Comparative Study of Computational Modeling Techniques for the Truss-Type Shear Connector

Resumo

Shear connectors are mechanical devices used to ensure the proper transfer of shear forces at the steel–concrete interface, thus guaranteeing the satisfactory performance of composite structures. Truss-type shear connectors are an alternative to existing models on the market, such as the Stud Bolt, as they offer greater structural efficiency, lower production cost and faster execution. The mechanical behavior of this device is evaluated through push-out tests, which serve as a basis for validating numerical models that have been studied over the years. In this context, computational modeling contributes to the advancement of Structural Engineering by enabling a more practical and efficient analysis of different loadings, materials, geometries and construction techniques. However, it should be noted that the computational cost of numerical simulations can be high, especially when the analysis considers all contact interactions between modeled parts and when the materials exhibit nonlinear behavior. This research aims to compare two modeling techniques applied to the isosceles truss-type shear connector. The numerical models studied were developed using three-dimensional solid elements and wire-type elements. By analyzing parameters such as load–displacement curves and stress distributions in steel and concrete, it is possible to assess whether the computational cost associated with 3D modeling is justified, or whether a lower-cost approach provides equivalent results.