内填部分混凝土箱形截面钢桥墩的滞回性能研究  

Research on the hysteretic behaviors of partially concrete-filled steel box-section bridge piers

作　　者：王跃东[1] 高圣彬[1] 

机构地区：[1]上海交通大学土木工程系,上海200240

出　　处：《四川建筑科学研究》2012年第1期14-18,共5页Sichuan Building Science

基　　金：上海市科学技术委员会浦江人才计划(08PJ1406400);教育部留学回国人员基金资助项目

摘　　要：首先,利用试验方法对内填部分混凝土箱形截面钢桥墩在承受水平反复荷载作用下的滞回性能进行研究,探讨翼缘宽厚比参数和混凝土填充率对钢桥墩滞回性能的影响。然后,采用弹塑性有限元分析方法,对试验结果进行数值模拟。研究结果表明,钢桥墩的延性随着翼缘宽厚比的减小和混凝土填充率的提高而得到显著提高。由数值模拟得到的试件的滞回曲线、钢板局部屈曲模态等,与试验结果吻合较好。This paper aims to investigate the hysteretic behaviors of partially concrete-filled steel box-section bridge piers subjected to a constant vertical load as well as cyclic horizontal loading. The effects of flange plate width-thickness ratio and the height of filled-in concrete on the hysteretic behaviors of the piers are studied. Then an accurate elasto-plastie finite element formulation is presented to predict the hysteretie behaviors and failure modes of two piers. It is concluded that the decrease in the flange plate width-thickness ratio and the increase in the height of filled-in concrete can greatly improve the ductility behavior of steel bridge piers. The hysteretie curves and failure modes of the piers predicted by numerical analysis coincide well with the experimental results.

关 键 词：内填部分混凝土箱形截面钢桥墩 水平反复荷载 滞回性能 局部屈曲模态 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]