Expansive concrete confined by CFRP under eccentric compression

CFRP confined expansive concrete (CCEC) has shown higher inflection load, intercept load and ultimate load than CFRP confined unexpansive concrete (CCUC) counterparts under axial compression. The aim of this study is to investigate the compression behavior of CFRP confined expansive concrete subjected to eccentric load. Eighteen concrete element specimens have been prepared in this experiment considering the parameters including prestress level, CFRP layer and eccentricity of load. Prestress in concrete and CFRP at 28-day were calculated through the recorded hoop strain on CFRP. It can be observed from the experimental results that the ultimate load increases with the increase of the number of CFRP layers and decreases with the increase of the eccentricity. Experimental and discussion results indicate that CFRP confined expansive concrete show higher intercept loads (average 19.6%), inflection loads (average 20.4%), ultimate loads (average 13.7%) than the corresponding CFRP confined unexpansive concrete under the same testing scenarios. But due to the effect of prestress, relative to unexpansive specimens, the prestressed specimens have smaller hoop strains, lateral deflections and curvatures. (C) 2019 Elsevier Ltd. All rights reserved.