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为研究条石砌筑石墙的抗震性能及滞回特性,进行了5片干砌甩浆石墙试件的低周水平反复荷载试验。主要研究参数包括砂浆强度和压应力。通过试验研究了干砌甩浆承重石墙的破坏形态、强度、滞回曲线、骨架曲线、变形能力、耗能能力和刚度退化规律。试验结果表明:石墙的最终破坏形态主要受压应力水平的影响;受剪承载力随砂浆强度和压应力水平的提高而增加,但提高压应力水平对石墙受剪承载力的影响更加显著;条石砌筑石墙的滞回曲线呈现饱满的梭形,表现出良好的耗能性能,其与砖砌体等其它砌体结构的滞回环在弹塑性阶段呈现明显的滑移捏缩现象存在明显差异。
In order to study the seismic performance and hysteretic behavior of masonry stone masonry walls, five low-level horizontal cyclic loading tests of dry masonry limestone wall specimens were carried out. The main research parameters include mortar strength and compressive stress. The failure mode, strength, hysteresis curve, skeleton curve, deformation capacity, energy dissipation capacity and stiffness degradation of drywall slurried load-bearing stone walls were studied through experiments. The results show that the ultimate failure mode of stone wall is mainly affected by the compressive stress level. The shear strength increases with the increase of mortar strength and compressive stress level. However, the effect of increasing the compressive stress level on the shear capacity of stone wall is more significant The hysteretic curves of stone masonry walls show a full fusiform shape and exhibit good energy dissipation performance. The hysteresis loops of other masonry structures, such as brick masonry, show a significant slip-pinch phenomenon during the elasto-plastic phase There are obvious differences.