上海中心大厦巨型悬挂式幕墙系统结构设计与思考

Design and Study of Super Suspend Curtain Wall Support Structure of Shanghai Tower

摘要:

上海中心大厦外幕墙系统采用了分区悬挂的巨型柔性悬挂式幕墙支撑结构体系.该体系远离主体结构、几何造型扭曲、分区悬挂重量大、悬挂高度高、竖向支承刚度柔且不均匀，整个幕墙结构体系构成及传力较为特殊导致其与主体结构协同工作复杂，给结构设计带来许多前所未有的技术挑战.从方案到施工图设计过程，无论是结构体系还是节点构造均经历了多轮的反复论证分析与优化.尤其是采用整体模型协同分析，对水平和竖向荷载下幕墙支撑结构与主体结构协同工作性能、竖向地震反应、以及施工过程中幕墙支撑结构的受力特性等问题进行了深入地分析和研究.确保了工程建设的顺利实施，实际安装施工也验证了该结构设计的可靠性.上海中心幕墙支撑结构设计经历了艰辛的设计历程，其相关设计方法和成果是对现有高层建筑幕墙结构设计理念和方法的丰富和完善，同时也引发了对高层建筑复杂幕墙系统结构设计的新的思考.

Abstract:

A unique flexible suspend curtain wall support structure (CWSS) was ultimately developed to suit exterior curtain wall system of Shanghai Tower. Its characteristics of the deviation from main structure, the twisted geometry, the heavy weight, the high suspension height, the weak & nouniform support stiffness led to the complicated cooperation properties with main structure, and a number of unprecedented challenge for the analysis and design arose. From the scheme design to the construction drawing design, structural system and joint details underwent repeated rounds of analysis, proof and optimization. Especially, By means of cooperative analysis of integrated model including CWSS and main structure, the properties of cooperative work of CWSS under horizontal and vertical loads, vertical seismic response, mechanical properties of CWSS in construction were analyzed in detail. These work ensured the successful implementation of the project construction. The actual installation and construction have proved the reliability of the design of this system. The structural design process of CWSS is tough, and its design method and achievement also enrich and improve the existing design method and concept of curtain wall systems of high buildings. Meanwhile, it encourages a lot of new studies in structural design of complex curtain wall systems of high buildings.