Experimental study on flexural behaviour of reinforced concrete beams strengthened with passive and active CFRP strips using a novel anchorage system

Abstract The paper presents the research on reinforced concrete (RC) beams strengthened with carbon fibre polymer (CFRP) strips various configurations in terms of anchoring and tensioning. five full-scale RC total length 6.0 m were passive strips, without mechanical anchorages at their ends, as well tensioned by novel prestressing system three levels ranging from 30 to 50% CFRP tensile strength. All tested under static flexural load up failure they investigated a full range behaviour, including post-debonding phase. main parameters considered this study include use anchorages, effect tensioning influence levels. Several performance indicators have been established evaluate beams’ behaviour. revealed that using exhibited higher cracking, yielding ultimate moments compared passively bonded strips. Moreover, increasing level has significant positive beams. However, it did not affect load-bearing capacity optimal for determined 60%