Seismic retrofitting of reinforced concrete bridge frames using external bonded FRP sheets

Pandey, G.R., Mutsuyoshi, H., and Tuladhar, R. (2008) Seismic retrofitting of reinforced concrete bridge frames using external bonded FRP sheets. In: Proceedings of the 14th World Conference on Earthquake Engineering (11), pp. 1-8. From: 14WCEE 14th World Conference on Earthquake Engineering, 12-17 October 2008, Beijing, China.

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Abstract

Following the strong earthquakes like Hyogoken Nanbu earthquake in 1995 and Niigataken Tyuetsu Earthquake in 2004, many RC viaducts in Japan were strengthened in the columns. The ductility of such structures, however, may still be limited due to the potential shear failure at the beams. In this research, experimental investigations were conducted in order to study the possible enhancement of seismic behavior of beams by externally bonded fiber reinforced polymer (FRP) sheets. In shear strengthening beams using FRP sheets, full wrapping is not always possible and in U-wrapping, debonding failure of FRP sheet limits the proper utilization of its strength. Therefore, in this research FRP sheets were mechanically anchored to the beams. A total number of six specimens with different wrap configurations and mechanical anchorage schemes were tested. Experimental results showed that a proper selection of mechanical anchorage scheme for FRP sheet in U-wrap portion is necessary for the significant enhancement of shear strength of RC beam close to that of a fully wrapped beam.

Item ID: 16823
Item Type: Conference Item (Non-Refereed Research Paper)
Keywords: FRP, RC beams, shear strengthening, debonding, mechanical anchorage
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Date Deposited: 01 Sep 2011 06:45
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 50%
09 ENGINEERING > 0912 Materials Engineering > 091202 Composite and Hybrid Materials @ 50%
SEO Codes: 87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870302 Metals (e.g. Composites, Coatings, Bonding) @ 50%
87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials @ 50%
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