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This paper investigates the creep of fiber-wrapped high-strength concrete (HSC) columns (FWHSCCs) under low level axial stress by testing and modeling. Firstly, an experimental work on the creep of four FWHSCCs is presented. Secondly, by introducing modified coefficients about compressive strength, water-cement ratio and silica fume content of concrete, a modified model suitable for predicting the creep of HSC, based on Bažant's B3 model for normal concrete creep prediction, is proposed. Thirdly, considering the state of triaxial stresses of the concrete core, the autogenous shrinkage of HSC, and the interaction stress history, an analytical model based on the proposed model for HSC creep and the power law for fiber reinforced polymer (FRP) creep is developed for predicting the creep of FWHSCC. The prediction results agree well with the test data. This investigation also shows the creep of FWHSCCs is lower than that of FRP wrapped normal strength concrete column.
Advances in Structural Engineering – SAGE
Published: Feb 1, 2012
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