Seismic Analysis and Damage Evaluation of Pine Flat Concrete Dam

Abstract

Accurate seismic analysis of concrete dams has a great impact not only on design of the new dams but also on the stability assessment of the existing ones. In this regard, one of the challenging issues is to consider the dynamic effects of radiation damping due to the mass of the foundation rock on the seismic responses. In this paper, an absorbing boundary condition, which is comprised of the viscous boundary traction and a free-field column, has been adopted in time domain. Based on the adopted methodology, a finite element model has been prepared for Pine Flat concrete dam using ABAQUS. In order to evaluate the damage level, the concrete damage plasticity model has been assumed for the concrete constitutive relation. The damage level in concrete has been evaluated under Taft earthquake. In addition, the response spectrum that Pine Flat dam can endure has been determined using an endurance time analysis.