Analytical Modelling of Fiber Reinforced Composite Coupling Beams

The coupling member, coupling beams are characterized by large deformations and shear-dominated responses. To accurately evaluate the magnitude of the seismic response of the buildings with the coupled shear walls, the model must be the one that includes the parameters that are expected to influence these responses. In this study, using the constructed database of prior studies, the formulation is proposed to determine the nominal shear strength of the Fiber Reinforced Composite coupling beams. Three samples of the diagonally reinforced concrete coupling beam specimens: one sample with fiber reinforcement composites and two samples without fiber reinforcement composites are analytically modelled. The time history nonlinear direct integration modelling method by using SAP2000 is used to evaluate the energy dissipation capacities of the coupling beams. To accurately evaluate the performance of diagonally reinforced coupling beams under reversal cyclic loadings, the strength and the chord rotation capacity of each specimen as a function of the parameters that are used in each sample is used in this study. Results show that the chord rotation capacity that is exhibited by the specimens with FRC is much less than that exhibited by the concrete without fiber reinforcement. And at the end, the diagonal bars also perform less at a higher aspect ratio, and hence this significantly decreases the shear carrying capacity of the coupling beam. © 2023 American Institute of Physics Inc.. All rights reserved.