基于平衡更新过程的既有桥梁车辆荷载效应模型

王 磊, 张建仁

中国公路学报 ›› 2008, Vol. 21 ›› Issue (5) : 50-56.

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中国公路学报 ›› 2008, Vol. 21 ›› Issue (5) : 50-56.
论文

基于平衡更新过程的既有桥梁车辆荷载效应模型

  • 王 磊, 张建仁
作者信息 +

Vehicle Load Effect Model for Existing Bridge Based on Equilibrium Renewal Process

  • WANG Lei, ZHANG Jian-ren
Author information +
文章历史 +

摘要

将不同车辆组成的车队等效成均布荷载, 假定车辆匀速行驶于桥梁上, 采用卷积公式计算不同车辆连续到达间距及总重的概率密度函数, 应用平衡更新过程理论推导车队长度概率函数, 依据中国现有车辆荷载统计数据, 建立了既有公路桥梁车辆荷载效应模型。该模型通过截尾分布限定其中各参数的最大值、最小值来反映不同交通类型, 通过影响线传递函数反映不同桥梁结构形式。研究结果表明:车辆间距、车长、车重及车速的分布是决定车辆荷载效应模型的关键;该模型适用于既有公路桥梁时变可靠性和剩余寿命评估。

Abstract

The motorcade consisted of various vehicles was equivalent to the uniform load. The vehicles were assumed to run in uniform velocity on the bridge. The probability density functions of total weight and spacing intervals for various continuous arrivals of vehicle were computed by the convolution formula. The equilibrium renewal process was used to deduce the probability density function of the motorcade length. Based on the existing vehicle load statistic data in China, the vehicle load effect model for the existing highway bridge was established. The traffic types were reflected by restricting the maximum and minimum values of some parameters based on the truncated distribution in this model. The bridge types were considered by the influence line transfer function. The study result shows that the distributions of vehicle length, spacing interval, vehicle gross weight, and vehicle velocity determine vehicle load effect. This model is suitable for the time-variant reliability and remaining life evaluation on the existing highway bridges.

关键词

桥梁工程 / 桥梁荷载 / 平衡更新过程 / 车辆荷载效应 / 截尾分布 / 卷积公式

Key words

bridge engineering / bridge load / equilibrium renewal process / vehicle load effect / truncated distribution / convolution formula

引用本文

导出引用
王 磊, 张建仁. 基于平衡更新过程的既有桥梁车辆荷载效应模型[J]. 中国公路学报, 2008, 21(5): 50-56
WANG Lei, ZHANG Jian-ren. Vehicle Load Effect Model for Existing Bridge Based on Equilibrium Renewal Process[J]. China Journal of Highway and Transport, 2008, 21(5): 50-56
中图分类号: U441.2   

