水平地震作用下框架高度对钢筋用量的影响

Influence of framework height on steel quantity under horizontal seismic action

为了在建筑抗震设计中节省钢筋用量,提出了一种优化钢筋混凝土框架结构单位面积配筋量的方法.该方法探索楼层数m变化对构件内力分布和配筋量的影响,将一个矩形规则建筑作为研究对象,采用底部剪力法计算其在水平地震荷载影响下的构件内力,从而得到m与构件配筋体积之间的函数关系,进而转化为m与单位面积配筋量之间的关系.以m为优化变量,利用Matlab进行快速计算,并通过具体案例进行演示.结果表明,该方法具有一定的可行性,并得到m的最佳范围为6-11.

In order to save the steel quantity in the seismic design of buildings, a method of optimizing the steel quantity for per unit area of reinforced concrete frame structure was proposed. The influence of the change in the floor number m on the internal force distribution and steel quantity of components was investigated. A rectangular and regular building was taken as the research object, and the internal force of components under horizontal seismic action was calculated with the base shear method, and thus the function relationship between m and steel volume of components were obtained, which could be further converted into the relationship between m and steel quantity for per unit area. Taking m as the optimization variable, the quick calculation was conducted with Matlab, and the demonstration was performed with a specific case. The results show that the proposed method has certain feasibility, and the optimal range of m is 6 - 11.