珠海某项目大底盘双塔超限高层结构设计

Abstract

珠海某项目由两栋超高层办公塔楼及底部商业裙房构成大底盘双塔结构，两栋塔楼平面为矩形。该项目地下3层，地上1~5层为商业，裙房屋顶为空中花园，6层以上为办公及公寓。该结构存在扭转不规则、楼板不连续、尺寸突变、竖向构件不连续、复杂连接共5项不规则项；设计中采用了合理的结构方案，并采用单塔和双塔包络设计，抗震设计中采用抗震性能化设计方法，利用多种软件进行弹性、弹塑性计算，针对结构中关键构件采取有效合理的加强措施，结构满足设定的性能目标。 A project of large chassis super high-rise twin tower building was in Zhuhai. The shapes of the two towers were rectangle. There were 3-storey basement, 5-storey for commercial, the fifth floor for hanging garden, and the floors above 6 for office and housing. The tower height exceeded the Code limit and there were five irregular items, such as torsional irregularity, the floor slab is discontinuous, size mutation, vertical component discontinuous and complex connection. It was selected reasonably structural concept. The single tower mode design and double tower mode design were using. By seismic performance-based design, with comparison of calculation by different software for elasticity and plasticity calculation, the key parts were strengthened. The results show that the structure of seismic performance can achieve the performance goals.