Simulation of influence of multi-defects on long-term working performance of high arch dam

As an integrated structure, an arch dam is assumed to bear loads in its design consideration. However, multi-defects, such as cracks and the opening of transverse joints, are unavoidable during construction and operation. Multi-defects will reduce the structural integrity and stiffness of the dam and affect its working performance and degree of safety. In the current paper, a numerical model of defects and a simulation method of a high arch dam are introduced. The Chencun arch dam is analyzed as a case study. An entire course simulation analysis of the Chencun arch dam from construction to operation is carried out, through which the opening of the transverse and longitudinal joints, formation of cracks, and their influence on deformation and stress of the dam are studied. According to the results of the analysis, appropriate measures should be adopted to prevent the development of cracks, and observation should be strengthened for a more timely discovery of risks.