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通过对混凝土–岩石胶结面剪切破坏过程中剪应力–位移曲线的分析,假设混凝土–岩石胶结面剪应力由混凝土与岩石之间的胶结作用和摩擦效应共同承担,从而建立考虑峰后胶结损伤的胶结面力学模型。室内混凝土–岩石剪切试验结果的反演分析表明,该模型可以很好地反映胶结面剪切破坏过程。利用建立的混凝土–岩石胶结面力学模型,对拟建的芙蓉江大桥拱座抗滑稳定性进行三维计算分析,结果表明:桥梁荷载下拱座–基岩胶结面剪切应力小于其抗剪强度,胶结面变形以弹性变形为主,量值较小,拱座–基岩胶结面不会产生剪切破坏。
Based on the analysis of the shear stress-displacement curve during the shear failure of concrete-rock cemented surface, it is assumed that the shear stress of the cemented-rock cemented surface is shared by the cementation and frictional effect between the concrete and the rock, so as to consider the post-peak cementation damage The mechanical model of cemented surface. Inverse analysis of the results of laboratory concrete-rock shear tests shows that this model can well reflect the shear failure process of cemented surface. Using the established model of concrete-rock cemented surface mechanics, the three-dimensional calculation of the anti-sliding stability of the Furong River Bridge abutment is carried out. The results show that the shear stress of the abutment-bedrock cemented surface under the bridge load is less than its shear strength , The deformation of the cementing surface is mainly elastic deformation, the value is small, and the abutment-bedrock cementing surface will not produce shear failure.