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.
出处
《空间结构》
CSCD
北大核心
2015年第4期25-31,37,共8页
Spatial 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
space frame structures
seismic response analysis
mode superposition response method
mass participation factors
reasonable mode number
