论文部分内容阅读
风振系数是进行结构风荷载计算和抗风设计的重要参数。本文利用线性自回归过滤器的模拟方法对考虑时间和空间相关性的风场进行模拟,采用有限元分析软件ANSYS对一跨度为40m的凯威特型单层球面网壳结构进行风荷载作用下的时程响应分析,考虑3种矢跨比的影响(1/8、1/5、1/4),总结风振响应的变化规律及其影响因素。计算得出该结构的位移风振系数和内力风振系数均为2.5~3.0。
The wind vibration coefficient is an important parameter for structural wind load calculation and wind resistance design. In this paper, a linear autoregressive filter is used to simulate the wind field considering the temporal and spatial correlation. The finite element analysis software ANSYS is used to simulate a 40-meter-wide Kaiweit type single-layer spherical reticulated shell under wind load. The analysis of the time-history response takes into account the influence of the three kinds of vector span ratios (1/8, 1/5, 1/4), and summarizes the variation law of wind-induced vibration and its influencing factors. It is calculated that both the displacement wind vibration coefficient and the internal force wind vibration coefficient of the structure are 2.5-3.0.