方形与圆形钢管梁半刚性护栏防撞性能对比分析  

Comparative Analysis of Crashworthiness of Square and Round Tube Beam Semi-Rigid Guardrail

作　　者：戚荣林 曾志远[2] 丁瑞雄 王福建[2] 

机构地区：[1]杭州公路交通设施工程有限公司,浙江杭州310004 [2]浙江大学建筑工程学院,浙江杭州310058

出　　处：《江南大学学报（自然科学版）》2012年第5期566-570,共5页Joural of Jiangnan University (Natural Science Edition)　

基　　金：浙江省重点科技创新团队基金项目(2010R50034)

摘　　要：根据几何等效原理,分别建立了方形和圆形钢管梁半刚性护栏,采用显式非线性有限元分析方法,模拟了汽车碰撞两种钢管梁半刚性护栏的动态响应,对比研究了碰撞过程中两种护栏的最大应力、横向位移和护栏系统及其各部件的吸能特性。结果表明,两种护栏形式都有较好的防护作用,方形钢管梁半刚性护栏的最大位移和最大Mises应力较圆形钢管梁半刚性护栏小,但其变形吸能效果明显比圆形钢管梁半刚性护栏的吸能效果差。According to the equivalent geometry principle, a square tube beam semi-rigid guardrail （STBSG） and a round tube beam semi-rigid guardrail （RTBSG） were established respectively. The dynamic behaviors of the square and round tube beam semi-rigid guardrails subjected to vehicle impact were simulated on the basis of explicit nonlinear finite element analysis method. The maximum stress, lateral displacement and properties of energy absorbing of guardrail system and its components were studied. The results show that these two guardrail systems play a protective role ; the maximum displace- ment and the maximum Mises stress of STBSG are slightly smaller than these of RTBSG, but the energy absorbing effect of STBSG is obviously poorer than the energy absorbing effect of RTBSG.

关 键 词：钢管梁护栏 碰撞 有限元 能量 

分 类 号：U417.1[交通运输工程—道路与铁道工程]