水平嵌筋加固砖砌体墙抗震性能试验研究

以嵌缝胶泥作为嵌缝材料，针对不同高宽比和不同配筋率的6片墙体进行了拟静力试验，探讨了嵌筋加固砖砌体墙的破坏特征、变形能力、承载能力、耗能能力、滞回特征及刚度退化等抗震性能，建立了以试验为基础的嵌筋加固砖砌体墙的抗剪承载力计算公式。研究结果表明:高宽比为1.8的试件，嵌筋墙体较无筋墙体水平抗剪极限承载力提高了17%~31%，延性提高了54%~83%；高宽比为0.5的试件，嵌筋墙体较无筋墙体水平抗剪极限承载力提高了13%~17%，延性提高了17%~20%，嵌筋加固墙体滞回环饱满，耗能能力有较大幅度提高，破坏形式由脆性破坏转变为延性破坏，嵌筋对墙体初始刚度的影响较小，给出的抗剪承载力公式计算值与试验值接近，为工程应用奠定了基础。

Experimental study on seismic performance of brick walls strengthened with embedded horizontal steel bars

Quasi-static tests of six clay brick masonry walls by using a new type of caulking mortar, which have different aspect ratios and different reinforcement ratios, were carried out. The failure characteristics, deformation capacity, shear capacity, energy dissipation capacity, hysteretic behavior and stiffness degradation of the brick masonry walls were investigated. Based on experiment results, a formula for the shearing capacity of the strengthened brick masonry walls is proposed. The results indicate that with the aspect ratio of 1.8, the ultimate shear capacity of the strengthened brick masonry walls was improved by 17%~31%, while the ductility of these walls was improved by 54%~83%; with the aspect ratio of 0.5, the ultimate shear capacity of the strengthened brick masonry walls was improved by 13%~17%, while the ductility of these walls was improved by 17%~20%, the strengthened walls also have a more plump hysteretic curve, which means a higher capacity of energy dissipation and the failure mechanism becomes a ductile type rather than a brittle type; the embedding process has little influence on the initial stiffness of the masonry walls. The results of the shear capacity obtained from the formula are in good agreement with the test results, which provides a good foundation for engineering applications.