The Influence of Initial Cracks on the Crack Propagation Process of Concrete Gravity Dam-Reservoir-Foundation Systems

摘要

A scaled-down 1:40 model of a gravity dam with the initial notch in the upstream wall is analyzed using the XFEM. Furthermore, the cracking process of Koyna dam including dam-reservoir-foundation interaction under the 1967 Koyna earthquake is also simulated numerically by employing the XFEM. The computed distribution of cracking damage is consistent with other numerical methods and the model experiment. Subsequently, a typical concrete gravity dam with different crack cases is employed as a numerical example. The effects of the initial crack position and length on the crack propagation and seismic response of dam-reservoir-foundation systems are studied.