Experimental Study on Earthquake-Damaged RC Frame Columns Repaired with Sprayed Basalt FRP

Abstract:

Repairing of past earthquake-damaged members that are highly susceptible to future attack is necessary to prevent civil infrastructure destruction and consequent lives lose.Sprayed basalt FRP composite was tested and presented here as a promising solution.In this study, three 1/2 scaled reinforced concrete frame columns were used to investigate the effectiveness and feasibility.One column was damaged to failure and used as a reference specimen.The other two columns were damaged up to the yielding of main bars simulating deterioration of the structure due to seismic action to a control level.These two columns were repaired with sprayed basalt fiber reinforced polymer (BFPR) composite.Different thicknesses of sprayed BFRP composite were applied.Each specimen was subjected to lateral low-frequency cyclic loading and simultaneous constant axial load to simulate seismic action and dead load respectively.The test result analysis showed that sprayed BFRP can increase the load carrying capacity, enhance the energy absorption capacity, and can effectively restore the strength of past earthquakedamaged RC column.

• Periodical: Advanced Materials Research (Volumes 889-890)
• Pages: 1438-1444
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.889-890.1438
• Online since: February 2014
• Authors: M. Bitewlgn Getahune*, Qian Gu, Bo Li, Cheng Fang Sun
• Keywords: Basalt FRP, Earthquake-Damaged, RC Frame Column, Repairing, Sprayed FRP

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