The effect of interaction between reservoir and multi-layer foundation on the dynamic response of a typical arch dam (Karaj dam)‎ to“P” And “S” waves

Abstract EN

Analysis of the dynamic response of a three-dimensional arch dam is conducted taking into account the effects of dam–reservoir and dam-foundation interactions.

The Karaj arch-dam in Iran is considered as a case study.

The dam, fluid, and foundation domains are treated as substructures and modeled with boundary elements.

The foundation domain is assumed to be layered and infinite.

This study focuses on the effect of geotechnical conditions on the dynamic response of the dam to harmonic P and S waves.

Latest investigations show that the foundation flexibility leads to a reduction in the response through radiation of energy.

In this research, it is shown that the effect of soil layers may cause amplification of response in some frequency ranges.

This study emphasizes the necessity of comprehensive modeling for site effects to resolve such problems.

Also, by identifying the bands of excitation frequencies to which the dam may be more sensitive, it helps in the selection of the most critical earthquake records (as random phenomena) to be used in time domain analysis.s