适量注芯混凝土砌块结构模型振动台试验研究

通过对6层适量注芯混凝土小型空心砌块配筋砌体结构模型进行地震模拟振动台试验，分析结构体系的结构动力特性、加速度放大反应、最大层间位移角等，研究其在抗震设防烈度为7度构造措施条件下的结构抗震性能、屈服机制。试验结果表明：配筋砌体模型结构在地震作用下的整体变形仍以剪切变形为主；在输入不同地震波、不同峰值加速度时，结构横向所能承受的输入峰值加速度的平均值比纵向要高，横向变形大于纵向变形，说明结构纵向抗震能力要强于横向；圈梁、构造柱以及水平拉结筋构成的约束体系作用明显，结构在基本烈度地震作用下抗破坏能力较强，能够满足抗震规范规定的在7度区“大震不倒”的要求；结构在罕遇地震作用下也具有相当的抗震能力。

Experimental study on seismic performance of reinforced masonry structure with small-size hollow concrete blocks

The paper focused on the seismic performance of a six-story reinforced concrete hollow block masonry structure with injection efficiency,through earthquake simulation test by shaking table.Based on previous research,the seismic performance,yielding mechanism and seismic capacity of the structure with construction measures under intensity 7 were examined.The experimental results show that monolithic deflection of reinforced masonry structure under different earthquake waves mainly exhibits shear deformation pattern.While inputting different peak acceleration of earthquake waves,the average of maximum accelerations of lateral walls is higher than longitudinal walls and lateral deformation is greater than lengthwise direction.Longitudinal seismic capacity is higher than lateral one.The experiment results also show that the confinement effects of tie beams,constructional columns and horizontal tie bars are obvious.The tested model definitely satisfies the requirement of ’collapse prevention under unexpected rare earthquake’ at intensity 7 seismic area.Adequate seismic capacity under rare earthquake can be obtained for the six-story concrete block building with tie beams and columns,allowing reasonable increases in code-specified maximum number of story and the maximum total height of concrete hollow blocks masonry structures with tie beams and columns and tie bar is permissible.