摘要
为了研究局部开洞的折叠网壳结构表面风压分布,基于流体动力学基本原理,探讨了房屋局部开洞下计算域的选取,计算方法、边界及壁面条件的确定。运用计算流体动力学软件Fluent6.3建立了计算模型,数值模拟得到开洞结构内外表面风压系数等值线的分布。在此基础上,分析了开洞结构房屋在不同风速,不同风向角,不同开洞位置及大小等主要因素下风场的分布规律,并与未开洞结构表面风压分布规律和内压系数估算公式所得到的结果进行了对比,其规律性吻合较好。通过内外表面风压系数,得到净体型系数的分布,提出应用于抗风设计的净体型系数分布表。
The numerical model of folded reticulated shell with local opening was established based on the computational fluid dynamics code Fluent 6.3. The size of the computational domain, the boundary conditions and interface conditions were discussed. The contours of wind pressure coefficients for the inner and outer surface of the reticulated shell with local opening were obtained. Parametric studies were carried out to investigate the influence of wind speed, wind direction, the location and the size of the opening on the distribution characteristics of the wind pressure. The wind pressure was compared with that obtained from the empirical formula and good agreements can be observed. The net wind load shape coefficient was obtained based on the wind pressure coefficients of the inner and outer surface.
出处
《工程力学》
EI
CSCD
北大核心
2013年第10期184-191,共8页
Engineering Mechanics
基金
总后建筑工程研究所研究基金项目
陕西省自然科学基金项目(2004E204)
中央高校科研专项资金项目(CHD2012TD012)
关键词
折叠网壳
风荷载
数值模拟
局部开洞
净体型系数
内压系数估算公式
folded reticulated shell
wind load
numerical simulation
local opening
net wind load shapecoefficient
formula estimating wind pressure
