Flexural Behavior of Thermoplastic Beams With and Without FRP Reinforcement
Date of Award
Master of Science (MS)
Civil & Environmental Engineering
Call Number for Print
Special Collections LD4331.E54 C67
This thesis presents the results of an experimental and theoretical study of the flexural behavior of thermoplastic beams with and without fiber-reinforced plastic (FRP) rebars. Tests are conducted on commercially available thermoplastic beams known as Seatimber. The normal stress-strain relations of both the thermoplastic material and FRP rebars are obtained in tension and compression experimentally. These mechanical property curves are then used as part of the input for developing the theoretical moment-curvature relations using an iterative equilibrium procedure. The moment-curvature relations are in turn used for predicting the beam load-deflection curves via the central finite-difference procedure. Behavior predictions are made for a square section thermoplastic beam with and without FRP rebars and with simple supports. Full-scale experiments on these beams are conducted by a gradually increasing midspan static load until the beam load-carrying capacity is reached. Reasonable agreement between the theory and experiment is found for the thermoplastic beam without FRP rebars. For the thermoplastic beam with FRP rebars, the theory is in good agreement up to the maximum experimental load value. However, since an ideal bond between the thermoplastic material and the FRP rebars is assumed in the theory, it gives a higher beam load-capacity compared to that observed in the laboratory. It is also found that the presence of the FRP rebars results in a substantial reduction in beam deflections. The research reveals that both FRP-reinforced and unreinforced thermoplastic beams possess a high potential for civil and other engineering applications.
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"Flexural Behavior of Thermoplastic Beams With and Without FRP Reinforcement"
(1997). Master of Science (MS), Thesis, Civil & Environmental Engineering, Old Dominion University, DOI: 10.25777/fnyq-n732