Experimental Study on Flexural Performance of Corroded RC Beams Strengthened with AFRP Sheets

Abstract

In order to investigate the strengthening effects of aramid fiber reinforced polymer (AFRP) sheets on the flexural performance of the corroded beams, the flexural behaviors of corroded RC beams strengthened with AFRP sheets under different degrees of corrosion (minor: reinforcement mass loss is 2.0％, medium: reinforcement mass loss is 6.0％) are researched experimentally in this paper, and compared with that of the control beams (un-corroded) and un-strengthened corroded beams. The results show that，compared with un-strengthened corroded beams under same degrees of corrosion, the cracking load, yield load and ultimate load of minor corroded RC beam strengthened with AFRP sheets is respectively increased by 20%, 27% and 60%, and increased by 15%, 36% and 83% for medium corroded RC beam strengthened with AFRP sheets respectively; The ultimate deflection of the medium corroded beam strengthened with AFRP sheets is 166% larger than that of corroded un-strengthened beam. AFRP sheets can improve significantly the bearing capacity and deformation for corroded RC beams.

Flexural Behavior of Corroded Concrete Beams Strengthened with Carbon Fiber-Reinforced Polymer

“…Kashi et al [ 24 ] investigated the effect of marine environmental conditions on the durability of RC corroded columns strengthened with FRP sheets. Some researchers also investigated the structure performance of AFRP-strengthened corroded RC beams [ 25 , 26 ]. Gotame.…”

Study on Flexural Behavior of Corroded I-Shaped Steel Beams Strengthened with Hybrid CFRP/GFRP Sheets

“…Zongcai Deng et al [ 15 ] demonstrated that using carbon/aramid/glass interlayer hybrid fiber cloth reinforcement can effectively improve the bending performance of corroded beams. Wei et al [ 16 ] studied the performance of CFRP cloth, GFRP cloth, and other fiber layer hybrid bonding to reinforce reinforced concrete beams. Research has found that the higher the ultimate tensile strength and distribution of fiber materials, the more significant the improvement in the ultimate bearing capacity of the test beam.…”

Αποκατάσταση Και Ενίσχυση Διαβρωμένων Στοιχείων Από Ωπλισμένο Σκυρόδεμα Με Σύνθετα Υλικά

“…Εναλλακτικά, οι Deng et al (2009) χρησιμοποίησαν σύνθετα υλικά ινών αραμιδίου (AFRP) για την ενίσχυση διαβρωμένων δοκών σε διαφορετικά επίπεδα απώλειας μάζας του οπλισμού και κατέληξαν ότι τα υφάσματα ινών αραμιδίου μπορούν να βελτιώσουν σημαντικά την καμπτική αντοχή και τις βυθίσεις δοκών ακόμα και με υψηλό βαθμό διάβρωσης σε σύγκριση με μικρότερους βαθμούς διάβρωσης. Οι El Maaddawy et al ( 2013) μελέτησαν την επιρροή της έκθεσης σε συνθήκες διάβρωσης δοκών ενισχυμένων καμπτικά με ελάσματα FRP και μεταλλικούς σφιγκτήρες (Powder Actuated Fastened PAF).…”