针对某大底盘双塔超限高层结构,采用基于性能的设计方法进行抗震设计。通过在小震、中震、大震作用下的弹性和弹塑性分析,了解该结构的动力特性和破坏特征。计算结果显示因双塔对称布置,受力较为合理,具有较强的抗震性能,满足延性设计的要求,达到了小震不坏、中震可修、大震不倒的抗震设防目标。 Aiming at the over-limit high-rise structure of a large chassis and twin towers, the performance-based design method is adopted for seismic design. Through the analysis of elasticity and elasto-plasticity under the action of small earthquakes, moderate earthquakes and large earthquakes, the dynamic characteristics and failure characteristics of the structure are understood. The results of the calculation show that the twin towers are symmetrically arranged, the stress is reasonable, the seismic performance is strong, and the requirements of ductility design are satisfied. The goal of seismic fortification is achieved, which is not bad for small earthquakes, repairable for moderate earthquakes and large earthquakes.