基于仿真模拟的双层双波护栏升级改造  

Upgrading and Reconstruction of Double-Layer Double-Wave Guardrail Based on Simulation

作　　者：胡健[1] 张浩浩 王坤 HU Jian;ZHANG Haohao;WANG Kun(Jiangsu Xiandai Road and Bridge Co.,Ltd.,Nanjing,Jiangsu 210049,China)

机构地区：[1]江苏现代路桥有限责任公司,江苏南京210049

出　　处：《黑龙江交通科技》2024年第2期167-171,共5页Communications Science and Technology Heilongjiang

摘　　要：结合沈海高速路侧波形梁护栏现状,提出一种双层双波护栏提质升级的改造方案,并利用计算机仿真模拟与实车碰撞试验对双层双波改造护栏的安全性能进行验证。采用经实车碰撞试验校核的仿真有限元模型,建立实车碰撞试验护栏和双层双波护栏的车辆-护栏碰撞仿真模型,模拟“车辆-护栏”碰撞过程,计算护栏的阻挡功能、导向功能、缓冲功能以及变形相关指标,分析双层双波护栏与实车碰撞试验护栏防护性能的差异,结果表明:防护等级安全性能各项指标均满足规范要求;双层双波护栏对中型客车和中型货车的阻挡功能指标优于实车碰撞试验护栏,小型客车碰撞双层双波护栏后顺利导出,双层双波护栏改造结构防护等级能够达到A级(160 kJ);现场实施时应对原护栏结构尺寸、基础以及力学性能指标等参数进行复核,并确保护栏的改造施工满足相关标准规范的要求。Combined with the current situation of the wave-beam guardrail on the side of Shenhai Expressway,a renovation scheme for upgrading the quality of double-layer double-wave guardrail is proposed,and the safety performance of double-layer double-wave renovation guardrail is verified by computer simulation and real vehicle crash test.Using the simulation finite element model checked by real vehicle crash test,the vehicle-guardrail collision simulation model of real vehicle crash test guardrail and double-layer double-wave guardrail is established,the collision process of"vehicle-guardrail"is simulated,the blocking function,guiding function,buffer function and deformation related indicators of the guardrail are calculated,and the difference between the protective performance of the double-layer double-wave guardrail and the guardrail in the real vehicle crash test is analyzed,and the results show that all the indicators of safety performance in the protection level meet the requirements of the specification.The blocking function index of double-layer double-wave guardrail for medium-sized buses and medium-sized trucks is better than that of real vehicle crash test guardrail,and the small bus is smoothly exported after colliding with double-layer double-wave guardrail,and the protection level of double-layer double-wave guardrail transformation structure can reach grade A(160 kJ);During the on-site implementation,the original guardrail structure size,foundation and mechanical performance indicators and other parameters should be reviewed,and ensure that the renovation construction of the guardrail meets the requirements of relevant standards and specifications.

关 键 词：双层双波护栏 提质升级 仿真模拟 实车碰撞 

分 类 号：U417.12[交通运输工程—道路与铁道工程]