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.
Diab, H. M., & 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
MLA
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
HARVARD
Diab, H. M., 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
VANCOUVER
Diab, H. M., 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
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