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通过对16个复合砂浆加固砌体试件进行砌体-复合砂浆界面的抗剪试验,得到了界面的破坏形态、抗剪强度和荷载-滑移曲线。试验结果表明:剪切销钉能显著提高粘结面的抗剪强度,并且随剪切销钉植筋面积增加界面抗剪强度也随之增大;剪切销钉能改变界面的破坏模式,增大界面破坏时的滑移变形;剪切销钉植筋深度是影响界面抗剪强度和破坏形式的另一个主要因素,砌体中剪切销钉的最小植筋深度应取10倍销钉直径;水泥基界面剂对界面抗剪强度有负面影响,因此用水泥复合砂浆加固砌体结构时不宜使用水泥基界面剂。在试验研究基础上,拟合了考虑剪切销钉植筋面积的砌体-复合砂浆界面抗剪强度公式。
The failure mode, shear strength and load-slip curve of the interface were obtained through the shear tests on the interface of masonry-composite mortar with 16 composite mortar reinforced masonry specimens. The test results show that the shear pins can significantly improve the shear strength of the bonding surface, and the shearing strength increases with the increase of the anchorage area of the shear pins. The shear pins can change the failure mode of the interface and increase the interface Another is the main factor that influences the shear strength and failure mode of the interface. The minimum diameter of the cutting pin in masonry should be ten times the pin diameter. The cement-based interface agent The shear strength of the interface has a negative impact, so cement mortar composite structure should not be used when cement-based interface agent. Based on the experimental study, the shear strength formula of masonry-mortar interface considering shear pin anchorage area was fitted.