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Stress Redistribution along the Interface between Concrete and FRP Subject to Long-Term Loading
Results of an experimental campaign concerning the long-term behavior of FRP plates bonded to concrete are presented. Four CFRP plates with three different bonded lengths (from 100 mm to 400 mm) have been subject to long-term loads by using a mechanical system designed to apply a traction force constant with time. The tests have been carried out in a climatic room with a constant temperature T=20°C and humidity RH=60%, for about three years. The strain profile evolution with time along the bonded length has been recorded by using a number of strain gauges along the plates. An appreciable stress redistribution with time along the plate has been observed. A simplified viscoelastic analytical model has been finally used to reproduce the experimental findings, obtaining good matching between experimental and numerical data.
Stress Redistribution along the Interface between Concrete and FRP Subject to Long-Term Loading
Results of an experimental campaign concerning the long-term behavior of FRP plates bonded to concrete are presented. Four CFRP plates with three different bonded lengths (from 100 mm to 400 mm) have been subject to long-term loads by using a mechanical system designed to apply a traction force constant with time. The tests have been carried out in a climatic room with a constant temperature T=20°C and humidity RH=60%, for about three years. The strain profile evolution with time along the bonded length has been recorded by using a number of strain gauges along the plates. An appreciable stress redistribution with time along the plate has been observed. A simplified viscoelastic analytical model has been finally used to reproduce the experimental findings, obtaining good matching between experimental and numerical data.
Stress Redistribution along the Interface between Concrete and FRP Subject to Long-Term Loading
Mazzotti, C. (author) / Savoia, M. (author)
Advances in Structural Engineering ; 12 ; 651-661
2009-10-01
11 pages
Article (Journal)
Electronic Resource
English
bond , concrete , FRP , long-term load
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