AVALIAÇÃO DA RESISTÊNCIA AO ARRANCAMENTO DE PINOS ARTESANAIS EMBUTIDOS EM CRFA
Abstract
The fracture mechanics concept for predicting the concrete strength capacity under axial stud pull-out force only takes into account the influence of the conical area projection and the concrete tensile strength; therefore, the accuracy of the model only depends on the fit coefficient (k) of the model, obtained experimentally. This work presented experimental results of the strength capacity of isolated studs embedded in steel fiber concrete blocks to evaluate the accuracy of literature empirical models. The study parameters were the stud heads' thickness and the steel fiber's volumetric rates. The experimental results showed strength gains of around 50% and 60%, respectively, for 0.5% and 1.0% of fiber addition, for a concrete compressive strength of 25 MPa and a head thickness th > 5.0 mm. The comparison with the theoretical models proved to be very conservative, with a k value of less than 17, and more accurate with the effect of head stud thickness consideration.
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References
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