重型车辆撞击桥墩荷载特性研究
首发时间:2018-06-04
摘要:近年来,随着交通运输行业的高速发展,我国重型汽车保有量迅速提升,由重型车辆撞击桥梁引起的重大交通事故也逐渐引起了研究人员的注意。而目前的研究工作多局限于中小型车辆对桥梁结构的撞击作用,因此重型车辆对桥墩的撞击作用研究是十分有必要的。本文基于有限元软件LS-DYNA建立了三种不同重量等级的精细化的卡车模型,并对重型车辆撞击桥墩的过程进行数值模拟。通过对比分析不同工况下重型车辆与桥墩的碰撞过程,研究了车辆类型、撞击速度、桥墩尺寸等参数对于碰撞力荷载的影响。研究结果可以为对重型车辆撞击荷载的简化分析提供参考。
关键词: 桥梁工程 重型车辆 桥墩 车辆速度 车辆类型 碰撞力
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Characteristics of Impact load of Collision between Heavy Vehicle and Piers
Abstract:In recent years,possessive quantity of heavy vehicle has growed rapidly, as the development of transportantion industry. Major accidents caused by collision between heavy vehicles and bridge piers have attracted researchers\' attention. Since most of the current research focus on collision between medium-sized vehicles and bridge piers, it is necessary to study the impact of heavy vehicle on bridge piers. With the finite element software LS-DYNA, this paper estabalishes refined models of three kinds of heavy vehicles with different weights and simulates the process of collision between heavy vehicle and bridge piers. By analyzing the impact of heavy vehicles on piers under different impact cases, the effect of different parameters such as vehicle type, impact velocity, and shape of bridge piers on the impact load isinvestigated. The results show that each parameter has a significant impact on the impact load, which can provide reference for the simplified analysis of heavy vehicle impact loads.
Keywords: bridge Engineering;heavy vehicle;piers;velocity;vehicle type;impact force
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