基于垂直城市设计理念的平台型超高层结构体系研究

基于垂直城市设计理念,提出了一种新型超高层结构体系,即平台型超高层结构体系。该体系沿高度方向采用巨型结构搭建若干层结构平台,在各结构平台上建造各种不同使用功能及结构体系的建筑,而巨型结构平台由竖向筒体+桁架平台+斜撑组成。该体系的布置及受力特点基本符合极限高层建筑体系的概念,具有抗侧移效率高、适应各种城市功能建筑、实现垂直城市的建造的特点。对某400m高、575m高两栋在建超高层项目,分别采用2种平台型结构体系和巨柱框架-核心筒-伸臂桁架结构体系,进行了各体系的抗侧移效率及其他力学指标、建造成本等多方面、多角度的对比。结果表明,钢筋混凝土竖向筒体+钢桁架平台+斜撑的平台型结构体系是最优选择。

Research of platform-type super high-rise structural system based on vertical city design concept

Based on the concept of vertical city design, a new type of super high-rise structural system was proposed, namely a platform-type super high-rise structural system. The system used a giant structure to build several layers of structural platforms along the height direction. Various structures with different functions and structural systems were built on each structural platform. The giant structural platform consisted of vertical cylinders, truss platforms, and diagonal braces. The layout and mechanical characteristics of the system basically met the concepts of the extreme high-rise building system. It had the characteristics of high lateral displacement resistance efficiency, adaptability to various urban functional buildings, and the construction of vertical cities. For a 400 m high and a 575 m high super high-rise projects under construction, two platform-type structural systems and a giant column frame-corewall-outriggers structural system were used, respectively, and the lateral displacement resistance efficiency and other mechanical indicators and construction costs of each system were compared. The results show that the platform-type structural system of reinforced concrete vertical corewall + steel truss platform + diagonal brace is the best choice.