某超高层建筑加强层设置方案分析

ANALYSIS ON SETTING SCHEME OF REINFORCED FLOOR OF A SUPER HIGH-RISE BUILDING

以某227.6 m超高层建筑项目为例,设置伸臂及环带桁架加强层,指出了加强层位置和数量对超高层建筑的顶点位移、自振周期、层间位移角、筒体倾覆力矩等的影响,采用二分法与最大层间位移角方法相结合来寻找加强层有效位置。为寻找200~300 m建筑加强层的有效布置方案,运用分析程序ETABS建立有限元模型并布置了4道、5道数量的加强层,分析其作用效果得到多道加强层的有效布置方法。对所得方案进行多遇地震下弹性分析及罕遇地震下动力弹塑性分析,表明该结构具有良好的抗震性能,可为同类工程提供参考。

Taking a 227.6 m super high-rise building project as an example,the outrigger and ring truss strengthening layers are set.The effects of the position and number of strengthening layers on the vertex displacement,natural vibration period,inter story displacement angle and cylinder overturning moment of the super high-rise building are pointed out.The dichotomy method is combined with the maximum inter story displacement angle method to find the effective position of the strengthening layer.In order to find the effective layout scheme of 200~300 m building strengthening floors,the finite element model is established by using the analysis program ETABS,and 4 and 5 strengthening floors are arranged.The effect is analyzed,and the effective layout method of multiple strengthening floors is obtained.The elastic analysis under frequent earthquakes and dynamic elastic-plastic analysis under rare earthquakes show that the structure has good seismic performance,which can provide reference for similar projects.