防灾减灾工程学报2017，Vol.37Issue(2)：187-193,7.DOI:10.13409/j.cnki.jdpme.2017.02.002
双薄壁高墩系梁设置方式对连续刚构桥地震响应的研究
Effect of Link Beam between Slender Double-wall Piers on the Seismic Responses of Continuous Rigid Frame Bridges
摘要
Abstract
In order to examine the effect of link beams on the seismic responses of a continuous rigid frame bridge with slender double-wall piers,a three dimensional nonlinear fiber model was established on the basis of the OpenSEES software.Time history analytical method was applied to comparatively investigate the following four cases,i.e.bridge models.The results show that the link beams play an important role in affecting the dynamic characteristics of the bridge.The fundamental period of the bridge with stronger link beams can be 2 times larger than that of the bridge without stronger unit beams.With stronger link beams,the increase of shear forces become more significant,and the longitudinal curvature and moment responses vary more drastically in the vicinity of the link beams.With stronger link beams,the displacement response along the pier remains in a linear shape with the maximum value at the top,which increases the deformation requirements for the bearings at the abutments.From both aspects of seismic internal force and displacement responses,it is more appropriate to design weak link beams.关键词
连续刚构桥/横系梁/地震响应/双薄壁高墩/纤维单元Key words
continuous rigid frame bridge/link beam/seismic response/slender double-wall pier/fiber element分类
交通工程引用本文复制引用
腾杰,徐略勤,刘津成,刘营..双薄壁高墩系梁设置方式对连续刚构桥地震响应的研究[J].防灾减灾工程学报,2017,37(2):187-193,7.基金项目
交通运输部应用基础研究计划项目(2014319814210)、重庆市基础与前沿研究计划项目(cstc2015jcyjA30014)、国家自然科学基金项目(51408089)、山区桥梁与隧道工程国家重点实验室培育基地开放基金项目(CQSLBF-Y14-2)资助 （2014319814210）
