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Torsional Behavior of RC beams Strengthened by Near Surface Mounted-Steel Wire Rope Under Repeated Loading |
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PP: 1085-1097 |
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doi:10.18576/isl/120301
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Author(s) |
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Israa Kh. Jasim,
Mazin B. Abdulrahman,
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Abstract |
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| In this paper, the torsional behavior of strengthened beams, which were subjected to constant and incremental repeated loads is studied. Repeated loads have a negative effect on the strength of beams as they reduce the beams resistance to external loads. External strengthening is usually used to increase the strength of beams for different applied loading. The near-surface mounted technique is a type of strengthening recently used to improve the strength of beams. The experimental program includes testing of twelve beams. All beams have the same dimensions and the same reinforcement. Nine of those beams are strengthened with different configurations of steel wire rope, and three beams are non-strengthened (reference beams). The results show that the decreasing of the spacing between wires (increasing the amount of steel wires) leads to an increase in the beam torsion strength and a decrease in the twist angle of beams. All strengthened beams show high resistance to the repeated load, especially constant repeated load, the increased torsional capacity has reached to 181.12% in beams under constant repeated load compared to the related beam subjected to monotonic load.
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