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Seismic Response Sensitivity Analysis of Coupled Dam-Reservoir-Foundation Systems
Response sensitivity analysis (RSA) is an important component in various gradient-based methods, e.g., structural optimization, reliability analysis, system identification, and finite element (FE) model updating. The direct differentiation method (DDM) is efficient and accurate, providing an ideal solution to RSA. This paper extends the DDM significantly for performing RSA of realistic coupled concrete dam-reservoir-foundation systems, in which the material nonlinearity, the solid fluid interaction, the dam-foundation interaction, and the truncation boundary conditions of the water and rock foundations are considered. The response sensitivities for various elements and materials used to simulate the complicated coupled system are derived and implemented into an existing DDM framework in a general-purpose nonlinear finite element analysis program, OpenSees. A realistic dam-reservoir-foundation system subject to dynamic loading conditions is taken as application example. The newly developed response calculation algorithms are verified by commercial FE software, ABAQUS, and the DDM algorithms are validated by finite difference method (FDM). In addition, as application of the DDM, the calculated response sensitivities are used to compare the relative importance of various material parameters regarding the dynamic responses of the systems. It is demonstrated that the DDM is accurate and efficient, providing an excellent solution to the RSA of complicated nonlinear concrete dam-reservoir-foundation systems.
Seismic Response Sensitivity Analysis of Coupled Dam-Reservoir-Foundation Systems
Response sensitivity analysis (RSA) is an important component in various gradient-based methods, e.g., structural optimization, reliability analysis, system identification, and finite element (FE) model updating. The direct differentiation method (DDM) is efficient and accurate, providing an ideal solution to RSA. This paper extends the DDM significantly for performing RSA of realistic coupled concrete dam-reservoir-foundation systems, in which the material nonlinearity, the solid fluid interaction, the dam-foundation interaction, and the truncation boundary conditions of the water and rock foundations are considered. The response sensitivities for various elements and materials used to simulate the complicated coupled system are derived and implemented into an existing DDM framework in a general-purpose nonlinear finite element analysis program, OpenSees. A realistic dam-reservoir-foundation system subject to dynamic loading conditions is taken as application example. The newly developed response calculation algorithms are verified by commercial FE software, ABAQUS, and the DDM algorithms are validated by finite difference method (FDM). In addition, as application of the DDM, the calculated response sensitivities are used to compare the relative importance of various material parameters regarding the dynamic responses of the systems. It is demonstrated that the DDM is accurate and efficient, providing an excellent solution to the RSA of complicated nonlinear concrete dam-reservoir-foundation systems.
Seismic Response Sensitivity Analysis of Coupled Dam-Reservoir-Foundation Systems
Gao, Yichao (author) / Gu, Quan (author) / Qiu, Zhijian (author) / Wang, Jinting (author)
2016-06-08
Article (Journal)
Electronic Resource
Unknown
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