Innovative Design and Analysis of Mega-Sub Building

巨型地下建筑的创新设计与分析

• 批准号: 9612127
• 负责人: Ruichong Zhang
• 金额: $ 5万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 1999-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612127&HistoricalAwards=false
• 关键词: Innovative; Design; Analysis; Mega; Sub

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.

在这个项目中，提出了一种高层建筑的巨型子结构配置的创新设计，并研究了它在抑制风和/或地震荷载引起的建筑振动方面的有效性。使用巨型结构的建筑由两个主要组成结构组成：巨型结构不仅支撑着下部结构，还能抵抗外部荷载，而下部结构则为商业或住宅用途提供可用空间。从物理学的角度来看，外部荷载产生的巨型结构的动能流入子结构，导致巨型结构的振动受到抑制。同时，通过合理设计子结构的阻尼，可以将传递给子结构的能量耗散，从而减小子结构的加速度，从而最大限度地减少子结构内容物的加速度相关风险和人体不适。初步研究表明，巨分控制系统在降低湍流风荷载作用下高层建筑的振动方面具有显著的效果和效率。将进行以下任务：(a)建立大型子结构的现实模型，(b)开发与设计一致的风和地震荷载模型，(c)设计动力参数的优化研究，(d)设计大型子结构以实现所需的动力参数，(e)设计半主动/主动/混合系统，(f)大型子结构的实际设计。这项研究有望为新一代具有抗震和风力安全设计的高层建筑做出贡献。