Numerical study on bending response of precast segmental concrete beams externally prestressed with FRP tendons

This study numerically investigates the bending response of dry key-jointed precast segmental concrete girders/beams (PSCBs) prestressed with external fiber reinforced polymer (FRP) tendons by using commercial finite element analysis (FEA) software Abaqus/CAE. The experimentally-validated model was used to conduct an intensive parametric a focus on second-order effect. There has not been similar numerical PSCBs FRP in published literature yet. results showed that due rectilinear rigid-body shape, behavior internal only if placing deviators next opening joints. effect beam’s and harping tendon stress at became more obvious when were located away from Both proportionate displacement. Therefore, high reinforcing index (ω) or low span-to-depth ratio (L/dp) could mitigate ultimate stage because displacement beam decreased increasing ω reducing L/dp. Commonly-used CFRP (Young’s modulus Ep = 145 GPa) found be optimum replace steel they offered strength ductility compared tendons. use high-modulus (e.g. 200 improved stiffness but greatly reduced ductility. Lastly, analytical analyses existing models yielded unconservative estimations effective depth (dpu) (fpu) PSCBs.