Journal of Materials and Engineering Structures
Volume 13, Numéro 1, Pages 147-162
2026-03-30

Evaluation Of Dynamic Responses Of Concrete Gravity Dam Considering Dam-reservoir-foundation Interaction With Inclined Absorptive Reservoir Bottom



Authors : Das Santosh Kumar . Mandal Kalyan Kumar . Neyogi Arup Guha .

Abstract

The present paper shows the dynamic responses of concrete gravity dam considering inclined reservoir bed. Responses of gravity dam influenced by the adjacent reservoir and soil foundation. Interaction between dam, reservoir and foundation can give the authentic idea about the responses of the gravity dam subjected to dynamic excitation. Hydrodynamic pressure originated at the face of the gravity dam due to dynamic force. Bottom absorption and geometrical profile of the reservoir influence the behavior of the reservoir along with the adjacent gravity dam. In the present study, dam-reservoir-foundation system has been analyzed by direct coupling approach due to harmonic excitation including the fluid-structure and soil-structure interaction simultaneously. Reservoir bottom is considered as inclined and absorptive. Geometry of the dam, reservoir and foundation are discretized using finite element technique. Suitable non-reflective boundary conditions are applied along the truncated surface of the reservoir and soil foundation. Dynamic analysis of the dam, reservoir and foundation coupled system has been performed by applying Newmarks’ technic. Responses of the reservoir, dam and foundation have been observed for different inclination of reservoir bottom.

Keywords

Dynamic excitation ; Finite element ; Hydrodynamic pressure ; Fluid-structure interaction

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