杭州星创城综合体项目塔楼A超高层结构抗震性能化设计

Seismic performance⁃based design of tower A super high⁃rise structure of Xing Chuang City Complex project in Hangzhou

杭州星创城综合体项目塔楼A地上45层、地下2层,结构高194.3m,结构形式为圆形钢管混凝土框架-钢筋混凝土核心筒,结构同时存在扭转不规则、楼板开洞等情况。为了实现结构预定的抗震性能目标,首先对可选的两种结构体系方案进行了优化比选,并通过设缝、优化层高解决了结构的平面、立面规则性问题。然后,采用YJK和MIDAS Gen两种计算软件对塔楼A进行了多遇地震作用下的弹性比较计算和时程分析,并通过性能设计和罕遇地震动力弹塑性时程分析,对结构在设防地震和罕遇地震作用下的响应进行了进一步的研究。最后,根据上述分析计算结果对结构的关键部位及薄弱部位采取了有针对性的加强措施。分析结果表明:整体结构及结构构件有良好的抗震性能,能满足设定的抗震性能化设计目标,结构安全可靠。

Tower A of Xing Chuang City Complex project in Hangzhou has 45 floors above ground and 2 floors underground,with a structural height of 1943m.The structure is a circular concrete⁃filled steel tube frame⁃reinforced concrete core tube.There are some problems in the structure,such as torsional irregularity,floor openings and so on.In order to achieve the pre⁃determined seismic performance of the structure,first of all,the two structural system options were optimized selection.And the regularity of plane and elevation was solved by seaming and optimizing floor height.Then,the elastic comparison calculation and time history analysis of tower A under frequent earthquakes were carried out by using YJK and MIDAS Gen software.The response of the structure under the fortification earthquake and rare earthquake was further studied by the performance design and the dynamic elastoplastic time history analysis of rare earthquake.Finally,according to the above analysis and calculation results,the key parts and weak parts of the structure have taken targeted strengthening measures.The results show that the whole structure and structural element has good seismic performance which can meet the seismic performance⁃based design objectives,and the structure is safe and reliable.