Análise numérica da capacidade resistente de conectores de cisalhamento treliçado reto utilizando o método dos elementos finitos

Abstract

Composite structures have been consolidated since the beginning of their use around the world. In Brazil, this type of structure is standardized by ABNT NBR 8800:2008, which provides for the use of only two types of connectors, the Stud Bolt and the “U” type laminated profile. It was thinking about offering a more viable alternative for the national context the Barbosa (2016) presented in his work the conception of a new connector model, the truss-type shear connector (TTC). However, in order for this connector to be definitively incorporated as an alternative, more studies need to be carried out to determine its behavior when subjected to the most diverse situations. That said, a numerical study was developed in this work with the objective of analyzing the behavior of the straight truss shear connector used in steel-concrete composite beams. To this end, the ABAQUS software was used to develop a three-dimensional and non-linear numerical model of a push-out test. After the validation of the methodology and the numerical model, a parametric study was carried out to analyze the influence of the variation of the diameter of the connector and the strength of the concrete on the gain of the resistant capacity of the connection. The results showed that both parameters positively affect the strength gain of the connection, but the diameter had a greater influence on the gain of the resistant capacity of the connection than the strength of the concrete.