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综合考虑安全性、经济性、景观性因素,提出了一种高防护等级组合式护栏结构。采用LS-DYNA显式有限元程序进行求解,对护栏结构进行了结构优化,并运用计算机仿真方法对护栏结构进行安全性能分析。计算机仿真分析结果表明:经设计优化的HB级组合式护栏,各项评价指标均满足评价标准要求,防护等级达到HB级(640k J)。该护栏经实车足尺碰撞试验验证后,可用于危险路段的路侧安全防护,提高安全防护水平。
Considering the factors of safety, economy and landscape, a kind of combined guardrail structure with high degree of protection is proposed. The LS-DYNA explicit finite element program was used to solve the structural optimization of the guardrail, and the safety performance of the guardrail was analyzed by computer simulation. The results of computer simulation show that the designed and optimized HB-type guardrails meet the evaluation criteria and the protection level reaches HB level (640k J). After full-scale collision test, the guardrail can be used for roadside safety protection of dangerous sections and improve the safety protection level.