地震对斜交桥墩稳定性影响的有限元分析  

Finite element analysis of effect of earthquake on stability of skew piers

作　　者：孙金坤[1,2] 谢治英[1] 何鑫[1] 袁鑫[1] 林跃水[1,3] 

机构地区：[1]攀枝花学院土木工程学院,四川攀枝花617000 [2]攀枝花学院工程结构研究所,四川攀枝花617000 [3]四川省八佾建筑设计研究院,四川攀枝花617000

出　　处：《四川建筑科学研究》2011年第3期172-175,179,共5页Sichuan Building Science

摘　　要：以常见跨径简支斜交桥为例建立有限元模型,以新型摩擦摆系统支座、板式橡胶支座、抗震型橡胶支座和铰接支承连接为支座形式,通过有限元的方法,以斜度为常变参数,对以上4种支座的刚度和形式进行计算分析,进行常遇地震与罕遇地震下的反应谱和线性时程分析,算出桥墩内力并进行参数分析,对比研究地震对不同支座形式和刚度的斜交桥墩的影响。为正确进行斜交桥的抗震设计提供了有益参考。This paper takes common simply supported skew bridges with span as examples to build finite element models.Taking the new friction pendulum system bearing,laminated rubber bearing,seismic rubber bearing and joint bearing connection as bearing forms and obliquity as the changing parameter,through the method of finite element,this paper changes the rigidity and forms of the above four bearings and analyzes the response spectrum and linear time interval under ordinary earthquakes and severe ones respectively.Thus,this paper obtains the internal force of piers,carries out the parameter analysis and makes a comparison between the different effect of earthquakes on skew piers with different bearing forms and rigidity,which provides reference for the seismic design of skew bridges.

关 键 词：斜交桥墩 支座形式 抗震性能 有限元 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]