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

Document Type : Research Papers

Authors

1 P.G. Student of Structural Engineering, Department of Civil Engineering, National Institute of Technology (NIT) Hamirpur, Himachal Pradesh, India.

2 Assistant Professor, Department of Civil Engineering, National Institute of Technology (NIT) Hamirpur, Himachal Pradesh, India.

Abstract

The objective of this study is to ascertain the free vibration analysis of an arch dam, which needs to be identified prior to doing a dynamic analysis of the dam in response to hydrodynamic and seismic loads. This work focuses on analyzing the free vibration analysis of an arch dam under several conditions: dam-soil contact, dam without soil interaction, and dam in a soil-reservoir system. The analysis is conducted using the finite element software ANSYS. This study's findings include an estimation of the natural frequency and mode shape of various dam systems by free vibration analysis. When foundation interaction is taken into account, the dam's natural frequency is found to be lower than that of a dam with fixed support, which is related to a reduction in stiffness and an increase in the vibrating system's mass. This paper focuses exclusively on analyzing the natural vibration of a concrete arch-gravity dam structure. Dam engineers can conduct additional evaluation of this research to enhance the structural effectiveness and functionality of the dam. Additionally, this research can serve as a basis for analyzing the concrete arch-gravity dam's response to different dynamic loads.

Keywords

References

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Civil Engineering Infrastructures Journal
Volume 58, Issue 2
December 2025
Pages 265-285

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History

  • Receive Date: 04 December 2023
  • Revise Date: 21 March 2024
  • Accept Date: 29 May 2024

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