【摘要】 依据我国现行规范设计了201m高超高层巨型框架组合结构,对其进行弹性及弹塑性动力反应分析,研究巨型框架结构各动力反应的楼层分布特征。建立的数值模型较真实地反映了混凝土和钢材(及钢筋)的材料性能,合理考虑了构件刚度退化、强度退化及滑移等非线性力学特征,利用多弹簧集中塑性单元模型模拟(型钢)混凝土柱和(型钢)混凝土剪力墙、集中塑性模型模拟(型钢)混凝土梁。结果表明:结构在罕遇地震作用下能够保持较好的工作状态,各巨型层段的层间位移角沿高度呈中大边小的弦状曲线分布。建议对中部各巨型层附近的次框架楼层以及动力反应较大的顶部巨型层予以适当加强。更多还原

【Abstract】 To characterize the mega-frame structure′s dynamic responses′vertical distribution,a 201m super-high mega-frame composite structure was designed based on Chinese current related design codes,and elasto-plastic dynamic analysis was carried out on it.Material properties for the concrete,steel and rebar were reflected in the established numerical model,and reasonable consideration was taken for the structural components′nonlinear mechanics,such as stiffness degradation,strength deterioration and slip characteristic.The(S)RC(steel reinforced concrete) column and(S)RC wall were simulated by multi-spring model,while the plasticity lumped model was taken for the modeling of(S)RC beam.Results show that the mega-frame structure can maintain a good work state under rare earthquake,and inter-story rotation for stories in a mega-storey presents a chord-curve vertical distribution with side small and middle large.It is highlighted that details of seismic design for stories near the mega-beam should be strengthened,so is the highest mega-beam for its large dynamic effect.更多还原