Far field energy dissipation for high intake tower bedrock based on wave motion theories

Intake tower is set in the L-shaped foundation, which is the key portion of the power generation and flood discharge system, the structure performance and security relate to the normal operation of hydropower station or even the whole safety of the dam. In addition to general structure-foundation dynamic interaction, intake tower seismic performance should consider the impact of tower back rock. Traditional seismic analysis majority use fixed boundary model and not consider the mass of foundation, which introduces nonexistent reflection seismic wave. In order to eliminate impact of nonexistent reflection seismic wave introduced by fixed boundary and truly simulate the structure-foundation dynamic interaction, implement visco elastic artificial boundary by the redevelopment of ABAQUS finite element software. Analyze the impact on intake tower of different wave input direction. The results are significant to set up the evaluation criteria of structural safety.