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Experimental Responses of Jacketed RC Beams

Panuwat Joyklad 1 and Suniti Suparp 2
1. Department of Civil Engineering, Srinakharinwirot University, Thailand
2. Kasem Bundit University, Thailand

Abstract—Repair and strengthening of reinforced concrete (RC) beams is commonly carried out by “jacketing”. Jacketing is the addition of concrete or cement mortar and steel reinforcement to an existing beam. This paper describes an experimental investigation into the behavior of reinforced concrete beams strengthened by jacketing. Static load tests to failure were carried out on five reinforced concrete shallow beams. The mortar used in the jacket was non-shrink cement grout. The steel bars were fixed to the beams by using two inexpensive and simple anchorage systems i.e., epoxy anchorage system and mechanical expansion anchors with steel plate anchorage system. Based on experimental results, it was noted that jacketing using mortar and steel bars is very effective method to enhance ultimate load carrying capacity of RC beams compared with control beams. Proposed anchorage systems were proved effective to securely attach the steel bars to the beam. The anchorage system with mechanical anchors is resulted into higher load carrying capacity of RC beams compared with epoxy anchorage system. The control beam failed at the peak ultimate load of 23.70 kN. The RC beams jacketed using epoxy anchorage were failed at 13% to 27% higher peak load compared with control beam, whereas RC beams jacketed using mechanical anchors were failed at 84% to 105% increased load compared with control beam.

Index Terms—flexural strengthening, anchorage system, jacketing, epoxy, mechanical anchors

Cite: Panuwat Joyklad and Suniti Suparp, "Experimental Responses of Jacketed RC Beams," International Journal of Structural and Civil Engineering Research, Vol. 6, No. 4, pp. 245-251, November 2017. doi: 10.18178/ijscer.6.4.245-251