Nonlinear analysis of two-dimensional steel, reinforced concrete and composite steel-concrete structures via coupling SCM/RPHM.
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2017
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Resumo
This paper presents a numerical methodology based on Euler-Bernoulli theory to simulate the steel, reinforced
concrete and composite structures 2D nonlinear behavior. The displacement-based numerical formulation
uses the principles of the Refined Plastic Hinge Method (RPHM) to simulate the concentrated
plasticity at the corotational finite element nodal points. In order to present a more realistic simulation
of the axial and flexural stiffness degradation, the RPHM is coupled with the Strain Compatibility Method
(SCM), where the materials constitutive relations are used explicitly. The SCM is also applied in determining
the structural elements’ bearing capacity. Moreover, the present approach is not limited to a specific
cross-sectional typology. Also addressed are residual stress models; these are introduced explicitly in
subareas of steel profiles generated by a two-dimensional cross-sectional discretization. It should be
emphasized that this study considers full interaction between the materials. Finally, the results obtained
are compared with numerical and experimental findings available in the literature.
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Interaction curves, Generalized stiffness, Composite steel-concrete structures, Nonlinear analysis
Citação
LEMES, I. J. M. et al. Nonlinear analysis of two-dimensional steel, reinforced concrete and composite steel-concrete structures via coupling SCM/RPHM. Engineering Structures, v. 147, p. 12-26, 2017. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0141029616313219>. Acesso em: 29 set. 2017.