Structures

Mechanical behavior of UHPFRC thin plate reinforced with externally bonded CFRP sheet

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Abstract

The objective of this paper is to investigate the mechanical behavior of external CFRP sheet reinforced ultra-high performance fiber reinforced concrete (UHPFRC) thin plate. The CFRP sheet serves as the tensile component and works together with UHPFRC top layer that aims to act as the exterior surface of the thin wall-roof integrated structural curved panel. Tensile properties of CFRP material were obtained from the material supplier and through uniaxial tensile tests while the compressive tests were conducted to obtain the properties of UHPFRC. Twelve plate specimens with one or two layers of CFRP sheet and different end anchorage designs were tested under four-point flexural tests. Most reinforced specimens failed due to debonding at the interface while the reinforced plate with sufficient end anchorage failed in shear. The test results on these thin plates were used to calibrate the finite element model, especially the simplified material models. The calibrated model was then used to predict the structural behavior of single curved panel. It was found out that the thin plate made of UHPFRC and external reinforcing CFRP sheet can resist the combination of self-weight and design wind load.

Keywords: four-point flexural test, end anchorage, simplified finite element model

How to Cite:

Xia, J., Wang, X. & Li, Y., (2016) “Mechanical behavior of UHPFRC thin plate reinforced with externally bonded CFRP sheet”, International Interactive Symposium on Ultra-High Performance Concrete 1(1). doi: https://doi.org/10.21838/uhpc.2016.79