东西汇双塔高位大跨度斜交连体结构设计

Design of high-level large-span skew towers linked with connective structure of Dongxihui

东西汇连体双塔的塔楼高度分别为119、167.3m,高位连接体跨度约70m,塔楼与塔楼之间及塔楼与连接体之间的主抗侧力角度均有夹角,为高位大跨度斜交连体超限结构。主体双塔分别采用框架-剪力墙结构体系、框架-核心筒结构体系,连接体为钢桁架体系。根据结构的超限情况合理选取抗震性能化设计目标,详细论述了连接体对两塔楼动力特性的影响,对超长钢结构连接体进行温度应力分析、抗连续倒塌分析、竖向振动舒适度分析、施工模拟分析并且介绍了连接体关键节点的设计。根据结构特点采取了有针对性的加强措施。结果表明,各项指标均良好,结构能实现设定的抗震性能目标。

The tower heights of the Dongxihui conjoined twin towers are 119 and 167.3 m respectively, and the span of the high-level linker is about 70 m. There is an angle between the two towers and between the tower and the connector. It is a high-rise large-span skew connected structure. The main twin towers adopt the frame-shear wall structure system and the frame-core tube structure system respectively, and the linker adopts steel truss system. According to the out-of-code condition of the structure, the seismic performance design target was selected reasonably. The influence of the linker on the dynamic characteristics of the two towers was discussed in detail. The temperature stress analysis, anti-continuous collapse analysis, vertical vibration comfort analysis, construction simulation analysis were carried out on the super-long steel structure linker, and the design of the key joints of the linker was introduced. According to the structural characteristics, targeted strengthening measures were taken. The results show that all the indexes perform well and the structure can achieve the seismic performance target.