单层索网玻璃幕墙的风振响应分析

Wind-induced vibration response of single-layer cable net supported glass curtain wall

为了研究玻璃面板对单层索网玻璃幕墙结构在脉动风荷载作用下的影响,在阐述玻璃与索网共同工作机理的基础上,利用自回归法模拟得到的风速时程,对是否考虑玻璃面板作用的两种索网模型进行了时程分析.通过参数分析讨论了玻璃面板厚度、拉索截面积以及拉索初始张拉力等因素对脉动风荷载作用下的玻璃面板与索网协同工作的影响.结果表明:是否考虑玻璃面板对节点挠度有较大影响,但是对拉索索力的影响较小.索网节点的最大挠度随着玻璃的厚度及拉索的初始张拉力增大而不断减小,拉索截面积的变化对挠度的影响不明显.而拉索的索力主要取决于拉索截面积和拉索的初始张拉力,索力随着拉索截面积的减小以及拉索初始张拉力的增加而增大.

In order to investigate the influence of glass panel on the behavior of single-layer cable net supported glass curtain wall under the fluctuating wind load,the cooperated work mechanism of single-layer cable net with glass panel was presented. And on the basis of the wind speed time history simulated by autoregression method,the time history analysis was conducted for two cable net models with and without considering the effect of glass panel. The influence of such factors as glass thickness,cable area and initial cable tension on the cooperated work of glass panel with cable net under the fluctuating wind load were discussed through the parameter analysis. The results show that whether to consider glass panel has the greater influence on the node deflection,but a little influence on the cable force. The largest deflection of cable net node decreases with increasing the glass thickness and initial cable tension. However,the cable area has little influence on the largest deflection. The cable force mainly depends on the cable area and initial cable tension,and increases with reducing the cable area and increasing the initial cable tension.