空间网格结构振型分解反应谱分析合理振型数研究  

Reasonable mode number required in mode superposition response analysis for space frame structures

作　　者：吴雨杭 尹越[1,2] 刘璐[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《空间结构》2015年第4期25-31,37,共8页Spatial Structures

摘　　要：以钢管桁架、平板网架、双层球面网壳及双层柱面网壳等常用空间网格结构为研究对象,采用振型分解反应谱法进行地震反应分析,分别按《空间网格结构技术规程》及振型质量参与系数累积达到90%确定参与组合的振型数量,通过对所得网格结构杆件动应力相对误差的比较,确定采用振型分解反应谱法进行空间网格结构地震反应分析时所需参与组合的合理振型数量.Typical space frame structures,such as tubular truss,space truss,double-layer latticed dome and double-layer cylindrical latticed shell were taken as case studies.Mode superposition response method was employed for the seismic response analysis of these structures.Different number of modes were adopted in mode superposition according to related provision of＇Technical Specification for Space Frame Structures＇ and the accumulation of mass participation factors（MPF）reaching 90% respectively.By comparison of the relative error of dynamic stress of all members,reasonable mode number required in mode superposition response analysis was determined for different space frame structures.

关 键 词：空间网格结构 地震反应分析 振型分解反应谱法 质量参与系数 合理振型数 

分 类 号：TU393.3[建筑科学—结构工程]