巨型框架中主、次框架的抗侧刚度比的限值研究

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

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。

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 fi＇ames 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.