摘要
针对某悬挑网架,分别建立网架整体有限元模型(model1)和考虑土-结构共同作用网架有限元模型(model2),通过在三维多遇地震时程作用下网架结果的对比分析,重点考察悬挑网架悬挑端最大位移和与支座相邻杆件应力的变化情况.结果表明,考虑土-结构共同作用时,悬挑网架悬挑端最大竖向位移较整体模型时增大,部分与支座相邻杆件应力增大.建议在工程设计中对中软场地土上的悬挑网架考虑土-结构共同作用.
The influence of soil-structure interaction（SSI） on elastic seismic responses of a cantilevered space truss is investigated. First, two finite element models are developed. One of them （model1） includes framework and cantilevered space truss. The other one（model2） includes soil, foundation, framework and cantilevered space truss. Then, time-history analyses for models are implemented under three-dimensional seismic excitation. The results show that model2＇ s maximum vertical displacement of the cantilevered side increased, the axial stress of some truss members nearby bearings increased. It is suggested that the relative weakness of the foundation cantilevered space truss considering soil-structure interaction.
出处
《河南大学学报（自然科学版）》
CAS
北大核心
2014年第4期495-499,共5页
Journal of Henan University:Natural Science
关键词
土-结构共同作用
悬挑网架
时程分析
有限元
soil-structure interaction
cantilever space truss
time-history analysis
finite element
