Abstract
abstract: The use of steel-concrete composite beams allows the best properties of these materials to be explored, resulting in more economical solutions. Many researchers have studied the behavior of composite beams from different strategies of numerical modeling, and some of these are presented in this article. In this context, the present work proposes the construction of a tridimensional numerical model using ANSYS software, version 19.2, with current-technology elements and compatible material models. For the simulation of concrete behavior, two models have been used: the first, denominated DP-CONCRETE, is a native ANSYS model, available in the more recent versions of this software; and the second, denominated USERMAT, is a customizable model that was developed based on Ottosen criterion. The results obtained with these models for the analyzed beams presented a good correlation with the experimental results and with numerical results from previous works.
Highlights
The use of steel-concrete composite beams has been widespread in the civil construction sector, as it allows the best mechanical properties of the involved materials to be explored
The present work proposes the construction of a three-dimensional finite element model for the numerical simulation of composite beams, with ANSYS software, version 19.2, using elements classified as current technology by the software documentation [18]
It can be observed that the employed strategy, in terms of geometry and element types, approaches the strategy used by [8]: the main differences are in the adopted material models for the concrete and in the choice of more current elements
Summary
Numerical instability problems associated with this model were described by several researchers, who reported the need to disable the crushing option to improve convergence [1], [8] In this context, the present work proposes the construction of a three-dimensional finite element model for the numerical simulation of composite beams, with ANSYS software, version 19.2, using elements classified as current technology by the software documentation [18]. The present work proposes the construction of a three-dimensional finite element model for the numerical simulation of composite beams, with ANSYS software, version 19.2, using elements classified as current technology by the software documentation [18] In this model, the applicability of two different approaches for the simulation of concrete behavior will be evaluated: (i) a customized model by the subroutine USERMAT, based on the Ottosen criterion [19]; and (ii) the DP-CONCRETE model, available in the most recent versions of ANSYS. The validation of the developed model will be carried out from the numerical simulation of two composite beams tested experimentally by Chapman and Balakrishnan [9], which were numerically simulated by previous works [1], [8], [12], [14], [15]
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