Numerical approach of the steel-concrete bond behavior using pull-out models

• Autor(a) principal: Almeida Filho,Fernando Menezes de
• Data de Publicação: 2019
• Outros Autores: Nardin,Silvana De, Debs,Ana Lúcia Homce de Cresce El
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Matéria (Rio de Janeiro. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000200301
• topic: bond strength; pull-out tests; numerical approach; contact surface; finite element method

ABSTRACT This paper deals with the analysis of monotonic loading behavior in pull-out tests. The main objective is to obtain a reliable numerical model to represent the steel-concrete bond behavior using previously obtained experimental results. The tests were performed in RILEM pull-out specimen using 10 mm steel bar and concrete with compressive strength of 30 MPa. The numerical study used Ansys® software, based on FEM (Finite Elements Method). The numerical simulation adopted non-linear constitutive relationships to represent the behavior of both concrete and steel. A contact surface composed of special finite elements modeled the interface between the concrete and the steel bar, allowing a steel–concrete slip. The numerical analysis performed with variation of the main parameters of the software permitted determining the best ones, and choosing them to obtain a good representation of the bond phenomena. The numerical results had a good agreement with the experimental results. Both linear and non-linear approaches represented the pre-peak behavior, however only the non-linear model gave the best approach for the pull-out force. In addition, the numerical results had shown the simplified model can be used to represent the steel-concrete bond behavior reducing the processing time for current structures analysis.