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Title |
Structural Integrity Evaluation of Mechanically Fastened FRP Beams Under the Effects of Sustained Loads and Environments
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Keywords |
FRP 보강 ; 환경영향 ; 지속하중 ; 휨실험 ; MF-FRP 보강보 FRP strengthening ; Environmental effects ; Sustained load ; Flexural Test ; MF-FRP beam |
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Abstract |
Mechanically fastening FRP (MF-FRP) strips using nails and anchors, has been shown to provide a more ductile behavior to the strengthened structural element than using bonded FRP. To further advance the state of the knowledge on this strengthening method, the current study examined environmental effects for six months on MF-FRP beams. Reinforced concrete beams strengthened with mechanically fastened FRP strips and subjected to sustained loads for six months were exposed to outdoor weather and constant high temperatures (40℃). For comparison, the behavior of RC beam with and without sustained loads was evaluated. Results from flexural tests did not show any significant degradation or change of failure mode as a result of sustained load and of environmental effects such as high temperatures and outdoor weather over a period of six months. Failure of the beams was governed by FRP delamination followed by concrete crushing as not much load applied to the nail and anchors because of slip effects.
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