配筋砌块短肢砌体剪力墙抗剪性能及承载力试验研究

Experimental research on shear capacity of reinforced block short-leg masonry shear wall

通过两片T形截面墙片在恒定竖向荷载下的低周反复荷载试验,研究了墙片发生剪切破坏时的破坏过程、破坏形态、受力性能、变形能力和耗能能力。试验结果表明,发生剪切破坏时,配筋砌块短肢砌体剪力墙与钢筋混凝土短肢剪力墙具有相似的破坏形态。根据国内59片符合配筋砌块短肢砌体剪力墙基本要求的配筋砌块砌体剪力墙抗剪承载力试验数据,考虑了灌孔砌体强度、剪跨比、竖向压力、水平钢筋等因素的影响,给出了与试验数据吻合较好的配筋砌块短肢砌体剪力墙抗剪承载力计算公式。

Under constant vertical loading, the pseudo-static tests of two T cross-section samples were carried out to study the shear performance of reinforced block short-leg masonry shear wall. The failure process and mode, capacity, load-deformation relationship, and energy-dissipation capabilities were studied in the shear failure tests. Experimental results show that the failure mode and ductility of the reinforced block short-leg masonry shear wall are similar to that of the reinforced concrete short-leg shear wall. Based on the shear capacity data of the collected 59 shear failure tests of reinforced concrete masonry shear wails which are included in reinforced block short-leg masonry shear wall, formula for shear capacity is proposed taken into the factors including masonry strength, shear span ratio, vertical load, and horizontal reinforcement. The formula shows a good correlation with the experimental data.