影响高层框剪结构楼板刚性的参数

从按刚、弹性楼板计算框剪结构的底层中间框架柱剪力误差值的分析入手 ,建立了一个由弹簧支承的水平深梁的模型。以此剪力误差值作为衡量楼板刚性的指标并提出楼板剪切刚度的概念。从理论上证明楼板的刚性同地震烈度无关 ;通过对影响楼板刚性的各个因素进行分析比较 ,得出楼板的长宽比是影响楼板刚性的主要因素 ,而增加楼板厚度并不是增加楼板刚性的有效途径 ;不能单纯地根据楼板长宽比的范围进行刚性楼板的判断 ,也不能简单地根据楼板与剪力墙的刚度比进行刚性楼板的判断

PARAMETERS OF AFFECTING THE FLOOR RIGIDITY OF FRAME-SHEAR WALL STRUCTURE

A deep beam model with spring bearing is given,based on the analysis of middle frame of frame and shear wall structure ground floor.Comparing rigid assumption to elastic assumption,shear error of frame is worked out,which is index of floor rigidity.IN this paper,for the first time,floor stiffness is denoted as shear stiffness.Conclusions are drawn that floor rigidity is independent of earthquake intensity and the most effect factor to floor rigidity is floor length to width ratio.To enhance floor rigidity,not means to increase floor thickness.Floor rigidity has relations not only to floor stiffness,but also to stiffness and location of anti-shear member.Neither floor length to width ratio nor stiffness ratio of floor to shear wall should be the guild line of rigid floor.