某超限高层建筑抗震性能设计分析

Seismic performance analysis of an over-limit high-rise building

本工程主体结构为钢筋混凝土框架-核心筒结构,裙房及出屋面架构层为框架结构,建筑总高度为119.8 m。经判断主体结构存在扭转不规则、楼板不连续、竖向抗侧力构件不连续、偏心布置、局部不规则等多个超限项,属于不规则超限高层建筑,根据高规和抗规等要求需对其进行相关抗震性能设计。设计过程以小震弹性分析为基础,补充小震弹性时程分析及中、大震下的性能设计,并用PKPM-SAUSAGE软件进行大震下的动力弹塑性验算。对于局部的设计难点,如斜柱、穿层柱等,则通过相应的设计软件及模型进行针对性分析。结果表明,在采取针对性的抗震措施后,结构各部分均能达到预先设定的抗震性能目标,构件承载力和位移等各项指标均能满足规范要求,结构具有良好的抗震性能。

The main structure of this project is frame-corewall structure,the podiums and the out-of-roof structure are frame structure,the height of the building is 119.8 m.After the judgement,the main structure has several over-limit items such as irregular torsion,discontinuous floor,discontinuous vertical lateral force elements,eccentric arrangement and local irregularity.The project belongs to an irregular over-limit high-rise building,and according to the specification requirements,it is necessary to carry out some relevant seismic performance analysis.The seismic performance of the building are evaluated based on the elastic analysis and elastictime history analysis under frequent earthquake,and then the seismic behavior under moderat and rare earthquake are analyzed,finally the dynamic elastic-plastic analysis under rare earthquake is performed by PKPM-SAUSAGE software.For some special problems,such as inclined column and everal-floor columns,are designed by targeted softwares and computing models.The results show that after taking some targeted seismic measures,the structure could achieve the preset seismic performance target,the component bearing capacity and the displacement of the structure could satisfy requirements of the design code,the most important is that the structure has a good seismic performance.