参考文献

[1] NOWAK A S.Live Load Model for Highway Bridges[J].Structural Safety, 1993, 13(1/2):53-66.
[2]NOWAK A S, NASSIF H, DEFRAIN L.Effect of Truck Loads on Bridges[J].Journal of Transportation Engineering, 1993, 119(6):853-867.
[3]NOWAK A S, FERRAND D M.Truck Load Models for Bridges[C]//BLANDFORD G E.Structures 2004-Building on the Past:Securing the Future (Proceeding of the 2004 Structures Congress).Nashville:ASCE, 2004:1-10.
[4]CREMONA C.Optimal Extrapolation of Traffic Load Effects[J].Structural Safety, 2001, 23(1):31-46.
[5]GINDY M.Development of a Reliability-based Deflection Limit State for Steel Girder Bridges[D].Jersey City:The State University of New Jersey, 2004.
[6]MIAO T J.Bridge Live Load Models with Special Reference to Hong Kong[D].Hong Kong:The Hong Kong Polytechnic University, 2001.
[7]MIAO T J, CHAN T H T.Bridge Live Load Models from WIM Data[J].Engineering Structures, 2002, 24(8):1071-1084.
[8]O'CONNOR A, O'BRIEN E J.Traffic Load Modelling and Factors Influencing the Accuracy of Predicted Extremes[J].Canadian Journal of Civil Engineering, 2005, 32:270-278.
[9]CRESPO-MINGUILLON C, CASAS J R.A Comprehensive Traffic Load Model for Bridge Safety Checking[J].Structural Safety, 1997, 19(4):339-359.
[10]CROCE P, SALVATORE W.Stochastic Model for Multilane Traffic Effects on Bridges[J].Journal of Bridge Engineering, 2001, 6(2):136-143.
[11]FU G K, HAG-ELSAFI O.Vehicular Overloads:Load Model, Bridge Safety, and Permit Checking[J].Journal of Bridge Engineering, 2000, 5(1):49-57.
[12]MEI G, QIN Q, LIN D J.Bimodal Renewal Processes Models of Highway Vehicle Loads[J].Reliability Engineering & System Safety, 2004, 83(3):333-339.
[13]VU K A T, STEWART M G.Structural Reliability of Concrete Bridges Including Improved Chloride-induced Corrosion Models[J].Structural Safety, 2000, 22(4):313-333.
[14]KOBZA J E, SHEN Y C, REASOR R J.A Stochastic Model of Empty-vehicle Travel Time and Load Request Service Time in Light-traffic Material Handling Systems[J].IIE Transactions, 1998, 30(2):133-142.
[15]DITLEVSEN O.Traffic Loads on Large Bridges
Modeled as White-noise Fields[J].Journal of Engin-eering Mechanics, 1994, 120(4):681-694.
[16]DITLEVSEN O, MADSEN H O.Stochastic Vehicle-queue-load Model for Large Bridges[J].Journal of Engineering Mechanics, 1994, 120(9):1829-1847.
[17]李广慧, 张存超, 王东炜, 等.高速公路桥梁活荷载参数研究[J].郑州大学学报:工学版, 2005, 26(1):20-23.
LI Guang-hui, ZHANG Cun-chao, WANG Dong-wei, et al.Study on Live Load Parameter for Highway Bridge[J].Journal of Zhengzhou University:Engin-eering Science, 2005, 26(1):20-23.
[18]杨伟军, 梁兴文, 张建仁.服役桥梁评估荷载分析[J].中南公路工程, 2002, 27(3):31-33.
YANG Wei-jun, LIANG Xing-wen, ZHANG Jian-ren.Analysis on Evaluation Loads on Service Bridges[J].Central South Highway Engineering, 2002, 27(3):31-33.
[19]索清辉, 钱永久, 张 方.对公路桥梁剩余寿命评估时可变荷载取值的研究[J].中国工程科学, 2004, 6(5):52-55.
SUO Qing-hui, QIAN Yong-jiu, ZHANG Fang.Study of the Variable Load While Estimating Existing Bridge Structure[J].Engineering Science, 2004, 6(5):52-55.
[20]GB/T 50283—1999, 公路工程结构可靠度设计统一标准[S].
GB/T 50283—1999, Unified Standard for Reliability Design of Highway Engineering Structures[S].
[21]贺拴海, 吕颖钊.考虑材料耐久性的在役混凝土结构可靠度研究[J].建筑科学与工程学报, 2005, 22(1):71-75.
HE Shuan-hai, LU Ying-zhao.Reliability Research of Existing Reinforced Concrete Structures[J].Journal of Architecture and Civil Engineering, 2005, 22(1):71-75.
[22]王 磊, 张建仁.既有公路桥梁不同车辆荷载连续到达过程模拟[J].中外公路, 2008, 28(2):83-88.
WANG Lei, ZHANG Jian-ren.Simulation on Different Vehicle Continuous Arrivals on Existing Highway Bridges[J].Journal of China & Foreign Highway, 2008, 28(2):83-88.
[23]刁元盛.积分变换——工程数学[M].广州:华南理工大学出版社, 2003.
DIAO Yuan-sheng.Integral Transformation-Engin-eering Mathematics[M].Guangzhou:South China University of Technology Press, 2003.
[24]梁之舜, 邓永录.随机点过程及其应用[M].北京:科学出版社, 1998.
LIANG Zhi-shun, DENG Yong-lu.Stochastic Point Process and Its Application[M].Beijing:Science Press, 1998.

基金

国家自然科学基金项目(50478032);国家西部交通建设科技项目(2006 318 000 19);
湖南省应用基础研究计划重点项目(06FJ2008)
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