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防屈曲支撑是一种效果良好的减震装置,由于其“小震经济、中震不坏、大震易修”的优点,有望成为新型的高性能装置从而应用于大跨度空间结构振动控制中.以一50m跨度的双层柱面网壳为实例,采用非线性时程分析的方法研究了柱面网壳结构在加入防屈曲支撑后的轴力及位移减震效果,通过不同的时程输入及不同支撑布置方式,得出了合理的支撑布置方式,在最优的布置方式下,位移减震效果可达27%,轴力减震效果可达47%,可见防屈曲支撑在双层柱面网壳中的减震效果较为理想,从而可以将其推广应用于其他形式的大跨度空间结构.
Buckling support is a kind of good damping device. It is expected to become a new type of high-performance device which can be applied to the vibration of long-span space structures due to its advantages of small earthquake economy, moderate earthquake damage and easy earthquake repair. In this paper, a two-layer cylindrical reticulated shell with a span of 50m is taken as an example to study the axial force and displacement damping effect of cylindrical reticulated shell structure with anti-buckling support by nonlinear time-history analysis. Time-course input and different support layouts, the reasonable support arrangement is obtained. Under the optimal arrangement, the displacement damping effect can reach 27% and the axial force damping effect can reach 47%. It can be seen that the anti-buckling support The shock absorption effect in double-layer cylindrical reticulated shell is ideal, so it can be widely applied to other forms of large-span space structure.