大跨度屋盖结构站房风洞试验研究  

WIND TUNNEL EXPERIMENTAL STUDY OF THE STATION WITH LONG-SPAN ROOF STRUCTURE

作　　者：李胜兵 杨立国[2] 何连华[2] 

机构地区：[1]中铁建设集团有限公司,北京100040 [2]中国建筑科学研究院,北京100013

出　　处：《钢结构》2017年第10期25-28,109,共5页Steel Construction

摘　　要：以某大跨度屋盖结构火车站风洞实验研究为例,分析大跨度三跨双坡曲面屋盖的风荷载特性,并利用刚性模型风洞试验得到的脉动压力数据进行风致振动分析,试验结果表明:在屋面边缘及屋脊附近的上吸风荷载绝对值要比屋面内部区域值大,屋面波谷区域风荷载值在-0.5^-1.0 kN/m^2范围内,悬挑位置及屋脊上吸风荷载值最大可达-5.0 kN/m^2;脉动风压系数一般在迎风屋檐附近比较大,可达0.6。研究同时表明大跨屋盖的风荷载取值受建筑外形、周边干扰、结构特性、风向等因素影响明显,需要进行全面深入的分析研究。The paper analyzed the wind load characteristic of the long-span double pitch curved roofs with three spans by taking the wind tunnel experimental study on some train station with long-span roof structure,and then made a windinduced vibration analysis based on the fluctuating pressure data obtained from the wind tunnel test of rigid mode.Then,the test results were summarized and analyzed to provide the reliable basis for the wind-resistant design of the double pitch curved roofs with three spans.The test results showed that the absolute value of the suction wind load near the roof and the roof edge was larger than that in the interior zone of the roof;the wind load of roof trough area was in the range of -0.5^-1.0 kN/m^2;the maximum suction load of the cantilever and the roof was up to -5.0 kN/m^2;the coefficient of fluctuating wind pressure was generally larger than that near the windward-side eave and up to 0.6.The study also showed that,the wind load value of the long-span roof was significantly affected by building shape,surrounding interference,structural characteristics,wind direction and so on.Therefore,it is necessary to make a thorough research.

关 键 词：大跨屋盖结构 风荷载 风洞试验 风振分析 

分 类 号：TU317[建筑科学—结构工程]