An experimental investigation on the ultimate strength of epoxy-repaired braced partial infilled RC frames
Tóm tắt
Due to earthquake, buildings are damaged partially or completely. Particularly, structures with soft storey are mostly affected. In general, such damaged structures are repaired and reused. In this regard, an experimental investigation was planned and conducted on models of single bay, single storey of partial concrete infilled reinforced concrete (RC) frames up to collapse with corner, central, and diagonal steel bracings. Such collapsed frames were repaired with epoxy resin and retested. The initiative was to identify the behavior, extent of restored ultimate strength, and deflection of epoxy-retrofitted frames in comparison with the braced RC frames. The performance of such frames has been considered only for lateral loads. In comparison with bare RC frames, epoxy-repaired partial infilled frames have significant increase in lateral load capacity. Central bracing is more effective than corner and diagonal bracing. For the same load, epoxy-repaired frames have comparable deflection than similar braced frames.
Tài liệu tham khảo
Benjamin JR, Williams HA: The behavior of one storey brick shear wall without frame, with concrete frame, with steel frames. Proc ASCE 1958, ST-4: 1723–1730.
Benjamin JR, Williams HA: Behavior of reinforced concrete shear wall. Transac Am Soc Civil Eng 1959, 124: 669–708.
Bhikshma V, Koti Reddy M, Sunithaa K: Experimental study on rehabilitation of RC beams using epoxy resins. Asian J Civil Eng (Building Housing) 2010, 11: 533–542.
French CW, Thorp GA, Tsai WJ: Epoxy repair techniques for moderate earthquake damage. ACI Struct J 1990, 87: 416–424.
Hashmi AK, Alok M: Damage forecast for masonry infilled reinforced concrete framed buildings subjected to earthquakes in India. Curr Sci 2008,94(1):61–63.
Kanakambara Rao S: Photo-elastic method of stress analysis for panel of infill frame subjected to racking. Int J Modern Eng Res 2011, 1: 236–241.
Karayannis CG, Chalioris CE, Sideris KK: Effectiveness of RC beam-column connection repair using epoxy resin injections. J Earthq Eng 1998, 2: 217–240.
Mahmoud Maheri R: Recent advances in seismic retrofit of RC frames. Asian J Civil Eng (Building Housing) 2005, 6: 373–391.
Popov E, Bertero VV: Repaired R/C members under cyclic loading. Earthq Eng Struct Dyn 1975, 4: 129–144. 10.1002/eqe.4290040204