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为提高条石干砌石墙的抗震性能,采用钢筋网片改性砂浆对其进行加固。对4片不同加固参数的条石墙体进行低周水平往复加载试验,重点研究改性水泥砂浆强度、钢筋强度及加固方式(单面加固和双面加固)对加固石砌墙体的破坏形态、承载能力、滞回曲线、骨架曲线、耗能能力等抗震性能的影响。试验结果表明:采用钢筋网片砂浆面层对墙体进行加固,能够有效提高条石墙体的受剪承载力和滞回耗能能力;采用双面加固或提高改性砂浆强度可进一步提高墙体受剪承载力;墙体采用双面加固的承载力提高幅度是单面加固墙体的3倍以上。基于研究结果提出了采用钢筋网片改性砂浆加固条石干砌石墙受剪承载力的计算公式,可供后续研究和工程实践参考。
In order to improve the anti-seismic performance of dry stone masonry walls, reinforced steel mesh modified mortar is used to reinforce it. Four different reinforcement parameters of the stone wall of the low-cycle horizontal reciprocating loading test, focusing on the study of the strength of modified cement mortar, steel strength and reinforcement methods (one-sided reinforcement and double-sided reinforcement) of the reinforced stone wall damage morphology , Bearing capacity, hysteresis curve, skeleton curve, energy dissipation capacity and other seismic performance. The test results show that the use of reinforced mesh mortar to reinforce the wall can effectively increase the shear capacity and hysteretic energy consumption of the stone wall. The use of double-sided reinforcement or to improve the strength of the modified mortar can further improve the wall The body is subject to shear bearing capacity; the bearing capacity of the wall reinforced with double-sided reinforcement is more than 3 times that of the single-sided reinforced wall. Based on the research results, the formulas for calculating the shear capacity of dry stone masonry walls reinforced with steel mesh modified mortar are proposed for future reference and engineering practice.