Due to the premature debonding of fiber-reinforced polymer (FRP) materials which results in a reduction in 14 ductility, the problem of how to exploit moment redistribution (MR) in FRP-strengthened continuous 15 reinforced concrete (RC) structures is still unresolved. To date, limited research has been conducted into MR 16 in such structures, so that a reliable and rigorous solution for quantifying MR throughout the loading cycle 17 remains elusive. This paper aims to quantify MR and predict the capacity at reasonable accuracy, to encourage 18 the use of FRP for the strengthening of existing continuous RC structures. Experiments conducted on twelve 19 continuous T-beams are reported, and the findings are discussed. Strengthening configuration and anchorage 20 scheme are the main variables. A new analytical strategy is described for quantifying MR, and the analytical 21 results are then validated against the experimental results. Both experimental and analytical results confirm 22 that there is no reason to restrict MR into strengthened zones. More importantly, MR out of FRP-strengthened 23 zones can indeed occur, provided that the FRP is sufficiently anchored, and reliable exploitation of this is now 24 possible.
|Number of pages||13|
|Journal||ASCE Journal of Composites for Construction|
|Early online date||30 Jun 2016|
|Publication status||Published - 28 Feb 2017|
Tajaddini, A., Ibell, T., Darby, A., Evernden, M., & Silva, P. (2017). Prediction of capacity for moment redistribution in FRP-strengthened continuous RC T-beams. ASCE Journal of Composites for Construction, 21(1), 1-13. . https://doi.org/10.1061/(ASCE)CC.1943-5614.0000719