复杂体型大跨屋盖表面风压分布的试验研究  

Experimental Study of Wind Pressure Distributions on a Long-span Complex Roof Structure

作　　者：张明亮[1] 李秋胜[1,2] 陈伏彬[1] 卢春玲[1] 李永贵[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]香港城市大学,香港100013

出　　处：《湖南大学学报（自然科学版）》2011年第10期1-6,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金重大研究计划重点项目(90815030)

摘　　要：通过对吉林火车站的刚性模型风洞试验研究,得到了屋盖表面的平均风压系数、脉动风压系数等值线分布图,对其风压分布特性做了详细的分析.研究结果表明:大跨屋盖结构表面主要呈现负风压(风吸力),主站楼在迎风区屋檐、悬挑区域及屋面凸起的天窗位置气流分离较大,出现较大的负风压系数;由于站台雨篷四周开敞,气流流经站台雨篷时较为顺畅,气流分离较小,因而站台雨篷风压系数较小.Based on the wind-tunnel test of the rigid model of Jilin Railway Station, the contours of the mean and fluctuating wind pressure coefficients were presented and discussed. Analyses of the characteristics of the wind pressure distributions were conducted. It was found that negative pressures （suctions） occurred on the long-span roof in general, high negative pressure coefficients occurred on the eaves, cantilevered roof and the bulge part of the roof on the main station building on the windward, and relatively smaller suctions occurred on the railway platform awning because of the open surrounding configurations there. These conclusions will be useful in the wind-resistant design of long-span roof structures with complex shapes.

关 键 词：火车站 大跨屋盖 风洞试验 风压系数 

分 类 号：TU312.1[建筑科学—结构工程]