津湾广场9号楼超限高层结构设计

Structural design of out-of-code high-rise No. 9 building in Jinwan Square

津湾广场9号楼为高区立面多次收进、结构复杂的超限高层建筑,采用钢筋混凝土核心筒-矩形钢管混凝土柱钢框架抗侧力结构体系,介绍了结构体系布置及关键部位的设计。采用PMSAP,ETABS软件对结构进行地震作用和风荷载作用下的计算以及弹性时程分析,对结构的关键部位及楼板应力进行计算分析,另外采用PERFORM-3D软件对结构进行非线性动力时程分析。分析结果表明:外框架和内部核心筒协同工作良好,结构各项指标都满足规范要求,关键部位可以实现中震弹性的抗震性能目标,结构设计满足预先设定的抗震性能目标,主体结构具有良好的承载和变形能力。

The No. 9 building in Jinwan Square has several setbacks of faqade, which make it as a complex out-of-code high-rise structure. Its lateral force resisting system applies reinforced concrete corewall and concrete-filled steel rectangular tube frame. Structure layouts and design of key parts were illustrated. The structure was analyzed by PMSAP and ETABS considering earthquake and wind load. Elastic time-history analysis was also analyzed. The key parts of structure and slab stress were analyzed in detail. Besides, the nonlinear dynamic time-history analysis of the structure was analyzed by PERFORM-3D. The analysis results show that outer frame and the inner corewall work well together. The whole structure indicators can meet the code requirements and the key parts of structure can keep elastic under fortification earthquake, structure design meets the pre-set seismic performance goals. The main structure has good capacity of bearing and deformation.