山区公路路侧护栏在不同碰撞角度下的结构分析与改善对策

Structural Analysis and Corrective Action of Corrugated Beam Barrier on Highway Side in Mountain Area

山区公路由于地形、环境以及投资等具体条件影响,其路侧安全设计尤为重要,为保证车辆的行驶安全,对路侧护栏需进行结构安全分析与评价。针对山区公路的波形梁护栏采用AN-SYS软件,对护栏在不同角度的撞击荷载作用下的反力、应力及位移情况进行分析,得到不同的撞击角度下护栏的应力、弯矩和位移的变化规律。当碰撞角度大于30°时,护栏结构所受内力及位移变形较大,针对这一角度进行护栏的安全性能改善。

Due to the restrictions of the terrain,environment,investment and other specific conditions,the safety of road side designing is very important.So its corrugated beam barrier＇s structure needs to be analyzed and evaluated to ensure the vehicles safety.Aiming at the mountainous highway w-beam barrier,the paper analyzed the stress 、 counter-force and displacement of the structure under impact load in different angles,ANSYS.The change law of the stress,bending movement and displacement in different impact angles is put forward.Though analysis,we gain that the index will became large when the angle is larger than 30°,and we made an improvememt in the guardrail structure to improve its safety performance aiming at this angle.The results of this analysis have a instructive effect on design and improving the roadside security level.