柳北换流站大跨度网架支座方案分析研究

Analysis and Research on Grid Support Scheme of Liubei Converter Station

柳北换流站阀厅为大跨度结构,阀厅结构采用矩形格构式钢柱支撑大跨度网架屋盖,网架屋盖的支撑条件及结构模拟对计算结构有较大的影响。对网架的平板支座方案和球铰支座方案进行比较分析,球铰支座方案相比于平板支座方案能减小支座的水平刚度,降低网架传给下部结构的水平力,提高整体结构的抗震性能。

Liubei converter station valve hall is a large span structure,the large span steel grid roof is supported by rectangular lattice steel column,the supporting conditions of the steel grid roof have a great influence on the calculation results.The comparison and analysis of flat steel bearing scheme and slip spheric bearing scheme shows the slip spheric bearing scheme can reduce horizontal stiffness of the support and the horizontal force transmitted from the grid to the substructure,improve the seismic performance of the structure.