配筋混凝土砌块砌体框支剪力墙模型房屋抗震性能试验研究

为研究配筋混凝土砌块砌体框支剪力墙房屋的抗震性能,通过对一幢按1/4缩尺比例建造的配筋混凝土砌块砌体框支剪力墙模型房屋进行子结构拟动力地震反应试验,研究了在各种加速度峰值地震作用下,这种结构体系的动力反应、破坏机理和倒塌机制,分析了试验模型的水平承载能力和破坏形态。试验结果表明,随着输入地震波的加速度峰值的增大,这种结构体系的地震反应由弹性阶段过渡到塑性阶段,最后底部框剪层承载力下降而临近倒塌;结构薄弱层在底部框剪层,最终破坏形态为剪切型;框架托梁与上部配筋混凝土砌块砌体剪力墙组成整体性能较好的组合深梁。这种结构体系应用于7度抗震设防区,具有较好的抗震性能。

Seismic behavior research of 1/4 scale frame-supported reinforced concrete masonry shear-wall building

The aseismic behavior of frame-supported reinforced concrete block masonry shearwall building has been studied.Substructure pseudynamic test method is adopted on the frame-supported reinforced concrete block masonry shearwall building constructed to 1/4 scale,the dynamic reaction,failure mechanism and collapse model of this kind of structure system have been investigated by acted variously peak value of the acceleration.The level capacity and failure model have been analyzed.The experimental results indicated that seismic action of this structure system transited from elastic phase to plastic phase till the failure of frame-shearwalls at the bottom,which was weakened.The final failure model of this system was shear deformations.The supported beam of the frame and reinforced concrete masonry shearwalls worked together as deep beams.This kind of structure system can be applied to the seismic zone with 7-degree earthquake intensity,and has comparatively good aseismic behavior.