超高车辆-桥梁上部结构碰撞的破坏模式与荷载计算  

Failure Modes and Load Calculation of Collision Between Over-high Truck and Bridge Superstructure

作　　者：陆新征[1] 张炎圣[1] 叶列平[1] 何水涛[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《中国公路学报》2009年第5期60-67,共8页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50808106)

摘　　要：为改进桥梁设计,提高桥梁上部结构抗撞能力,研究了超高车辆-桥梁上部结构碰撞机理;基于事故调查和有限元模拟,对典型的超高车辆-桥梁上部结构碰撞事故进行了仿真,分析了桥梁上部结构在超高车辆撞击下的位移响应和破坏模式,并对撞击荷载计算方法进行了讨论。结果表明:桥梁上部结构在超高车辆撞击下的破坏模式包括整体型破坏和局部型破坏,可以基于简化半正弦撞击力时程对其进行设计。In order to improve the design and the capacity of anti-collision of bridge superstructure, the mechanism of collision between over-high truck and bridge superstructure was studied. Based on actual accident investigations and high-precision finite element simulation, classical collision accident of bridge superstructure and over-high truck was simulated. The failure modes and displacement response of the bridge superstructure under collision of over-high truck were analyzed, and the calculation method for collision load were discussed. Results indicate that the failure modes of bridge superstructure impacted by collision of over high truck include the global and local failures, which can be designed by the simplified half-sine collision load time history.

关 键 词：桥梁工程 上部结构 精细化有限元 抗撞设计 超高车辆 破坏模式 

分 类 号：U447[建筑科学—桥梁与隧道工程]