用Nataf变换的超高层建筑屋顶结构风荷载预测

Wind Load Prediction of Roof Structure of Super High-Rise Building with on Nataf Transform

传统方法在预测建筑屋顶结构风荷载时,受到极端天气影响,导致建筑屋顶结构风荷载预测误差增大,因此提出一种Nataf变换的超高层建筑屋顶结构风荷载预测方法。设计可靠性分析功能函数,计算超高层建筑屋顶结构不可靠度,建立超高层建筑屋顶结构风荷载风险模型;将风振系数、风荷载大小系数、风压高度变化系数和基本风压计算值相结合,确定屋面结构风压标准值与基本风压的关系,计算得到超高层建筑屋顶结构风压标准值;设计超高层建筑屋顶结构风荷载预测算法,实现了设计超高层建筑屋顶结构风荷载的预测。仿真结果表明,提出的超高层建筑屋顶结构风荷载预测方法不会受到风向的影响,可以有效提高超高层建筑屋顶结构风荷载的预测精度。

During the period of the wind load prediction of the building roof structure, the traditional method is subject to the environment, easily resulting in large wind load prediction errors. Therefore, this paper proposed a Nataf transform wind load prediction method for super high-rise building roof structures. Firstly, the reliability analysis function was designed to calculate the unreliability of super high-rise building roof structure, and the wind load risk model of super high-rise building roof structure was established. Secondly, the wind vibration coefficient, wind load coefficient, wind pressure height variation coefficient and basic wind pressure calculation were utilized to determine the relationship between the standard value of wind pressure and basic wind pressure, thus obtaining the standard value of wind pressure of the super high-rise building roof structure. Finally, the wind load prediction algorithm of the super high-rise building roof structure was designed to realize the wind load prediction of the super high-rise building roof structure. The simulation results show that the prediction method in this work is not easily affected by the wind direction, and can effectively improve the prediction accuracy of wind load.