【摘要】 在设计大跨结构时,风荷载是被控制的主要因素。为探讨地面粗糙类别、基本风压、阻尼比和风向角对大跨结构风致响应的影响,以重庆某体育场大跨网壳屋盖为研究对象进行了数值模拟分析。计算结果表明:对于大跨结构,采用随机振动分析时需考虑高阶参与振型的影响,当地面粗糙类别由A类向D类变化时,风致响应会逐渐加强,随基本风压的增大,也会使得风致响应逐渐加强,随阻尼比的增大,风致响应会逐渐减弱,风向角的变化对风致响应影响较大。更多还原

【Abstract】 Influence of rough type of ground,basic wind pressure damping ratio and wind direction angle on large span reticulated shell structure was discussed,by numerical simulation analysis of a stadium in Chongqing.The results show that analyzing the random vibration of large-span structures,the impact of high step involved in vibration mode need to consider.When rough type of ground is changed from Class A to Class D,the wind-induced response will gradually strengthen.As the increase of basic wind pressure,the wind-induced response will also gradually strengthen.As the increase of damping ratio,the wind-induced response will gradually decrease.The change of wind direction angle has great influence on the wind-induced response.更多还原