重型车辆撞击桥梁下部结构的碰撞力持时和峰值的主要影响因素
Influential Factors Analysis of Peak Impact Force and Time Duration for Substructures of the Bridge Impacted by Heavy Vehicles
DOI: 10.12677/HJCE.2017.64048, PDF,    国家自然科学基金支持
作者: 王 娟*：上海建桥学院，商学院工程管理系， 上海；钱 江, 周德源：同济大学，土木工程与防灾国家重点实验室， 上海
关键词: LS-DYNA；有限元模型；车桥碰撞；碰撞力峰值；碰撞力持时；LS-DYNA； Finite Element Model； Bridge-Vehicle Impact； Peak Impact Force； Time Duration
摘要: 桥梁规范中以恒定的静力作为车辆的撞击力，这种简单的规定已经不能满足现代交通和基础设施的高速发展。为了考察重型车辆碰撞桥梁下部结构的碰撞力持时和峰值的主要影响因素，在LS-DYNA平台上，采用经验证的车桥碰撞精细化有限元模型，对桥梁下部结构遭受重型车辆碰撞的全过程进行了数值模拟，分析了桥墩高度、车辆重量和速度等参数的变化对碰撞力持时和峰值的影响，参数研究结果为综合考虑不同参数作用的碰撞力设计方法提供了重要依据。
Abstract: In bridge design code, the load from vehicle impacting is applied as a constant static force. Such simple specification couldn’t meet the rapid development of modern transportation and infra-structure. In order to investigate influential factors to decide the peak impact force and time duration for the bridge substructures impacted by heavy vehicles, based on the LS-DYNA software, the simulation for validated refined bridge-vehicle models is carried out. The effect of height of piers, vehicle’s velocity and weight on variation of impact time duration and peak impact force is discussed, which offers important reference for design methodology of impacting force with different factors.
文章引用：王娟, 钱江, 周德源. 重型车辆撞击桥梁下部结构的碰撞力持时和峰值的主要影响因素[J]. 土木工程, 2017, 6(4): 408-416. https://doi.org/10.12677/HJCE.2017.64048

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