基于概率分析的高层建筑风荷载组合方法

Combination Method of Wind Load About Highrise Buildings Based on Probability Analysis

摘要:

基于高频天平试验和Copula Frank函数构建了高层建筑风荷载两正交方向分量效应的联合概率分布函数，并基于应力准则和考虑变量之间的相关性，求解具有一定保证率的风荷载组合系数.最后，将采用本文组合方法、Solari组合方法和Asami组合方法得到的总效应与真实的总效应进行对比.结果表明，本文方法给出的组合系数可使风荷载的总效应与真实值趋于一致，传统组合方法计算得到的风荷载总效应过于保守.

Abstract:

A joint probability density function of along wind direction and acrosswind direction on wind load effect was built based on the highfrequency force balance test and Copula Frank function. Then, the rule of stress was taken as a design basis and the combination coefficient with a certain assurance of wind load components was solved. Finally, the stress effects obtained from the proposed combination method were compared with the true stress effect and the stress effect obtained from other combination methods. The results show that the combination coefficients provided by the proposed method can make the combination stress effect close to the real stress effect while the traditional combination method tends to be conservative.