Design Considerations of GFRP-Reinforced CRCP


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Title: Design Considerations of GFRP-Reinforced CRCP

Author(s): J.-H. Choi and H.-L. Chen

Publication: Special Publication

Volume: 215


Appears on pages(s): 139-160

Keywords: bond-slip; concrete; continuously reinforced concrete pavement (CRCP); glass fiber reinforced polymer (GFRP); pavement; reinforcement; shrinkage; subbase; temperature variation

Date: 8/1/2003

Substitution of conventional steel reinforcing rebars with Glass Fiber Reinforced Polymer (GFRP) rebars in Continuously Reinforced Concrete Pavement (CRCP) gives solutions to the problems caused by corrosion of reinforcement. Concrete volume change, due to shrinkage and temperature variations is known to cause crack development in CRCP. In this study, the stress levels in concrete and GFRP rebars and the crack widths at various crack spacings are predicted using numerical methods. The results reveal that using GFRP rebars as reinforcement in CRCP reduces the tensile stress in concrete. The bond-slip between concrete and reinforcement and the friction from the pavement's subbase have important effects on the development of the reinforcement's stresses and the crack widths. The design of a GFRP-reinforced CRCP to be constructed during this year is proposed. The behavior of the CRCP due to concrete shrinkage and temperature variation is predicted. The stress levels in the GFRP reinforcement, the crack width and the crack spacing of the proposed pavement are shown to be within the design requirements.