为了弥补中国在超高车辆撞击桥梁上部结构领域研究的不足,完善其工程设计方法,在超高车辆撞击桥梁上部结构的事故案例调查和精细化有限元分析的基础上,提出了超高车辆-桥梁上部结构撞击的简化计算模型,建立了简化模型的微分方程组,利用数值试验的方法确定了简化模型中的部分参数,从而得出简化计算模型的撞击荷载;为了满足工程设计的需要,在简化模型的基础上提出了形式简单的撞击力设计公式,以表格的形式给出了设计公式中基本参数的主要取值,并将简化模型和设计公式的计算结果与有限元结果进行了比较。结果表明:根据简化模型和设计公式计算得到的撞击荷载与精细有限元模型的计算结果吻合较好,且偏于安全,可为工程设计提供参考。
Abstract
In order to make up the insufficient research on the collisions between over-high truck and bridge superstructure in China and to improve the corresponding engineering design method, based on the accident investigation and high precision finite element analysis on the collision between over-high truck and bridge superstructure, a simplified computational model was proposed to calculate the collision between over-high truck and bridge superstructure. The differential equations of the simplified model were established and parts of factors in the model were determined by numerical experiments. Therefore, the collision load can be computed by the simplified model. Furthermore, in order to satisfy the engineering application, design formula of collision force with simple form based on the simplified model was proposed, and the basic factor values in the design formula were given in a table. Results show that the design formula results and the simplified model results are in good agreement with finite element results, and they are relatively safe. So they can provide reference for engineering design.
关键词
桥梁工程 /
桥梁上部结构 /
简化模型 /
撞击力 /
超高车辆 /
设计公式
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Key words
bridge engineering /
bridge superstructure /
simplified model /
collision force /
over-height truck /
design formula
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中图分类号:
U447
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参考文献
[1] 王军华,叶晓彦.立交桥试用激光防撞预警系统[N].北京晚报,2007-07-31(12).
WANG Jun-hua,YE Xiao-yan.Application of Laser Collision Avoidance System for Viaduct[N].Beijing Evening,2007-07-31(12).
[2]MONIQUE C H.Evaluation of the Performance of Bridge Steel Pedestals Under Low Seismic[D].Atlanta:Georgia Institute of Technology,2007.
[3]Manual Notice:2001-1,Bridge Design Manual[S].
[4]FU C C,BURHOUSE J R,CHANG G L.Overheight Vehicle Collisions with Highway Bridges[J].Transportation Research Record,2004(1865):80-88.
[5]张炎圣, 陆新征,宁 静,等.超高车辆撞击组合结构桥梁的仿真分析[J].交通与计算机,2007,25(3):65-69.
ZHANG Yan-sheng,LU Xin-zheng,NING Jing,et al.Computer Simulation for the Impact Between Over-high Truck and Composite Viaduct[J].Computer and Communications,2007,25(3):65-69.
[6]陆新征,张炎圣,宁 静,等.超高车辆与立交桥梁碰撞的高精度非线性有限元仿真[J].石家庄铁道学院学报,2007,20(1):29-34.
LU Xin-zheng,ZHANG Yan-sheng,NING Jing,et al.Simulation of Impact Between Over-high Truck and Viaduct Based on High Precision Nonlinear Finite Element Analysis[J].Journal of Shijiazhuang Railway Institute,2007,20(1):29-34.
[7]LU X Z,ZHANG Y S,NING J,et al.Nonlinear Finite Element Simulation for the Impact Between Over-high Truck and Bridge Superstructure[C]//HUANG F L,LI Q M,LOK T S.Proceedings of the 7th Inter-national Conference on Shock & Impact Loads on Structures.Singapore:CI-Premier Pte Ltd,2007:387-394.
[8]张炎圣.超高车辆-桥梁上部结构碰撞:机理分析与荷载计算[D].北京:清华大学,2009.
ZHANG Yan-sheng.Collision Between Over-high Trucks and Bridge Superstructures:Mechanism and Loads[D].Beijing:Tsinghua University,2009.
[9]陆新征,张炎圣,叶列平,等.超高车辆-桥梁上部结构碰撞的破坏模式与荷载计算[J].中国公路学报,2009,22(5):60-67.
LU Xin-zheng,ZHANG Yan-sheng,YE Lie-ping,et al.Failure Modes and Load Calculation of Collision Between Over-high Truck and Bridge Superstructure[J].China Journal of Highway and Transport,2009,22(5):60-67.
[10]ROBERT E A,FANOUS F S,ANDRAWES B O.Steel Diaphragms in Prestressed Concrete Girder Bridges[R].Ames:Iowa Department of Transportation,2004.
[11]EN 1991-1-1,Eurocode 1:Actions on Structures[S].
[12]TB 1002.1—2005,铁路桥涵设计基本规范[S].
TB 1002.1—2005,Fundamental Code for Design on Railway Bridge and Culvert[S].
[13]JTG D60—2004,公路桥涵设计通用规范[S].
JTG D60—2004,General Code for Design of Highway Bridges and Culverts[S].
[14]AASHTO GVCB-2-I1,Guide Specification and Commentary for Vessel Collision Design of Highway Bridges[S].
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脚注
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基金
国家自然科学基金项目 (50808106);国家西部交通建设科技项目(2008 318 223 43)
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