配筋砌体剪力墙模型结构振动台试验

Study of shaking table test of reinforced masonry shear walls model structure

为确定配筋砌块砌体剪力墙结构在不同地震动强度作用下的抗震性能和变形能力,完成了1个10层1/4缩尺的全灌芯配筋砌块砌体剪力墙结构模型模拟地震振动台试验.通过试验,得到了结构在不同强度地震作用下的加速度反应、位移反应和钢筋应变反应.分析了模型在弹性、开裂、破坏各阶段的动力特性及动力反应.计算得到了模型结构的自振频率和不同地震动强度作用后模型频率的变化.试验结果表明,此种结构体系具有较好的抗震能力和较强的变形能力,能够满足7度抗震设防的要求.

The paper intends to investigate the seismic performance and deformation capacity of reinforced block masonry shear walls under different ground motion intensites. The 10-story 1 - 4 scale model for shaking table test of fully grouted reinforced block masonry shear walls model structure has been designed and constructed in the Structural Lab of Institute of Engineering Mechanics, China Earthquake Adminis- tration. The acceleration response, displacement response and steel strain response of the structure are extracted from the test. The dynamic characteristics and dynamic response of the model are analyzed for elastic, cracking and damage phases. Natural frequency of vibration for the model is derived; and the frequency law is calculated under different ground motion intensities. It is demonstrated that the fully grouted reinforced masonry shear walls have good seismic performance and deformation capacity; and they can meet the requirement of seismic intensity Ⅶ.