三心圆柱面网壳结构风荷载分布规律  

WIND PRESSURE DISTRIBUTION ON THREE CENTERED CYLINDRICAL LATTICED SHELL

作　　者：马文勇[1] 刘庆宽[1] 肖彬[1] 邵新霞 

机构地区：[1]石家庄铁道大学风工程研究中心,河北石家庄050043

出　　处：《工程力学》2011年第A02期166-170,209,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(50878135);河北省科技支撑计划项目(09215626D);河北省自然科学基金项目(E200800442)

摘　　要：通过某两端开口的三心圆柱面网壳结构刚性模型风洞测压试验,分析了该结构表面净压分布规律及内表面风压对净压的影响。结果表明,来流垂直与结构纵向时,结构迎风端为正压区,其余为负压区,顶部附近负压最强,内压为负压,该负压增强了结构正压区风压、减弱负压区的风压。当来流平行于结构纵向时,除结构迎风端较强风压外,其余位置平均风压和脉动风压很小,内压对结构表面风压的影响可以忽略。来流倾斜与结构纵向时,结构内表面存在正压区,该区域内结构负压较大。The rigid pressure-testing model of a three centered cylindrical latticed shell is tested in a wind tunnel. The net wind pressure distribution and the effect of internal wind pressure on net pressure on the structure are discussed. The results shows that the highest negative net wind pressure appears nearby the top of the structure and the negative wind pressure decreases because of negative internal wind pressure on the whole structure at the moment when wind perpendicular to the structure longitudinal axis; at same time positive net pressure which appears at windward end increases due to a negative internal wind pressure. Beside the high wind pressure at windward end, the mean net wind pressure and fluctuating net wind pressure are quiet low, and the effect of internal wind pressure is not significant at the case of wind parallel to the structure longitudinal axis. The positive internal wind pressure area appears at other cases which induce high negative net wind pressure.

关 键 词：风工程 风压分布 风洞试验 三心圆柱面网壳结构 净压 体型系数 

分 类 号：TU312.1[建筑科学—结构工程]