开洞位置对低层轻钢结构风荷载的影响  

Influence of the Openings Location on Wind Load for Low-Rise Light-Weight Steel Structures

作　　者：彭兴黔[1] 贾勇[1] 

机构地区：[1]华侨大学土木工程学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2008年第4期580-583,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省科技重大专项前期研究资助项目(2005YZ1016);福建省自然科学基金项目(E0510022);福建省建设厅科技计划项目(05-22-15);泉州市科技重点项目(2007G7);厦门市发改委科技项目(2008-70);厦门市科技计划高校创新项目(3502Z20083039)

摘　　要：鉴于高层开洞良好卸载效果与迎风面突然开洞的破坏作用,提出对低层轻钢结构开洞抵御风荷载的气动措施.通过湍流κ-ε方程和结构化非均匀网格,采用风洞实验验证的数值风洞模型模拟了4个开洞位置不同,但尺寸相同的轻钢建筑,并基于以上模型风荷载分布提出主动抗风的结构形式.分析结果表明,开洞房屋屋面平均风压较低,此种结构在强风作用下比同类型全封闭的结构抗风性能要好.Considering good unloading effect of openings on high buildings and damage from unexpected openings on windward surface, the aerodynamic measures are put forward to resist wind load through openings. Through κ-ε turbulent equation and unequal net of structure, four light-weight steel construction models with same dimension but with different locations of openings are simulated by numerical models validated by wind-tunnel. Based on the distribution of wind load in these models, active wind-resisting structure system is presented. It is suggested that active wind-resisting structure system owns better wind-resisting capability than eompletely enveloped structure, due to the lower average wind pressure on roof.

关 键 词：开洞位置 主动抗风模型 轻钢结构 低层建筑 

分 类 号：TU392.504[建筑科学—结构工程]