短梁抗剪加强型钢框架-波纹钢板墙结构参数分析

提出了一种短梁抗剪加强型钢框架-波纹钢板墙结构,通过对波纹钢板墙与框架柱之间的短梁进行抗剪加强,将边缘构件的轴力通过短梁抗剪有效传递至两边的框架柱,从而解决由于逐层累积作用导致边缘构件轴力过大的问题。同时,利用分析软件SAP2000,针对该类结构形式进行了基于Pushover的参数分析,考察了各种因素对边缘构件轴力、短梁剪力以及结构最大层间位移角的影响规律,其中,影响因素主要包括:宽跨比(波纹钢板墙宽度与柱距)、轴向刚度比(边缘构件与框架柱)和楼层层数。分析结果表明:边缘构件轴力随楼层层数和宽跨比的增大而增大,随刚度比的增大而减小;短梁剪力随宽跨比的增大而增大,随楼层层数的增加而减小,但与刚度比关系不大;结构最大层间位移角受宽跨比、刚度比的影响较小,随楼层层数的增加而略有增大。

Parametric Study on Steel Frame-Corrugated Steel Shear Wall Structures with Shear-Strengthened Short Beam

In this paper,a steel frame with corrugated steel shear wall is proposed.In this steel frame,the short beam between shear wall and column is strengthened in shear capacity in order to reduce the axial force of vertical boundary element by transferring to the boundary column more efficiently,because normally the axial forces of vertical boundary elements at the bottom of structure are excessively large due to the accumulation effect floor by floor.Meanwhile,using software SAP2000,aparametric analysis on the width ratio between the width of corrugated steel shear wall and column spacing,and the stiffness ratio between vertical boundary element and column,as well as the number of floors,was conducted to investigate the influence on the axial force of vertical boundary element,shear force of short beam and the maximum story drift.The analysis results indicated that the axial force of boundary elements can increase with larger number of stories,increasing width ratio,and smaller stiffness ratio.While the shear force of short beam can become larger with a larger width ratio and less stories.The stiffness ratio has negligible influence on the shear force.Besides,the maximum story drift has nothing to do with the width ratio and stiffness ratio,but can slightly increase with the number of stories.