重庆大学学报2024，Vol.47Issue(4)：51-63,13.DOI:10.11835/j.issn.1000.582X.2024.04.005
FRP-混凝土组合式护栏防护重型车辆撞击的能力
Anti-collision performance of FRP-concrete combined guardrail under heavy vehicle impact
摘要
Abstract
To improve the protective capabilities of existing low-grade concrete guardrails against heavy vehicles,three types of composite protective plates designed for direct installation on the surface of concrete guardrails were developed.Refined finite element(FE)models of truck-guardrails were established,and the reliability of these models was verified by comparison with crash test results.Six evaluation indexes,including impact force,collision angle variations,vehicle trajectory,height variations of the carriage box tail,vehicle dynamic extroversion value and camber angle,were considered.The anti-collision performance of the three schemes was compared and analyzed.The results indicate that all three kinds of guardrails effectively guide vehicles to turn smoothly during the integral truck impacts.Scheme 1,without hindrance,demonstrates superior performance in key indices compared to the others.Under towed truck impacts,scheme 1 exhibits excellent guiding and blocking capabilities,with an exit angle of only 0.75°.The protection energy of the combined guardrail reaches 650 kJ,providing a protection capacity 4 times greater than the existing low-grade guardrail.关键词
组合式护栏/碰撞仿真/防车撞能力/复合材料Key words
combined guardrail/crash simulation/anti-collision ability/composite material分类
交通工程引用本文复制引用
郑植,杨波,袁佩,耿波..FRP-混凝土组合式护栏防护重型车辆撞击的能力[J].重庆大学学报,2024,47(4):51-63,13.基金项目
重庆市自然科学基金资助项目(CSTB2022NSCQ-MSX1658) （CSTB2022NSCQ-MSX1658）
贵州省科技计划资助项目(黔科合支撑(2022)026).Supported by Natural Science Foundation of Chongqing(CSTB2022NSCQ-MSX1658),and the Science and Technology plan project of Guizhou Province(Qiankehe Support(2022)026). （黔科合支撑(2022）
