拱桥在转动地震输入下的动力模型分析  

Dynamic model anlysis of arch bridge under rotational seismic input

作　　者：李青宁[1] 张学峰[1] 李晓凤[1] 李进[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2004年第4期417-420,共4页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省自然科学研究计划项目(2001C29)

摘　　要：通过分析转动分量与平动分量输入时的差别,并考虑场地转动的影响,提出了比较切合实际的扭转分量输入的动力模型,给出了此模型的计算方法.根据Newmark提出的转动分量公式由水平地震波时程值得到了转动分量的时程值.运用数学软件MATLAB语言自编有限元程序,通过算例对此模型与一般多支承输入模型进行时程分析,并对结果进行了分析和比较.The dynamic model is proposed by considering the diffience of rotational and horizontal component excition and the effect of ground rotation ,and the method of solving this dynamic model is given. According to Newmark's formulation of rotation ,the rotational component is obtained by using the horizontal component. The dynamic model and the common multi-point model's time history anlysis are studied with examples by making infinite element MATLAB program, and the result of the two models is compared and analysed.

关 键 词：动力模型 转动分量 时程分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]