基于极大初始时间步法的非线性静动力联合分析  

Nonlinear static-dynamic coupling analysis based on maximum initial time-step method

作　　者：尹训强[1] 李浩然[1] 王桂萱[1] 

机构地区：[1]大连大学土木工程技术研究与开发中心,辽宁大连116622

出　　处：《地震工程与工程振动》2016年第2期30-35,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家重大科技专项"cap1400安全审评技术与独立验证试验"资助课题(2011ZX06002-10);辽宁省教育厅一般项目(12014498)~~

摘　　要：静动力联合分析是考虑非线性条件下结构响应分析的关键技术问题之一。本文通过分析非线性有限元静、动力平衡方程的内在联系,并结合Newmark积分算法的隐式求解特点,提出了一种基于极大初始时间步法的非线性静动力耦合算法,可保证结构在静动荷载的耦合激励下获得合理的非线性地震响应。通过对Koyna重力坝的地震响应数值分析算例,验证了该算法的合理性与有效性。另外,该算法在各类隐式求解的通用有限元程序中均易于实现,可操作性强,便于工程应用。Static-dynamic coupling analysis is one of the key technology issues for analysis of structure response in nonlinear condition. Combined with the implicit solving character of Newmark integral algorithm,a nonlinear staticdynamic coupling algorithm based on Maximum Initial Time-step Method is raised,by studying the inner relation between nonlinear finite element static and dynamic equilibrium equations for solving this issue. The algorithm could obtain rational nonlinear earthquake response of the structure under static and dynamic coupling excitation.The method is verified by seismic response numerical analysis of Koyna gravity dam. The result of analysis shows that the method is effective and rational. Meanwhile,the algorithm can be used in kinds of implicit solving general finite element program conveniently easily,and it＇s more powerful in operability and more convienient in engineering application.

关 键 词：静动力联合分析 极大初始时间步法 NEWMARK 地震响应 非线性 

分 类 号：TU31[建筑科学—结构工程] O312[理学—一般力学与力学基础]