摘要
在人行道板与行车道之间增设防撞护栏,分析验算防撞护栏在车辆碰撞荷载作用下的锚固区混凝土受力,以及通过Midas FEA有限元分析软件分析主梁在车辆碰撞荷载作用下的受力影响。计算结果表明,有限元计算结果与规范计算结果相符,护栏根部主梁发生劈裂破坏,破坏形态呈深"V"字形,在锚栓位置处分布范围较广,锚栓设计应采取优化加固措施。
The analysis and checking calculation on the stress of anti-collision guardrails of concrete in anchorage zone under the load effect of vehicle collision are made by increasing anti-collision guardrails between sidewalk slab and traffic lane,and the stressing influence of main beam under the load effect of vehicle collision is analyzed by the software of Midas FEA finite element analysis. The calculation results show that,the calculation result of finite element conforms to that of standard,the main beam at the root of guardrail has splitting failure,the failure mode shows a deep " V" character pattern,the distribution range at the position of anchor bolt is broader,and the optimized reinforcement measure shall be adopted for the design of anchor bolt.
引文
[1]李勤策,龚帅,喻丹凤,杨福宇.HA级三横梁组合式桥梁护栏设计优化[J].城市道桥与防洪,2017(12):68-106.
[2]闫书明,陈冠雄,喻丹凤,等.几种改进的波形梁护栏的碰撞分析[J].公路工程,2016,41(1):167-171.
[3]闫书明.防撞活动护栏碰撞分析[J].武汉理工大学学报交通科学与工程版,2013,37(5):1046-1050.
[4]赵树生.高速公路波形梁护栏加高技术探讨[J].交通标准化,2013(20):25-27.
[5]中华人民共和国交通运输部.JTG/T D81-2017公路交通安全设施设计细则[S].北京:人民交通出版社,2017.