高层建筑风致响应和等效静力风荷载的特征

CHARACTERISTICS OF WIND INDUCED RESPONSES AND EQUIVALENT STATIC WIND LOADS OF TALL BUILDINGS

详细讨论了高层建筑风致振动和等效静力风荷载的计算方法及其特征。将结构风致响应分解为平均响应、动力响应的背景分量和共振分量,给出了相应的计算公式;还给出了背景和共振等效静力风荷载的计算公式,提出了等效静力风荷载组合的一种简便方法,并讨论了计算背景分量的QML法和LRC法的差异。最后,以一典型高层建筑为算例,讨论了高层建筑风致响应和等效静力风荷载的主要特征。

Computational methods and representative characteristics of wind induced responses and equivalent static wind loads of tall buildings are discussed in detail. The responses and equivalent static wind loads are both divided into mean, background and resonant components, and the formulas for these components are given correspondingly. The difference between QML and LRC approaches for background component is then discussed. A simple and convenient method for total equivalent static wind loads is proposed. Finally, a typical tall building is taken as an example to demonstrate the main characteristics of the responses and equivalent static wind loads of tall buildings.