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http://dx.doi.org/10.12989/csm.2013.2.1.085

Strain-based seismic failure evaluation of coupled dam-reservoir-foundation system  

Hariri-Ardebili, M.A. (Department of Civil Environmental and Architectural Engineering, University of Colorado at Boulder)
Mirzabozorg, H. (Department of Civil Engineering, K. N. Toosi University of Technology)
Ghasemi, A. (Department of Civil Engineering, K. N. Toosi University of Technology)
Publication Information
Coupled systems mechanics / v.2, no.1, 2013 , pp. 85-110 More about this Journal
Abstract
Generally, mass concrete structural behavior is governed by the strain components. However, relevant guidelines in dam engineering evaluate the structural behavior of concrete dams using stress-based criteria. In the present study, strain-based criteria are proposed for the first time in a professional manner and their applicability in seismic failure evaluation of an arch dam are investigated. Numerical model of the dam is provided using NSAD-DRI finite element code and the foundation is modeled to be massed using infinite elements at its far-end boundaries. The coupled dam-reservoir-foundation system is solved in Lagrangian-Eulerian domain using Newmark-${\beta}$ time integration method. Seismic performance of the dam is investigated using parameters such as the demand-capacity ratio, the cumulative inelastic duration and the extension of the overstressed/overstrained areas. Real crack profile of the dam based on the damage mechanics approach is compared with those obtained from stress-based and strain-based approaches. It is found that using stress-based criteria leads to conservative results for arch action while seismic safety evaluation using the proposed strain-based criteria leads to conservative cantilever action.
Keywords
dam-foundation interaction; massed foundation; strain-based criteria; damage mechanics; infinite elements;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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