Strengthening of shear damaged RC beams with external clamping

Suntharavadivel, T. G. and Aravinthan, T. (2008) Strengthening of shear damaged RC beams with external clamping. In: 4th International Conference on Structural and Construction Engineering (ISEC 4): Innovations in Structural Engineering and Construction, 26-28 Sep 2007, Melbourne, Australia.

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Strengthening or retrofitting of existing reinforced concrete bridges has become an important issue for bridge engineers due to the rapid increase of both volume and weight of the traffic during recent years. External post-tensioning is considered as one of the most appropriate techniques for strengthening and rehabilitation of the existing reinforced concrete bridges. While the external post tensioning could be effectively used for the flexural strengthening of existing bridges, recent studies shows the efficiency of the shear strengthening using external post tensioning is significantly reduced by the existing shear cracks. The effect of the existing shear crack is a complex function depends on a number of parameters including width of the crack and crack inclination. Due to the inclination of the shear cracks, the conventional external post tension-ing may not effectively close up the cracks. Larger crack width leads to a significant reduction in the aggre-gate interlocking, which may cause a drop in the strengthening efficiency. Therefore, it is important to inves-tigate possible techniques to reduce the effect of the existing shear cracks in RC bridges. An attempt was made to investigate the efficiency of the external clamping to reduce the effect of the existing shear cracks. Six reinforced concrete beams were tested with static four-point loading with external clamping with different orientations to enhance the capacity. The experimental result shows that the orientations of the clamping significantly influence the capacity of the beams, which is discussed in this paper.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2008 Taylor & Francis Group. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 20 Feb 2008 05:14
Last Modified: 27 Feb 2015 02:47
Uncontrolled Keywords: bridges; external clamping; strengthening; rehabilitation; epoxy
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering

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