Seismic Performance Evaluation and Analysis of Major Arch Dams Considering Material and Joint Nonlinearity EffectsReport as inadecuate




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ISRN Civil EngineeringVolume 2012 2012, Article ID 681350, 10 pages

Research ArticleDepartment of Civil Engineering, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran

Received 10 September 2011; Accepted 18 October 2011

Academic Editor: D. N. Singh

Copyright © 2012 Mohammad Amin Hariri Ardebili and Hasan Mirzabozorg. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Seismic failure of major concrete dams can be disastrous due to sudden release of reservoir water. At the present study, 203 m DEZ arch dam was selected as case study, and two types of nonlinearity were incorporated in seismic analysis of dam, joint nonlinearity and material nonlinearity. The finite element model of the dam, soil, and water was excited using multicomponent maximum design earthquake record which was extracted from seismic hazard analysis of the dam site. Also seismic performance of the dam was evaluated based on linear analysis. The extension of overstressed areas, demand-capacity ratio, and cumulative inelastic duration were used to identify the necessity of nonlinear analysis. It was found that when contraction joints between dam blocks are modeled, the direction of the principal stresses and their distribution patterns are changed meaningfully. In addition, overstress surfaces on the dam body change in comparison with the model without contraction joints.





Author: Mohammad Amin Hariri Ardebili and Hasan Mirzabozorg

Source: https://www.hindawi.com/



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