单跨无洞框支墙梁抗震受力性能研究

以单跨无洞框支墙梁为研究对象 ,通过两榀接近足尺的墙梁试件的试验研究 ,揭示了竖向荷载作用下 ,以及竖向荷载与水平荷载联合作用下框架支承墙梁的基本受力特征。研究表明 ,竖向荷载单独作用下 ,墙梁存在明显的组合作用 ,构造柱可帮助砌体承担相当比例的竖向荷载 ;在水平力作用下 ,作用在墙梁顶面的均匀分布竖向荷载在向下传递至托梁顶面的过程中 ,会偏移至倾覆弯矩受压一侧梁端 ,并可能使该侧墙角砌体压碎以及梁端明显的剪切破坏。

Research on Seismic Behaviors of Single-span Frame-supported Wall-beam

A research work has been done on single span frame supported wall beam with no hole. In this paper, based on the experimental results of two full scale specimens, the basic characteristics of load bearing mechanism with the vertical load exerted only or the vertical load exerted in combination with horizontal seismic load have been expounded. It shows that when only the vertically gravitational load was exerted on top of the wall, there was an evident composite arch action between the supporting frame beam and the upper brickwork. The tie columns at both ends of the wall would carry quite a large part of the whole vertical loads. When the seismic horizontal load was involved, the downward vertical load would shift to the beam end at the compression side of overturning moment. This may cause the crushing failure of brick masonry at lower corner of that side and a serious shear failure of the frame beam end at the same side as well.