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Diab, H., Abass, M. (2010). TIME-DEPENDENT DEFLECTION OF PRESTRESSED AND NON-PRESTRESSED FRP-STRENGTHENED STRUCTURES. JES. Journal of Engineering Sciences, 38(No 3), 641-653. doi: 10.21608/jesaun.2010.124387
H. M. Diab; Mamdouh Abass. "TIME-DEPENDENT DEFLECTION OF PRESTRESSED AND NON-PRESTRESSED FRP-STRENGTHENED STRUCTURES". JES. Journal of Engineering Sciences, 38, No 3, 2010, 641-653. doi: 10.21608/jesaun.2010.124387
Diab, H., Abass, M. (2010). 'TIME-DEPENDENT DEFLECTION OF PRESTRESSED AND NON-PRESTRESSED FRP-STRENGTHENED STRUCTURES', JES. Journal of Engineering Sciences, 38(No 3), pp. 641-653. doi: 10.21608/jesaun.2010.124387
Diab, H., Abass, M. TIME-DEPENDENT DEFLECTION OF PRESTRESSED AND NON-PRESTRESSED FRP-STRENGTHENED STRUCTURES. JES. Journal of Engineering Sciences, 2010; 38(No 3): 641-653. doi: 10.21608/jesaun.2010.124387

TIME-DEPENDENT DEFLECTION OF PRESTRESSED AND NON-PRESTRESSED FRP-STRENGTHENED STRUCTURES

Article 3, Volume 38, No 3, May and June 2010, Page 641-653  XML PDF (173.93 K)
Document Type: Research Paper
DOI: 10.21608/jesaun.2010.124387
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Authors
H. M. Diab1; Mamdouh Abass2
1Department of Civil Engineering, Assiut University, Egypt
2Department of Civil Engineering, Sohag University, Egypt
Abstract
External bonding of fiber reinforced polymer (FRP) sheets has been proven to be an effective method to strengthen and retrofit deteriorated or damage RC or PC structures. However, the long-term serviceability of such FRP-strengthened beams is still a concern due to lack of long-term performance data especially for prestressed FRP sheets. This study presents a manual method for predicting the short-term and time-dependent deflections for RC beams strengthened by prestressed or non-prestressed FRP sheets. The age-adjusted effective modulus method is used to model the creep behavior in concrete and the relaxation in FRP prestressing sheets. A tension-stiffening model is presented to evaluate the stiffness of the cracked section. The analytical values are compared to the results obtained from a finite element code, and to the experimental results from some existing papers. It is found that the analytical method is in a good agreement with finite element methods.
Keywords
Fiber reinforced polymer; concrete; time dependent deflection; prestressed FRP sheets; creep
Main Subjects
Civil Engineering: structural, Geotechnical, reinforced concrete and steel structures, Surveying, Road and traffic engineering, water resources, Irrigation structures, Environmental and sanitary engineering, Hydraulic, Railway, construction Management.
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