大跨距仓棚结构表面风压分布特性试验研究  

Experimental Study of Wind Pressure Distribution on Surface of Large Span Warehouse Shed

作　　者：艾辉林 周志勇[2] 

机构地区：[1]上海应用技术大学城市建设与安全工程学院,上海201418 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《上海交通大学学报》2016年第11期1748-1752,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(50878148);上海自然科学基金(13ZR1441100)资助项目

摘　　要：结合某一跨度82m、高度30.8m的实际仓棚工程,通过风洞试验研究了不同风向角、端部敞开或封闭的结构形式以及是否考虑周边建筑及地形等情况下仓棚表面的风荷载分布规律.研究结果表明:斜风作用下仓棚抗风更为不利,端部的敞开或封闭对仓棚结构的风荷载分布有较大影响,端部局部区域存在较为明显的风压增强现象,周边建筑及地形的存在使得仓棚表面风压的分布更为复杂.结合仓棚表面风压分布特点以及结构抗风验算的不利状态,将仓棚表面划分为5个特征区域,并给出了可用于工程抗风设计的分块体型系数建议取值.The distribution of the surface pressure of an actual warehouse shed with a span of 82 mand a height of 30.8m was studied by wind tunnel tests under different conditions,such as different wind angles,open or closed ends,and the surrounding buildings and terrain,etc.The research results show that the warehouse shed structure is much unfavorable under inclined action,the open or closed ends have a great influence on the wind load distribution,the obvious pressure booster phenomenon is present on the end region,and the surface pressure distribution is much complex with the surrounding buildings and terrain.With the pressure distribution and the adverse state of structural wind resistance,the warehouse shed surface is divided into five characteristic regions,and their block shape coefficients are recommended which can be used for design.

关 键 词：大跨距仓棚 结构布置 风洞试验 体型系数 端部效应 

分 类 号：TU352[建筑科学—结构工程]