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根据锚杆或钢筋端部锈蚀一般是椭球面轮廓线的假定,给出了三维锈蚀层面的数学模型与任一点锈蚀层面厚度的计算公式.然后,把三维锈蚀层面的任一点看成虚拟不连续位移的板单元模型,给出板单元不连续位移作用下的三维问题的基本解.再根据锈蚀壳层面的3个基本假设,建立了三维数值离散化模型,从而导出了适用于三维数值分析的虚拟锈蚀层面的应力边界方程.最后,应用三维有限元法对某巷的锚喷结构进行了数值模拟计算.
According to the assumption that the corrosion of bolt or steel bar end is generally ellipsoidal contour, the mathematical model of three-dimensional rust layer and the formula of thickness of rust layer at any point are given.After that, any point of the three-dimensional rust layer is regarded as a virtual discontinuity Displacement of the plate element model gives the basic solution to the three-dimensional problem under the discontinuous displacement of the plate element.According to the three basic assumptions of the corrosion shell surface, a three-dimensional numerical discretization model is established, and the three-dimensional numerical discretization model that is suitable for three-dimensional numerical analysis The stress boundary equation of the virtual rust layer.Finally, the numerical simulation of the anchor-spray structure of an alley is carried out by using the 3D finite element method.