铁路站台雨棚风洞试验取值规律的探讨

Exploration on the Regulation of the Wind Tunnel Test on the No-platform-column Canopy

研究目的:铁路无站台柱雨棚为四周开敞建筑,通常采用钢结构形式,为风敏感结构,本文通过对14个无站台柱雨棚风洞试验的结果进行分析,归纳总结其共性特征,并与现行《建筑结构荷载规范》(GB 50009—2001)进行对比分析,得出无站台柱雨棚风荷载体型系数的一些分布规律,为结构计算提供参考。研究结论:(1)铁路无站台柱雨棚风压系数介于0.1～0.9之间,风吸系数介于-0.3～-2.0之间;(2)试验得出的风压体型系数一般小于《建筑结构荷载规范》(GB 50009—2001)类似参考值,而风吸体型系数两者较为接近;(3)檐口、洞口处的风荷载具有放大效应。

Research purposes： The No - platform - column Canopy is the open wide building, and steel structure. This paper analyses the results of 14 wind tunnel tests of t No - platform - column Canopy and concludes the commonness. Then contrast with the “Load Code for the Design of Building Structures ” （ GB 50009 - 2001 ）. This paper educes some distributing of the wind load figuration coefficients of No - platform - column Canopy . The disciplinarian provide some reference for the structure calculation. Research conclusions： （ 1 ） The wind load pressure figuration coefficients of the No - platform - column Canopy is between 0.1 - 0.9, the wind load suck figuration coefficients is between - 0.3 - - 2.0 ; （2） The wind load pressure figuration coefficients of the test is smaller to the “Load Code for the Design of Building Structures” （ GB 50009 -2001 ） and the wind load suck figuration coefficients is bigger; （3） The wind load figuration coefficients enlarges on the cornice and hole.