杭州某超限超高层结构的抗震设计

Seismic design of an over⁃limit super high⁃rise structure in Hangzhou

杭州某超限超高层建筑的结构高度29577m,采用圆钢管混凝土柱框架+钢筋混凝土核心筒+伸臂桁架结构体系。利用设备层和避难层设置三道环带桁架加强层,同时在中部避难层设置一道伸臂桁架加强层,提高结构整体抗侧刚度。对整体结构进行了弹性和弹塑性分析,并针对超限情况对关键部位提出相应的加强措施,保证结构整体和各类构件满足预期的抗震性能化目标。

The structural height of an over-limit super high-rise building in Hangzhou is 29577m,which adopts the structural system of circular steel pipe concrete column frame+reinforced concrete core tube+outrigger truss.In order to improve the lateral stiffness of the structure,three ring-truss strengthening layers were set up on the equipment floor and refuge floor,as well as an outrigger truss strengthening layers was set up on the middle refuge floor.The elastic analysis and elastic-plastic analysis of the overall structure was carried out.In view of the over-limit situation,strengthening measures were proposed for the key components,so as to ensure that the overall structure and various components meet the expected seismic performance goals.