The influence of high-strength steel on the failure modes of steel-concrete composite cellular beams

Resumo

The use of steel-concrete composite cellular beams expands the options in civil construction projects, as it results in greater strength capacity when compared to components acting separately, as well as greater steel savings when compared to full-span beams. In this respect, it is interesting to study the influence of high-strength steel on the failure modes and strength capacity of composite cellular beams. Therefore, this study aims to contribute to the study of composite cellular beams under positive moment, with the replacement of ordinary steel by high-strength steel, identifying the influence of this parameter on their failure modes and on the strength capacity of the composite cellular beam. In this way, using ABAQUS software, a numerical model was developed and validated using experimental results from the literature, to obtain the original behavior and then parametric analysis focused on replacing ordinary steel with high-strength steel. The study resulted in four numerically validated cellular composite beam models and three variations of each, modifying the yield strength of the steel and realizing that, as expected, the strength capacity of the beam increased considerably.