摘要
本文对大跨悬索屋盖体系的几何非线性动力反应计算方法进行了研究。文中采用Wilson-θ法求解悬索体系的非线性动力反应方程;在每一时间步长△t 内使用Newton-Raphson 法求解拟静力平衡方程.按上述方法,编制了悬索体系地震反应的非线性有限元程序。应用该程序对悬索结构在水平及竖向地震作用下的动力反应包括内力、位移等进行了分析研究。讨论了各种结构参数对地震反应的影响。为地震区大跨悬索屋盖结构的设计提供了参考。
In this paper,by combining Wilson-θ method with Newton-Raphson meth-od,a new method to calculate the nonlinear dynamic response of the cable roofstructures to earthquake is developed.A nonlinear finite element computer programis developed according to the above method by the authors.Using this program,the responses of cable roof structural to vertical and horizontal earthquake are calcu-lated,and the effects of some structure parameters on the response are discussed.
关键词
非线性
地震反应
悬索结构
大跨度
cable roof structures
nonlinear
response to earthquake
