Location
St. Louis, Missouri
Presentation Date
14 Mar 1991, 2:00 pm - 3:30 pm
Abstract
A simplified method of inelastic seismic analysis of earth dams developed by the authors is used to study the response of the San Fernando and Santa Felicia dams to accelerograms recorded in the 1971 San Fernando Earthquake. The method involves two separate stages. In stage I, the dam is discretized into finite elements and is subjected to horizontal static inertia-like forces; its nonlinear deformation is computed using a plane strain code, while the applied horizontal forces are gradually increased until large enough strains develop in most elements of the dam. The results of this analysis are utilized to derive realistic nonlinear stress-strain relationships for layer super-elements consisting of horizontal rows of finite elements. Then, in stage II of the analysis, the dam is discretized as a one-dimensional layered triangular shear beam, in which each layer's constitutive relation stems from the nonlinear stress-strain super-element relation determined in the previous stage. The dynamic response of the dam is then computed using (with small modifications) existing nonlinear shear beam formulations. The results of the analysis for San Fernando and Santa Felicia Dams are presented and compared with the results of two-dimensional "equivalent-linear" and "kinematic-plasticity" methods. Considerable insight is gained into the nature of the nonlinear seismic response of embankment dams.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1991 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Stara-Gazetas, Elsa and Dobry, Ricardo, "Inelastic Seismic Response of San Fernando and Santa Felicia Dams" (1991). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 16.
https://scholarsmine.mst.edu/icrageesd/02icrageesd/session07/16
Included in
Inelastic Seismic Response of San Fernando and Santa Felicia Dams
St. Louis, Missouri
A simplified method of inelastic seismic analysis of earth dams developed by the authors is used to study the response of the San Fernando and Santa Felicia dams to accelerograms recorded in the 1971 San Fernando Earthquake. The method involves two separate stages. In stage I, the dam is discretized into finite elements and is subjected to horizontal static inertia-like forces; its nonlinear deformation is computed using a plane strain code, while the applied horizontal forces are gradually increased until large enough strains develop in most elements of the dam. The results of this analysis are utilized to derive realistic nonlinear stress-strain relationships for layer super-elements consisting of horizontal rows of finite elements. Then, in stage II of the analysis, the dam is discretized as a one-dimensional layered triangular shear beam, in which each layer's constitutive relation stems from the nonlinear stress-strain super-element relation determined in the previous stage. The dynamic response of the dam is then computed using (with small modifications) existing nonlinear shear beam formulations. The results of the analysis for San Fernando and Santa Felicia Dams are presented and compared with the results of two-dimensional "equivalent-linear" and "kinematic-plasticity" methods. Considerable insight is gained into the nature of the nonlinear seismic response of embankment dams.
