锯齿形雨棚屋面风荷载体型系数取值探讨

研究目的:开敞式锯齿形雨棚屋面风荷载体型系数的取值目前没有可供设计使用的规范条文,现阶段一般是进行风洞试验,由风洞试验结果得到相关的体型系数。本文结合苏州站、南京南站无站台柱雨棚风洞试验,研究开敞式锯齿形雨棚屋面风荷载体型系数的分布规律,并与封闭式锯齿形屋面进行对比,为锯齿形屋面结构计算提供科学依据。研究结论:(1)开敞式锯齿形雨棚屋面,其风压体型系数均不大,大部分在0.3左右或小于0.3;(2)风吸体型系数除极小范围的边缘区域达到-1.6外,大部分在-0.3～-0.6之间,与《建筑结构荷载规范》(GB50009—2001)封闭式锯齿形屋面较为接近。

Discussion on the Wind Load Figuration Coefficients Put on the Sawtooth Exoteric Surface

Research purposes: The wind load figuration coefficients of the open sawtooth exoteric surface now always is got through wind tunnel test because the "Load Code for the Design of Building Structures(GB 5000—2001)" has not correlation content.This paper introduces the research of the wind load figuration coefficients put on the suspension roof of Suzhou and Nanjing South Railway Station through wind tunnel test which are sawtooth exoteric surface.It also discusses the difference with the close roof.Consequently all these work lay a foundation for the structural calculation of next stage. Research conclusions:(1) The wind load pressure figuration coefficients of the open sawtooth exoteric surface now always is about 0.3 or little 0.3;(2) The wind load suck figuration coefficients is between 0.3~0.6 except little edge region which is 1.6,the conclusion is close to the "Load Code for the Design of Building Structures(GB 50009—2001)".