Nonlinear analysis of two-dimensional steel, reinforced concrete and composite steel-concrete structures via coupling SCM/RPHM

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 concentra...

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Bibliographic Details
Published inEngineering structures Vol. 147; pp. 12 - 26
Main Authors Lemes, Ígor J.M., Silveira, Ricardo A.M., Silva, Andréa R.D., Rocha, Paulo A.S.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 15.09.2017
Elsevier BV
Subjects
Bearing capacity
Composite materials
Composite steel-concrete structures
Composite structures
Computer simulation
Concrete structures
Constitutive relationships
Cross-sections
Finite element method
Generalized stiffness
Interaction curves
Mathematical models
Nonlinear analysis
Plasticity
Refined Plastic Hinge Method (RPHM)
Reinforced concrete
Reinforcing steels
Residual stress
Simulation
Steel
Steel structures
Stiffness
Strain Compatibility Method (SCM)
Structural members
Two dimensional analysis
Typology
Refined Plastic Hinge Method (RPHM)
Strain Compatibility Method (SCM)
Composite steel-concrete structures
Generalized stiffness
Interaction curves
Nonlinear analysis
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Summary: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.
ISSN:0141-0296
1873-7323
DOI:10.1016/j.engstruct.2017.05.042