A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Torsional strengthening of spandrel beams with fiber-reinforced polymer laminates
Fiber-reinforced polymer (FRP) composites can increase flexural, axial, and shear capacity of beams, columns, and walls. The present paper describes both experimental and analytical programs focused on the torsional strengthening of reinforced concrete spandrel beams using composite laminates. From the studies the following conclusions can be made: The torsional strenth of the retrofitted beams exceeded that of the baseline specimens by up to 77 %. Composites will increase the torsional strenth of reinforced concrete (RC) spandrel beams even at relatively low FRP-strain levels. The addition of anchors increased the composite contribution to the beam torsional resistance by an additional 50 %. This increase was due to the shear flow in the anchors, which also delayed the composite delamination. It is not exactly clear, however, why the lamiates without the anchor system increased the torsional capacity to the level observed. The anchored (+/- 45) laminate was the most efficient retrofit of the spandrel beams. The orientation of these laminates allowed the composite material to be stressed in the fiber direction.
Torsional strengthening of spandrel beams with fiber-reinforced polymer laminates
Fiber-reinforced polymer (FRP) composites can increase flexural, axial, and shear capacity of beams, columns, and walls. The present paper describes both experimental and analytical programs focused on the torsional strengthening of reinforced concrete spandrel beams using composite laminates. From the studies the following conclusions can be made: The torsional strenth of the retrofitted beams exceeded that of the baseline specimens by up to 77 %. Composites will increase the torsional strenth of reinforced concrete (RC) spandrel beams even at relatively low FRP-strain levels. The addition of anchors increased the composite contribution to the beam torsional resistance by an additional 50 %. This increase was due to the shear flow in the anchors, which also delayed the composite delamination. It is not exactly clear, however, why the lamiates without the anchor system increased the torsional capacity to the level observed. The anchored (+/- 45) laminate was the most efficient retrofit of the spandrel beams. The orientation of these laminates allowed the composite material to be stressed in the fiber direction.
Torsional strengthening of spandrel beams with fiber-reinforced polymer laminates
Erhöhung der Torsionsfestigkeit von Spandrillenträgern mit faserverstärkten Kunststofflaminaten
Salom, Pedro R. (author) / Gergely, Janos (author) / Young, David T. (author)
Journal of Composites for Construction ; 8 ; 157-162
2004
6 Seiten, 8 Bilder, 2 Tabellen, 4 Quellen
Article (Journal)
English
Verstärkung (Festigkeit) , Laminat , Klebverbindung , Verankerung (mechanische Befestigung) , Träger (Bauwesen) , Stahlbeton , Profil (Bauelement) , Festigkeitserhöhung , carbonfaserverstärkter Kunststoff , Prüfmethode , Messen mechanischer Größen , Retrofitting , Faserorientierung , Torsionsfestigkeit
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