双层曲面球形网壳结构支座刚度研究

RESEARCH ON THE STIFFNESS OF SUPPORTS OF DUAL-LAYER CURVED SURFACE SPHERICAL RETICULATED SHELL

根据实际工况建立双层曲面球形网壳的有限元分析模型,研究网壳架体与混凝土柱之间连接支座分别采用固定铰支座、滑动铰支座和弹性铰支座3种情况对网壳结构的影响,以及采用不同水平支承刚度的弹性铰支座时网壳结构杆件受力性能的变化情况。研究结果表明,采用弹性铰支座时网壳结构杆件轴力比采用固定铰支座和滑动铰支座小;从支座选型对网壳结构杆件受力的影响来看,采用有一定支承刚度的弹性铰支座对结构更有利;弹性支座的刚度建议取为2 000 k N/m。

According to the actual working conditions,the finite element analysis model of dual-layer curved surface spherical reticulated shell structure was built,the influence of reticulated shell structure was studied by fixed hinge support,sliding hinge support and flexible hinge support,which was used for the connection between the reticulated shell frame and the concrete column,and the changes of mechanical properties of reticulated shell bar were studied by flexible hinge support of different horizontal support. The results showed that when using the flexible hinge support stiffness,the axial force ratio of the reticulated shell structure were smaller than that of the fixed hinge support and the sliding hinge support,in the view of the influence of support type selection on the stress of the shell structure,elastic hinge support with certain supporting stiffness was more favorable to the shell structure; The stiffness of the elastic hinge support was recommended as 2 000 kN/m.