Effect of bond on flexure of concrete beams prestressed with FRP tendons
作者： Tiejiong Lou , Muyu Liu , Sergio M.R. Lopes , Adelino V. Lopes
DOI: 10.1016/J.COMPSTRUCT.2017.04.021
关键词:
摘要: Abstract The objective of this study is to reveal the effect bond between composite tendons and concrete on short-term behavior fiber reinforced polymer (FRP) prestressed beams. Based a nonlinear model that has been calibrated by experimental data, numerical tests are performed both simply supported continuous beams with bonded unbonded FRP tendons. Various levels prestressing reinforcement ratio ( ρ p ) used. analysis shows condition remarkable influence flexural response beams, including failure mode, crack pattern, deformation, increase in tendon stress neutral axis movement. Moment redistribution obviously higher than ones at low level, but discrepancy appears be insignificant high level. ACI 318-11 can satisfactorily reflect moment CSA A23.3-04 cannot.
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