摘要
悬挑网架结构被广泛应用于体育馆等大型公共建筑中,随着这种结构向大跨度和轻质化方向的发展,风荷载逐渐成为其主要控制荷载,尤其我国东南沿海地区是台风多发区。本文首先介绍了台风年最大风速的模拟方法,考虑到台风风场流动不稳定性,对其进行了修正;然后结合悬挑网架在台风作用下破坏的工程实例,进行了结构受力的几何和材料的双重非线性分析,研究了悬挑网架结构在强台风作用下的破坏机理。
Cantilever space truss has been widely applied to public buildings,such as the roofs of sports stadiums. As these structures develop for larger span and lighter weight,the wind loads become a crucial one among design loads,especially in southeast coastal region of China,where typhoon happened continually. Firstly,a simulation method of extreme typhoon velocity was introduced and then the simulation was modified considering the instability of wind fields of typhoon. Farther,an actual building destroyed by typhoon was investigated employing the material and geometrical nonlinearity method and the failure principium of cantilever space truss under typhoon was studied.
出处
《科技通报》
北大核心
2009年第1期77-82,共6页
Bulletin of Science and Technology
基金
国家高科技863计划(2007AA04Z441)
国家自然科学基金重点项目(50638050)
关键词
悬挑网架
破坏机理
极值风速
几何非线性
cantilever space truss
failure mechanism
extreme wind velocity
geometrical nonlinearity
