摘要
巨型组合框架地震反应的简化算法是当前土木工程界研究热点之一。本文采用结构分析QR方法研究此类结构的地震反应。首先构造以样条结点广义位移参数表示的结构整体位移函数,再根据瞬时势能原理和变分原理推导巨型组合框架地震反应的样条离散化动力方程,则原结构的动反应可由样条结点的广义动反应确定。编制巨型组合框架地震反应QR法的流程图,利用相应的计算程序计算一个巨型组合框架结构分别输入两条地震波时的地震反应,将计算结果与有限元软件计算结果作对比。分析结果表明,该方法是一种经济可靠的结构计算方法,可用来计算和分析巨型组合框架结构的地震反应,为这种巨型结构形式的简化计算提供新的思路,具有较好的推广应用价值。
The simplified algorithm for seismic response of mega composite frame is one of hot research subjects in the civil engineering at present.The paper carried out study on seismic response of these structures by QR method for structure analysis.Firstly,the structure displacement function expressed by the generalized displacement parameters of spline knots was created.Then,the spline-partitoned dynamic equation of mega composite frame under earthquake role was deduced according to the principle of instantaneous potential energy functionell and variational principle.Thereafter,dynamic responses of original structure can be determined by the generalized dynamic responses of spline knots.Flow chart of seismic response of mega composite frame based on QR method was made.The seismic response of one mega composite frame under input of two earthquake waves was computed by the corresponding computational procedure respectively,and the calculation results were compared with those from the Finite Element software.Results show that QR method is an economical and reliable method for structural calculation that can be used to compute and analyze earthquake response of mega composite frame structures.It provides a new idea for the simplified calculation to the type of mega structures,and has widely application value as well.
出处
《土木工程学报》
EI
CSCD
北大核心
2010年第S1期98-101,共4页
China Civil Engineering Journal
基金
国家自然科学基金(90715016)
安徽省自然科学基金(070415220)
关键词
QR法
巨型组合框架
地震反应
样条离散
有限元法
QR method
mega-frame
seismic response
spline partitions
the finite element method
