Shear-flexural interaction for prestressed self-consolidating concrete beams

摘要

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.