劲性支撑穹顶结构风振响应分析

发布时间：2018-05-15 13:22

本文选题：劲性支撑穹顶 + 风速时程模拟　；参考：《空间结构》2016年04期

【摘要】：劲性支撑穹顶结构是一种刚柔结合的新型预应力空间结构,具有跨度大、自重轻等特点.利用线性滤波器法中的AR法,结合结构风压谱随高度变化规律,编制了脉动风速时程模拟程序.采用时域分析方法,研究了劲性支撑穹顶结构在水平风和竖向风单独作用及共同作用下的响应,并分析了初始预应力、矢高、跨度及环向等分数对结构风振响应的影响.研究表明,水平风与竖向风共同作用下结构节点位移均值位于两者单独作用于结构时的位移均值之间,预应力对结构风振响应的影响显著,节点位移响应均值随矢高或跨度增加而变大,环向等分数减小会导致结构的竖向位移响应均值及幅值增大.将风振系数进行统计分析,得到了便于工程设计人员应用的风振系数.
[Abstract]:The rigid support dome structure is a new type of prestressed space structure with rigid and flexible combination, which has the characteristics of large span and light self weight. By using the AR method in the linear filter method and combining the wind pressure spectrum with the height variation law, the time-domain simulation program of pulsating wind speed is compiled. The structure of the stiffening support dome is studied by the time domain analysis method. The influence of the initial prestress, the height, the span and the circumferential direction on the wind vibration response of the structure is analyzed. The study shows that the mean value of the displacement of the structure is between the horizontal and the vertical wind. The effect of the vibration response is remarkable, the mean of the displacement response of the node increases with the increase of the height or the span, and the decrease of the ring direction will lead to the increase of the mean and the amplitude of the vertical displacement response of the structure.

【作者单位】：北京工业大学空间结构研究中心;
【基金】：国家自然科学基金项目(51378031) 北京市自然科学基金项目(8132022)
【分类号】：TU399;TU311.3

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