in China was introduced. By analyzing the drawbacks of these technologies in interconnection, data sharing, intelligent analysis and prediction, as well as their development trend and maintenance requirement, a scheme ...

Fast Method for 2D Threshold Segmentation Algorithm Based on Inter-class and Intra-class Variances

LIU Jin, JIN Weidong

2014, 27(5): 913-919. doi: 10.3969/j.issn.0258-2724.2014.05.026

[Abstract](1091)

Abstract:
In order to shorten the running time of 2D threshold segmentation algorithm, a fast implementation of 2D Otsu was developed. First, a two-dimensional optimal threshold (s*,t*) was split into two one-dimensional optimal thresholds, s* and t*. The intra-class variance was defined to propose a new opti...

Novel PV/Li-Ion Energy Storage System Based on Non-balancing Cell Management

PENG Fei, LIU Zhixiang, CHEN Weirong

2014, 27(5): 920-927. doi: 10.3969/j.issn.0258-2724.2014.05.027

[Abstract](845)

Abstract:
A novel topology of an energy storage system composed of PV panels and lithium-ion batteries was presented. For the individual module of the proposed system, the energy coupling between the photovoltaic panel and lithium-ion cell is achieved with the designed control unit. Besides, with the structur...

Effect Mechanism of Multi-scenarios Terminal Capacity Based on Flow Decomposition Barrier

LI Yinfeng, HU Minghua, PENG Ying, WANG Hongwei

2014, 27(5): 928-934. doi: 10.3969/j.issn.0258-2724.2014.05.028

[Abstract](877)

Abstract:
In order to investigate the influence factors and variation trends of terminal capacity, a capacity network model for terminal area was built using the flow decomposition barrier theory according to the terminal area characteristics, in which the length of routes, flight speed, control separation, a...

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2014 Vol. 27, No. 5