高层建筑横风向风致响应及等效静力风荷载的分析方法

ANALYTICAL METHOD OF ACROSS-WIND RESPONSE AND EQUIVALENT STATIC WIND LOADS OF HIGH-RISE BUILDINGS

高层建筑横风向风致响应和等效静力风荷载是风工程和结构工程领域关注的问题。基于既有高层建筑横风向气动力和气动阻尼研究成果,推导出一套高层建筑横风向风致响应及等效静力风荷载的计算方法。该方法考虑了广义气动力的振型修正、气动阻尼及背景分量对风致响应的影响。通过算例与日本AIJ(2004)推荐的横风向荷载的计算方法进行了比较,显示了本计算方法的便捷性和结果的准确性,并分析了振型修正、气动阻尼和背景分量等因素对计算结果的影响。

Acorss-wind responses and equivalent static wind loads of tall buildings are presently problems of great concerns in wind engineering and structural enginerring. Based on the results of across-wind aerodynamic forces and aerodynamic damping of high-rise buildings obtained in previous studies, a new analytical method for across-wind responses and corresponding equivalent static wind loads of high-rise buildings is developed. Effects of mode-shape correction of generalized aerodynamic force, aerodynamic damping and background response component on the overall responses are taken into account in this method. A comparison of across-wind responses of a typical building computed using the present method and the method recommended by the Architectural Institute of Japan verifies the convenience and accuracy of the proposed method for practical purpose. Advantages of this method over the AIJ method are also indicated.