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Title |
Finite Element Mesh Dependency in Nonlinear Earthquake Analysis of Concrete Dams
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Keywords |
콘크리트 댐; 비선형 유한요소해석; 지진해석; 손상모형; 유한요소망 의존성; 정규화; concrete dam; finite element analysis; earthquake analysis; damage model mesh dependency; regularization |
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Abstract |
A regularization method based on the Duvaut-Lions viscoplastic scheme for plastic-damage and continuum damage models, which provides mesh-independent and well-posed solutions in nonlinear earthquake analysis of concrete dams, is presented. A plastic-damage model regularized using the proposed rate-dependent viscosity method and its original rate-independent version are used for the earthquake damage analysis of a concrete dam to analyze the effect of the regualarization and mesh. The computational analysis shows that the regularized plastic-damage model gives well-posed solutions regardless mesh size and arrangement, while the rate-independent counterpart produces mesh-dependent ill-posed results.
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