基于车厢变形推算撞击作用的研究  

Analysis of Vehicle Impact Effect on Bridge Based on Vehicle Deformation

作　　者：刘小燕[1] 李仁杰 王光辉[2] 贺龙飞 LIU Xiaoyan;LI Renjie;WANG Guanghui;HE Longfei(School of Civil Engineering,Changsha University Of Science And Technology,Changsha 410114,China;School of Civil Engineering and Architecture,Hunan Institute Of Science And Technology,Yueyang 414006,China)

机构地区：[1]长沙理工大学土木工程学院,长沙410114 [2]湖南理工学院土木建筑工程学院,湖南岳阳414006

出　　处：《湖南理工学院学报（自然科学版）》2018年第2期71-75,78,共6页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：国家重点基础研究发展计划(973)项目(2015CB057701);长沙科技计划项目(k1309003-11)

摘　　要：基于痕迹学理论,研究超高车辆撞击桥梁上部结构后车厢的变形特征,提出了基于车厢变形快速计算车桥撞击作用的方法.采用ANSYS/LS-DYNA软件建立车桥碰撞仿真模型,分析了不同车重、车速的超高车辆与桥梁撞击效应,揭示了车辆撞击作用与车厢变形受车速、车重影响的规律.由实测的车厢变形、车辆质量推算出撞击时的车速,计算了该车辆对某桥梁的撞击效应.考虑车厢变形特征的超高车辆撞击桥梁效应仿真分析结果可为桥梁的损伤评估、维修加固提供依据.On the basis of ichnology theory,the deformation characteristics of over-high trucks impacting on superstructures of bridges are studied.An efficient computational approach is presented for evaluating vehicle impact effect based on the vehicle deformation.The ANSYS/LS-DYNA is used to establish the vehicle-bridge interaction model.Numerical studies of vehicle-bridge impacts were conducted considering different vehicle weights and driving speeds of over-high vehicles.The numerical results show the influence of driving speeds and vehicle weights on the vehicle impact effect and vehicle deformation.The driving speed of a vehicle impacting on a bridge was evaluated based on its deformation and vehicle weight,and the impact effect of the vehicle on a bridge was computed.The simulation result of the impact effect of an over-high vehicle impacting on a bridge considering vehicle deformation characteristics provides a basis for the fast assessment of bridge damage,maintenance and reinforcement.

关 键 词：桥梁工程 车桥碰撞 车厢变形 瞬态分析 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]