摘要
干煤棚结构一般采用轻质屋面体系,是一种典型的风敏感结构,因此风荷载是结构设计中不可忽视的问题。该文以某热电厂大跨度柱面网壳煤棚工程项目为背景,为了获得准确的用于结构设计的风荷载数据,进行了刚性模型测压风洞试验,考虑了风向角、煤堆以及周边建筑的气动干扰等因素对煤棚体型系数的影响。结果表明:来流风作用在端部山墙上呈90°~120°夹角时,测点的体型系数较大。在90°来流风时,半封闭端部山墙对结构是非常不利的,来流对煤棚顶部会有更大的风荷载。根据研究发现,模型的顶部体型系数相对较大,在建设煤棚时应对其顶部进行加固。
Light-quality roof is usually adopted in the structure of a dry coal shed,which is a typical wind sensitive structure.The wind load is a problem that cannot be ignored.In order to obtain accurate wind load data for the structural design,the pressure measurements of a wind tunnel test on a rigid structural model have been carried out based on a thermal power plant coal shed project with a large span cylindrical reticulated shell.The aerodynamic influence of wind angle and surrounding buildings on the coal shed shape coefficient is investigated.The results show that the shape coefficient value at measure points is larger when the intersection angle between the wind and the mountain wall is 90°~120°.A larger wind load acts on the semi-closed gable end of the structure when the intersection angle is 90°,and the coal roof will have greater wind loading.According to the research,the shape coefficient is relatively large at the top of a coal model,the roof structure of the coal shed should be strengthened.
作者
陈琳琳
崔会敏
郑云飞
刘庆宽
CHEN Lin-lin;CUI Hui-min;ZHENG Yun-fei;LIU Qing-kuan(School Of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;Department of Mathematics and Physics, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China;Wind Engineering Research Center, Shijiazhuang Tiedao University, Shijiazhuang 050043, China)
出处
《工程力学》
EI
CSCD
北大核心
2019年第B06期189-193,共5页
Engineering Mechanics
基金
国家自然科学基金项目(51778381)
河北省自然科学基金项目(E2018210044)
河北省高等学校高层次人才项目(GCC2014046)
关键词
干煤棚
风荷载
体型系数
风向角
风洞试验
dry coal shed
wind load
shape coefficient
wind angle
wind tunnel experiments
