摘要
随着城市车桥撞击事故的增多,在对桥墩保护的同时,考虑对车辆和人员的保护也很重要。通过吸取船桥撞击中柔性防撞装置的成功经验,提出泡沫铝外包混凝土装置,依托某跨线桥的双柱式桥墩运用LS-DYNA有限元软件建立三种不同的撞击模型,从能量转化、应力和墩顶墩底横向位移三部分进行碰撞动力响应分析。结果表明:泡沫铝外包混凝土具有良好的吸能能力,能有效地减小桥墩应力和桥墩横向位移,在撞击作用下满足正常使用要求,对桥墩、车辆起到很好的保护作用。
With the increase of vehicle-bridge impact accidents in cities,it is also very important to take into account the protection of vehicles and personnel while protecting bridge piers.Through the successful experience of flexible anti-collision devices in bridge and ship impact is introduced,and the foamed aluminum encased concrete device is put forward.Based on the double-column piers of a certain span bridge,three different impact model is established by using LS-DYNA finite element software.Dynamic response analysis is carried out from three parts:energy conversion,stress and bottom lateral displacement.The results show that the foamed aluminum encased concrete has good energy absorption ability,which can effectively reduce the stress of bridge pier and the lateral displacement of pier,meet the normal use requirements under the impact.It plays a very good role in protecting piers and vehicles.
作者
刘海证
李睿
徐征
LIU Haizheng;LI Rui;XU Zheng(School of Architecture and Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650504,China;Yunnan Broadvision Engineering Consultants,Co.,Ltd.,Kunming,Yunnan 650031,China)
出处
《公路工程》
北大核心
2019年第4期13-17,40,共6页
Highway Engineering
基金
国家自然科学基金(51568029)
云南省交通厅科技开发项目[云交科2013(c)08]
关键词
桥墩
车辆撞击
保护
泡沫铝外包混凝土
bridge pier
vehicle impact
protect
aluminum foam outsourcing concrete
