侧向刚度对带梁式转换层结构的扭转效应影响

Influence of Lateral Stiffness on Torsion Effect of Structures with Girder Transfer Floor

用SAP2000分析软件建立4种有限元模型.对带转换层结构进行模态分析得出结构的自振特性,结果显示侧向刚度比对结构自振周期影响不大;振型分解反应谱分析及弹性时程分析,得出结构的各种位移信息.由分析结果可知随着转换层结构上、下侧向刚度比的增加,结构的周期比从0.806 8减小至0.710 1,位移比从1.132减小至1.081,为带梁式转换层的平面不规则高层建筑结构抗扭设计提供了参考依据.

Four finite element models were established with the help of the analysis software SAP2000. The natural vibration characteristics of the transfer floor structure was obtained from the model modal analysis of the structure, and the result shows that the lateral stiffness ratio has little impact on the natural vibration of the structure. The analysis of response spectrum and elastic time history was made to get the displacement message of the structure. The analysis result shows that the period ratio of the structure decreased from 0. 806 8 to 0. 710 1 and the displacement ratio decreased from 1. 132 to 1. 081 with the increase lateral rigidity ratio. The research is thus of much significance for the anti-torsion design of irregular high-rise buildings with girder transfer floor.