多跨鞍形膜结构风荷载的数值模拟研究  

Numerical simulation study of the wind load on multi-span saddle membrane structures

作　　者：张建胜[1] 陶瑾[1] 王建东[1] 李伟杭[1] 吴力平[2] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014 [2]杭州科技职业技术学院城市建设学院,浙江杭州310012

出　　处：《浙江工业大学学报》2016年第4期446-450,共5页Journal of Zhejiang University of Technology

基　　金：浙江省科技厅公益技术应用研究项目(2014C33031);浙江省大学生科技创新活动计划暨新苗人才计划项目(2014R403077)

摘　　要：多跨鞍形膜结构是工程中常用的一种大跨空间结构形式,风荷载是其结构设计的控制性因素.采用CFD数值模拟方法研究其平均风荷载特性,分析膜面初始预张力、来流风向角和矢跨比对多跨鞍形膜结构表面的风压分布特性的影响规律.结果表明:膜面初始预张力的大小主要影响膜面所受正风压区域的大小,膜面初始预张力越大,受正压区域越大.来流风向角会改变膜面正负极值风压的分布,正负极值一般出现在与风向角垂直的边缘处.不同的矢跨比会产生不同大小的膜面风压系数,但是从总体上看风压的分布形式是相同的.The multi-span saddle membrane structure is a commonly used large-span spatial structure form in engineering.The wind load is a controllable fator in the structural design.The method of CFD numerical simulation is used to study the average wind pressure characteristics and to analyze the effects of the initial pretension on the membrane surface,the wind angle,and the rise-span ratio on the wind pressure distribution characteristics of multi-span saddle membrane structures.The results show that the initial pretension on the membrane surface mainly affects the size of the positive wind pressure area on the membrane surface.The larger the initial pretension on the membrane surface is,the larger the size of the positive wind pressure area is.The wind angle will change the positive or negative extremum of the wind pressure distribution and the positive or negative extremum generally appears at the edge perpendicular to the wind angle.The wind pressure coefficient of the membrane surface is influenced by the risespan ratio but the wind pressure distribution is,on the whole,the same.

关 键 词：多跨鞍形膜结构 CFD数值模拟 风压分布 影响规律 

分 类 号：TU312.1[建筑科学—结构工程]