考虑质量和刚度分布的空间结构支承系统简化方法  

A simplified method for supporting system of spatial structures considering the distribution of mass and stiffness

作　　者：吴轶群[1] 罗永峰[1] 王磊[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《空间结构》2015年第2期46-54,59,共10页Spatial Structures

基　　金：国家自然科学基金项目(51378379)

摘　　要：目前对支承于下部结构的空间结构体系,一般采用上下部结构整体建模的方式计算其地震响应,通常计算量很大,为工程设计带来不便.本文提出一种可考虑质量、刚度分布的下部支承结构体系的简化方法,可应用于体系复杂、扭转显著结构的地震响应分析.通过对某实际结构的计算分析验证,本文方法能大幅减少计算量,结构整体地震响应计算精度满足工程设计要求,但个别构件应力计算精度有待改进.To estimate the seismic response of spatial structure with a supporting system, an overall model is usually needed, which can be computationally demanding for routine application. Developed herein is a simplified method considering the distribution of mass and stiffness and available for complicated structure with significant torsion. When applied to a practical project, this method is demonstrated to be accurate in overall seismic response estimating, while less accurate in stress calculating of individual members.

关 键 词：空间结构 下部支承体系简化 地震响应分析 质量和刚度分布 扭转效应 

分 类 号：TU393.3[建筑科学—结构工程]