Some aspects on three-dimensional numerical modelling of reinforced concrete structures using the finite element method

Gomes, Herbert Martins; Awruch, Armando Miguel

doi:10.1016/s0965-9978(00)00093-4

Cited by 38 publications

(26 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Assuming a perfect bond between steel and concrete, the strain inside iteration j of the incremental step along the steel bar with direction cosines l; m; n may easily be evaluated [36]: The contribution to the sti ness matrix of a steel bar inside a concrete element is given by (18) where E (j) r and A r are the tangential modulus of elasticity and the cross-sectional area of the steel bar. Thus, the total sti ness matrix of the reinforced concrete element is…”

Section: Proposed Numerical Strategymentioning

confidence: 99%

An efficient three-dimensional solid finite element dynamic analysis of reinforced concrete structures

Spiliopoulos

Lykidis

2005

Earthquake Engng Struct. Dyn.

View full text Add to dashboard Cite

SUMMARYMost of the ÿnite element analyses of reinforced concrete structures are restricted to two-dimensional elements. Three-dimensional solid elements have rarely been used although nearly all reinforced concrete structures are under a triaxial stress state. In this work, a three-dimensional solid element based on a smeared ÿxed crack model that has been used in the past mainly for monotonic static loading analysis is extended to cater for dynamic analysis. The only material parameter that needs to be input for this model is the uniaxial compressive strength of concrete. Steel bars are modelled as uniaxial elements and an embedded formulation allows them to have any orientation inside the concrete elements. The proposed strategy for loading or unloading renders a numerical procedure which is stable and e cient. The whole process is applied to two RC frames and compared against existing experiments in the literature. Results show that the proposed approach may adequately be used to predict the dynamic response of a structure.

show abstract

Section: Proposed Numerical Strategymentioning

confidence: 99%

An efficient three-dimensional solid finite element dynamic analysis of reinforced concrete structures

Spiliopoulos

Lykidis

2005

Earthquake Engng Struct. Dyn.

View full text Add to dashboard Cite

show abstract

“…The appropriate modelling of composite structures [1] and reinforced concrete structures [2] is a major challenge, in particular due to the material properties of concrete. Unlike steel, concrete is a material that -in compression -behaves in a non-linear way from the very beginning.…”

Section: Introductionmentioning

confidence: 99%

Selection of appropriate concrete model in numerical calculation

Śledziewski

2017

ITM Web Conf.

View full text Add to dashboard Cite

Abstract. Modelling of composite and reinforced concrete structures requires very precise determination of material parameters and constitutive relations between strain and stress. Erroneous selection of the dependencies and incorrect modelling, in particular, of the performance of concrete in tension may generate results in finite element method programs, that are far from the results obtained in an experiment. Using the example of a concrete damage plasticity model, based on fracture mechanics, this paper describes the physical interpretation and the method of the selection of parameters necessary for the appropriate modelling of concrete in a complex stress state. The correctness of the assumed description of concrete was verified on the basis of results of laboratory tests. A comparative analysis of the experimental and numerical results showed that the application of the concrete damage plasticity model allowed correct determination of the concrete element damage mechanisms for each level of strain.

show abstract

“…However, very few studies have been carried out to determine the bond stress-slip constitutive law for FRP rebars, which is essential to finite element analysis of FRP-reinforced concrete structures. Therefore, perfect bonding was assumed in most of the numerical studies of FRP-reinforced concrete structures [7][8][9][10][11][12], resulting in non-realistic and imprecise predictions of the structural behaviour. In order to obtain a more accurate structural analysis, the bond-slip behaviour of FRP rebars in concrete should be considered in the numerical model.…”

Section: Introductionmentioning

confidence: 99%