The influence of modeling techniques on the numerical analysis of composite beams

Resumo

This work aims to quantify the effects of implementation choices, such as type and number of
finite elements, on the modeling composite beams. The study is carried-out on a full-size finite element
model of the structure, which provides a more comprehensive description of the mechanical behavior
of the system when compared to the traditional push-out test. We focus on the influence of contact
conditions, physical and mechanical properties, discretization aspects and boundary conditions on the

correct representation of the force-displacement, local stresses and strains in the section-stud and concrete-
stud interfaces. Based on the observations, the importance of nonlinear relationships is discussed and a

criteria for an adequate numerical implementation of models is proposed.