Shear–flexural interaction for prestressed self-consolidating concrete beams: Fid-Bau Portal

Shear–flexural interaction for prestressed self-consolidating concrete beams

Massone, Leonardo M. / Gotschlich, Nicolás J. / Kang, Thomas H.-K. / Hong, Sung-Gul

Highlights • Prestressed self-consolidating concrete beams were tested to fail in shear–flexure. • The effect of varied shear span-to-depth ratios on the behavior was assessed. • The beam transverse expansion profile was monitored & used for model validation. • The shear–flexural behavior of the beam was captured using the developed approach. • The shear–flexure model reproduced the degradation of the beams reasonably well.

Abstract This work validated a model of shear–flexure interaction for prestressed self-consolidating concrete beams with varied shear span-to-depth ratios, which were tested under four-point bending as part of this work. The interaction between flexure and shear was introduced by a panel element’s biaxial behavior in a modified fiber element formulation. Two different assumptions were considered for the interaction model implementation: (i) zero transverse normal stress perpendicular to the beam axis in any cross section, and (ii) a prescribed transverse normal strain profile along the beam based on the model calibrated for cantilever members. The interaction model with a prescribed transverse strain profile and with a consideration of flexure-induced deformations had better predictions of capacity and deformation for the tested beams, as well as the transverse normal strain profile, compared to the other models.