建筑结构学报2017，Vol.38Issue(3)：111-117,7.DOI:10.14006/j.jzjgxb.2017.03.012
波纹状悬挑大跨屋盖的风荷载特性
Wind load on wavy-shaped long-span cantilevered roof
摘要
Abstract
High-frequency-pressure-integration tests were carried out in a wind tunnel to investigate wind load characteristics on smooth cantilevered roof and wavy-shaped cantilevered roof,both of which have the same size.The effects of wavy-shaped roof surface have been evaluated in wind tunnel test.Wind pressure distribution shows that,wavy shape does not change the main mechanism of wind load,but intensifies the separation on the front edge of the roof.Bending moment coefficient is a controlling factor for the wind-resistance design of the main roof structure,and can be derived from integration.Relative to the smooth surface cantilevered roof,the mean bending moment coefficient of the wavy-shaped cantilevered roof is increased by 23 ％ and the RMS (root mean square) of bending moment coefficient of the wavy-shaped cantilevered roof is increased by 20％,under the most unfavorable wind direction angle.But wavy shape decreases the energy concentration of the fluctuating wind load when reduced frequency is between 0.1 and 0.2.Wavy shape has strong influence on the extreme wind pressure,since wind uplift on wavy-shaped cantilevered roof is 13％ larger than that on smooth surface cantilevered roof,which is the controlling factor of the wind-resistant design of cladding structures.The influence of wavy shapes should be considered for the wind-resistant design of the wavy-shaped cantilevered roof to ensure safety.关键词
波纹状屋盖/围护结构/悬挑/风洞试验/风荷载/弯矩系数/极值风压Key words
wavy-shaped roof/cladding structure/cantilever/wind tunnel test/wind load/bending moment coefficient/extreme wind pressure分类
建筑与水利引用本文复制引用
张建,李波,单文姗,杨庆山,范重..波纹状悬挑大跨屋盖的风荷载特性[J].建筑结构学报,2017,38(3):111-117,7.基金项目
国家自然科学基金项目(51578059,51338001,51378060),高等学校学科创新引智计划(B13002). （51578059,51338001,51378060）
