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A Comparative Assessment of the Seismic Response of an Earthen Dam Using Analytical Simulation and Empirical Methods


Affiliations
1 Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
2 Civil Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
 

This article presents the permanent deformation of an earthen dam located in the vicinity of a safety related structure for Mw = 6.5 design basis earthquake. A non-linear 2D dynamic analysis using a real earthquake motion compatible with the design spectrum was performed to check the earthquake-induced deformations of the dam. Deformations of the dam were also estimated by semi-empirical and empirical methods suc has Seed and Makdisi’s method, Newmark’s double integration method, Jansen’s method and Swaisgood’s method. Results from different methods are compared to obtain a range for the value of permanent deformations of the dam. It is observed that the lateral deformation obtained by Seed and Makdisi’s method is the highest while Jansen’s method predicts the highest crest settlement. The crest settlement of the dam is found to vary between 11.8 mm and 17.8 mm, which is within the safety limits according to IITK-GSDMA guidelines.

Keywords

Earthen Dam, Dynamic Analysis, Deformations, Non-Linear Finite Element Analysis.
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  • A Comparative Assessment of the Seismic Response of an Earthen Dam Using Analytical Simulation and Empirical Methods

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Authors

Srijit Bandyopadhyay
Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
Raj Banerjee
Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
Aniruddha Sengupta
Civil Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
Y. M. Parulekar
Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
G. R. Reddy
Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India

Abstract


This article presents the permanent deformation of an earthen dam located in the vicinity of a safety related structure for Mw = 6.5 design basis earthquake. A non-linear 2D dynamic analysis using a real earthquake motion compatible with the design spectrum was performed to check the earthquake-induced deformations of the dam. Deformations of the dam were also estimated by semi-empirical and empirical methods suc has Seed and Makdisi’s method, Newmark’s double integration method, Jansen’s method and Swaisgood’s method. Results from different methods are compared to obtain a range for the value of permanent deformations of the dam. It is observed that the lateral deformation obtained by Seed and Makdisi’s method is the highest while Jansen’s method predicts the highest crest settlement. The crest settlement of the dam is found to vary between 11.8 mm and 17.8 mm, which is within the safety limits according to IITK-GSDMA guidelines.

Keywords


Earthen Dam, Dynamic Analysis, Deformations, Non-Linear Finite Element Analysis.

References





DOI: https://doi.org/10.18520/cs%2Fv113%2Fi05%2F902-910