大跨度钢箱提篮拱桥地震反应的分析方法  

Methods of seismic response analysis of long span X-style steel box-section arch bridge

作　　者：王建军[1] 秦荣[1] 谢开仲 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004

出　　处：《兰州理工大学学报》2008年第1期102-105,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(19872020);广西科技攻关项目(桂科攻0592005-1C)

摘　　要：基于有限元理论,应用大质量法(LMM)和拱脚固定法建立大跨度钢箱提篮连拱桥的空间动力计算模型.在考虑箱型拱肋翘曲和剪切变形的基础上,对连拱桥进行非线性地震时程反应分析,验证大质量法的科学性.复核了结构体系满足当地抗震设防要求,发现钢箱拱肋某些部位的扭力和剪力明显,建议设计时予以考虑.Based on finite element theory, the 3 dimensional dynamic evaluation model of long-span X- style steel box-section arch bridge was created with large-mass method （LMM） and fixed arch foot method. Then its nonlinear time history seismic response was analyzed with a consideration of warping and shear deflections of box arches, so that the scientific reasonableness of LMM was verified. The checking computation proved that the structural system of the bridge was appropriate for the anti-seismic require- ments. It was found, however, that the torsion and shear forces acting on some parts of the arch ribs were larger significantly, so that it should be suggested that both of them would be considered in design.

关 键 词：大跨度桥梁 钢箱提篮连拱桥 大质量法 拱脚固定法 时程分析 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]