巨型框架中主、次框架的抗侧刚度比的限值研究

随着主框架抗侧刚度比的增加,巨型框架结构的两级受力性能就更加明显,但随着主框架的进一步加强,主框架抗侧刚度对整个巨型框架的贡献不可能无限增加,总是存在1个极限值。以相邻两主框架梁间部分为计算单元,对主框柱线刚度与次框架柱线刚度之比、主框架柱抗侧刚度占整层框架柱抗侧刚度之比μ进行研究。结果表明,主、次框架的抗侧刚度比的限值与次框架层数、跨数、次框架梁柱线刚度比、主框架梁柱线刚度比i主有关;所得出的不同参数条件下的限值可供设计参考。

Limited value of anti-side rigidity ratio of main frame to hypo-frame in mega-frame structures

The polar performances of mega-frame structures were more evident along with the increase of the anti-side rigidity of frame frames.However,when the main frames became strong more and more,it was impossibility that the contribution of the frame frames to the whole mega-frame structures increase infinitely and there was a limit value.The calculational cell was selected from the two conjoint main frames,and the two coefficients were quoted such as the column linear rigidity ratio of the main frames to hypo-frames and the column anti-side rigidity ratio of the main frames to the whole mega-frame structures.The results show that the limited values of anti-side rigidity ratio of main frames to hypo-frames are related to four factors,i.e.,the layer number of hypo-frames,the ratio of hypo-frames and span number and the column linear rigidity ratio of main frames to hypo-frames.The given limited values under various parameters can be the reference to design.