The Free Vibration Characteristics of a Concrete Arch Gravity Dam Using Finite Element Technique

K, Nallasivam

doi:10.22059/ceij.2024.369144.1990

The Free Vibration Characteristics of a Concrete Arch Gravity Dam Using Finite Element Technique

Articles in Press

Author

Nallasivam K

Assistant Professor, Corresponding author, Department of Civil Engineering, National Institute of Technology (NIT) Hamirpur -177001, Himachal Pradesh, India

10.22059/ceij.2024.369144.1990

Abstract

Purpose of the paper- This study aims to find out the free vibration of an arch dam, which must be recognized before performing a dynamic analysis of the dam due to hydrodynamic and earthquake forces.
Design/Methodology/Approach- The present study involves the free vibration analysis of an arch dam for dam amid soil interaction, dam with no soil interaction, and dam among soil and reservoir system using finite element software ANSYS.
Findings- The findings of this study include an estimation of the natural frequency and mode shape of various dam systems by free vibration analysis. The natural frequency of the dam is found to be lower than that of a dam with fixed support when foundation interaction is taken into account, which is related to a reduction in stiffness and an increase in the mass of the vibrating system.
Originality/Value- This paper presents the free vibration analysis of arch dams for dams amid soil interaction, dams with no soil interaction, and dams among soil and reservoir systems using the finite element software ANSYS.

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