Title:
Flexural Behavior of Reinforced Concrete Beams Retrofitted or Repaired with Slurry Infiltrated Mat Concrete
Author(s):
Ajiboye F. Oluokun and Abdol R. Haghayeghi
Publication:
Structural Journal
Volume:
95
Issue:
6
Appears on pages(s):
654-664
Keywords:
ductility; energy absorption; repaired and retrofitted beams; toughness
DOI:
10.14359/579
Date:
11/1/1998
Abstract:
The flexural behavior of 28 beams was experimentally investigated, with an emphasis placed on the determination of the effects of the slurry infiltrated mat concrete (SIMCON) addition on the flexural response of SIMCON retrofitted and SIMCON repaired concrete beams. The complete flexural behavior of SIMCON retrofitted and repaired beams has been investigated and documented. All beams were subjected to third point flexural loading tests. The experimental results obtained for the SIMCON repaired and retrofitted beams were compared to the results of the reference beams. The general behavior and the benefits of the addition of SIMCON on parameters such as moment curvature, load deflection, ductility, toughness, and energy absorption were experimentally determined. Tremendous increases in all of the measured flexural parameters were observed in SIMCON repaired and retrofitted beams compared to the reference beams. Cracking moment capacity increases of between 56 percent for beams with relatively large sections, and 200 percent for beams with relatively small sections, were reported while the yield moment capacity increases varied between 27 and 62 percent for large and small beam sections, respectively. At ultimate, moment capacity increases of between 20 and 69 percent were measured in the repaired and retrofitted beams compared to the corresponding values for the reference beams. At cracking, yielding, and ultimate, average energy absorption capacity increases of about 185, 45, and 52 percent, respectively, were measured in the SIMCON repaired and retrofitted beams. Similar increases in ductility were reported for the repaired and retrofitted beams.