Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

Earth dams are 3-Dimensional, huge and inhomogeneous structures that interact with water and soil. They are the most common type of dams used in the world and developing countries like Iran. Seismic analysis of earth dam is very important in regions which have been subjected with earthquake impaction several times. Calculating the natural frequency of dams is the essential part for its seismic behavior analysis. So it is very important to present an appropriate solution for calculation of natural frequency. Natural frequency of earth dams is usually calculated by means of experimental correlations, shear beam analysis (base on the height of dam and shear wave velocity) and time historical dynamic analysis. The present study concerns a new formulation for natural frequency of earth dams by means of analytical method. In this method, shear wave velocity and height of dam are two parameters which are used for obtaining natural frequency. Geometry of dam body, rigidity of foundation, modulus of elasticity and Poisson's ratio are essential in calculating process. Results from proposed method are compared with case histories, numerical method and other formulations. Comparison shows that there is no significant difference in dams with various heights up to 100m.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 29th, 12:00 AM May 4th, 12:00 AM

Calculation of Natural Frequency of Earth Dams by Means of Analytical Solution

Chicago, Illinois

Earth dams are 3-Dimensional, huge and inhomogeneous structures that interact with water and soil. They are the most common type of dams used in the world and developing countries like Iran. Seismic analysis of earth dam is very important in regions which have been subjected with earthquake impaction several times. Calculating the natural frequency of dams is the essential part for its seismic behavior analysis. So it is very important to present an appropriate solution for calculation of natural frequency. Natural frequency of earth dams is usually calculated by means of experimental correlations, shear beam analysis (base on the height of dam and shear wave velocity) and time historical dynamic analysis. The present study concerns a new formulation for natural frequency of earth dams by means of analytical method. In this method, shear wave velocity and height of dam are two parameters which are used for obtaining natural frequency. Geometry of dam body, rigidity of foundation, modulus of elasticity and Poisson's ratio are essential in calculating process. Results from proposed method are compared with case histories, numerical method and other formulations. Comparison shows that there is no significant difference in dams with various heights up to 100m.