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dc.contributor.authorRodrigues, M.pt_BR
dc.contributor.authorOliveira, S.pt_BR
dc.description.abstractThe main objective of this work is the development and presentation of a three-dimensional finite element program, DamSlide3D, to study the behavior of gravity dams for scenarios of sliding through the dam-foundation interface. The DamSlide3D, developed using MATLAB, includes cube-type finite elements with 20 nodal points ("serendipity") and finite interface elements with 16 nodal points (joint elements). Initially, we present the fundamental equations of Solid Mechanics, referring to the main simplified hypotheses considered in the computationally implemented formulation, which is presented mathematically as a problem of boundary values using a displacement formulation. For the structure body and for the foundation, the hypothesis of isotropic materials with linear elastic behavior is assumed and for the interfaces the hypothesis of non-linear behavior is considered using the Mohr- Coulomb criterion. The DamSlide3D input data is provided in an excel file and includes structure geometry data, material properties, support conditions and load parameters. As output, the program graphically displays the stress field (principal stresses) and the displacement field (deformed structure). The program was verified throughout three numerical tests with known theoretical solutions. In these tests a simple structure was used, composed by a column discretized in 3DFE. At the contact surface between the column and the base (horizontal surface) it was considered an interface discretized using joint finite elements. A plane surface that crosses the column with a given slope is also considered, discretized using the same type of joint finite elements. In the first test, the field of elastic stresses at the base, due to self-weight (SW) and hydrostatic pressure (HP), was compared with the theoretical results. In the second test the nonlinear column response was studied for different values of the friction angle at the inclined interface (in this test the structure is only submitted to SW). In the third test, for the main SW + HP loads, the stability of the column is studied for a variation of the friction angle, and for a variation of the water level. In these three numerical tests the results were always consistent with the theoretical solutions. Finally, as an example of application, a gravity dam structural behavior was analyzed considering the non-linear behavior in the dam-foundation interface. The dam was subjected to self-weight and hydrostatic pressure. A parametric study was developed in order to study the dam stability for different values of water level and friction angle.pt_BR
dc.relation.ispartofseriesREPORT 150/2019 – DBB/NMMR;pt_BR
dc.subjectGravity dampt_BR
dc.subject3D solid finite elementspt_BR
dc.subjectJoint finite elementspt_BR
dc.subjectInterface non-linear behaviorpt_BR
dc.subjectMohr-Coulomb failure criterionpt_BR
dc.subjectDam-foundation interface friction anglept_BR
dc.titleStructural analysis of gravity dams considering non-linear behavior in the dam-foundation interface - Development of a 3DFE code using MATLAB: DamSlide3Dpt_BR
dc.title.alternativeAnálise estrutural de barragens gravidade considerando comportamento não linear na interface barragem-fundação - Desenvolvimento de um programa de EF3D, em MATLAB: DamSlide3Dpt_BR
dc.description.commentsWork carried out under the project P2I/LNEC “Cutting-edge solutions for sustainable assessment of concrete dam foundations” / NÃO CONFIDENCIALpt_BR
Appears in Collections:DBB/NMMR - Relatórios Científicos

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