Innovative Design and Analysis of Mega-Sub Building

在本项目中，一个创新的设计的巨型-子结构配置的高层建筑，并研究其有效性，抑制建筑振动所造成的风和/或地震荷载。 使用巨型-子结构的建筑物由两个主要构件结构组成：巨型结构不仅支撑子结构，而且还抵抗外部载荷，子结构提供商业或住宅用途的可用空间。 从物理学的角度来看，巨型结构由外载荷产生的动能流入子结构，从而对巨型结构产生振动抑制。 同时，传递到子结构的能量可以通过子结构的适当设计的阻尼来耗散，使得子结构的加速度也可以减小，从而最小化子结构的内容物的与加速度相关的风险以及人体不适。 初步研究表明，巨-子型控制系统对高层建筑在湍流风荷载作用下的减振效果显著。 将开展以下工作：（a）建立巨型-子型结构的实际模型，（B）开发符合设计要求的风和地震荷载模型，（c）设计动态参数的优化研究，（d）设计巨型-子型建筑物以达到所需动态参数，（e）设计半主动/主动/混合系统，（f）巨型-子型结构的实际设计。 这项研究有望有助于新一代的高层建筑设计与地震和风的安全。

In this project, an innovative design of a mega-sub structural configuration for a tall building is proposed and its effectiveness in suppression of building vibration resulting from wind and/or seismic loads is investigated. A building using the mega-sub configuration consists of two major component structures: the mega structure which not only supports the sub structure but also resists external loads, and the sub structure which provides the usable space for either commercial or residential purposes. From the physics point of view, the kinetic energy of the mega-structure generated by the external loads flows into the sub structure resulting in a vibration suppression of the mega structure. In the meantime, the energy transferred to the sub structure can be dissipated by properly designed damping of the sub structure, so that the acceleration of sub structure can also be reduced, thus minimizing the acceleration-related risk for the contents of the sub-structures as well as human discomfort. Preliminary study has demonstrated the significant effectiveness and efficiency of the mega-sub control system in reducing the vibration of tall buildings under turbulent wind loads. The following tasks will be conducted: (a) establishment of a realistic model for mega-sub structures, (b) development of design-consistent wind and seismic load models, (c) optimization study of dynamic parameters for design, (d) design of mega-sub building to achieve desired dynamic parameters, (e) design of semi-active/active/hybrid systems and (f) practical design of mega-sub structure. This research is expected to contribute to a new generation of tall buildings which are designed with seismic and wind safety.