Study on the force transfer characteristics of the transverse joints of high arch dams considering the spherical keyway

Abstract

In order to reduce temperature stress, transverse joints are often used to divide large concrete structures into several pieces. In order to improve the structural integrity, keyways are often provided on the joint surface to compensate for the enhancement of the joint surface shear resistance and improve the structural integrity. In the design of high arch dams, the application of spherical keyways on the transverse joints are more and more widespread. Due to the huge workload of simulating the spherical keyway densely distributed on the joint surface, there are few related results that accurately simulate the transverse joint keyway and truly reflect the force transmission characteristics of the keyway of high arch dams during earthquakes. In order to study the force transmission characteristics of the spherical keyway in the high arch dam during the seismic process, this paper proposes a parametric simulation modeling method for the high arch dam considering the spherical keyway of the transverse joint, and establishes the foundation-water-dam dynamics considering the spherical keyway. The calculation model uses high-performance parallel computing technology for calculation and analysis. The relationship between the high stress area of the keyway surface and the opening of the transverse joint, and the force transmission characteristics of the location of the maximum shear stress in the high arch dam during a strong earthquake are studied in detail.