Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Repair of damaged steel-concrete composite girders using carbon fiber-reinforced polymer sheets
This paper discusses the effectiveness of epoxy bonding carbon fiber reinforced polymer (CFRP) sheets to the tension flange of damaged steel-concrete composite girders to restore their ultimate load-carrying capacity and stiffness. Based on the results of the experimental investigation, the following conclusions are drawn: Ultimate load-carrying capacities of the girders significantly increased by 20, 80 and 10 % for the 25 % damaged and one-layer, 50 % damaged and three-layer, and 100 % damaged and five-layer repairing systems. The effect of CFRP bonding on the elastic stiffness of the girders was significant. The technique restored the elastic stiffness of the girder to 91, 102, an 86 % of the intact girder for the 25 % loss and one-layer, 50 % loss and three-layer, and 100 % loss and five-layer repairing systems. The effect of the technique on improving the postelastic stiffness of the repaired girder was much more pronounced. The stiffness was increased 21, 19, and 32 times as compared with the intact girder. The analytical models using the Hognestad's parabola provided an accurate estimate in the case of CFRP rupture and small loss in tension flange area. For the mode of failure due to compression crushing of concrete and moderate loss of tension flange area, the theory was fairly conservative.
Repair of damaged steel-concrete composite girders using carbon fiber-reinforced polymer sheets
This paper discusses the effectiveness of epoxy bonding carbon fiber reinforced polymer (CFRP) sheets to the tension flange of damaged steel-concrete composite girders to restore their ultimate load-carrying capacity and stiffness. Based on the results of the experimental investigation, the following conclusions are drawn: Ultimate load-carrying capacities of the girders significantly increased by 20, 80 and 10 % for the 25 % damaged and one-layer, 50 % damaged and three-layer, and 100 % damaged and five-layer repairing systems. The effect of CFRP bonding on the elastic stiffness of the girders was significant. The technique restored the elastic stiffness of the girder to 91, 102, an 86 % of the intact girder for the 25 % loss and one-layer, 50 % loss and three-layer, and 100 % loss and five-layer repairing systems. The effect of the technique on improving the postelastic stiffness of the repaired girder was much more pronounced. The stiffness was increased 21, 19, and 32 times as compared with the intact girder. The analytical models using the Hognestad's parabola provided an accurate estimate in the case of CFRP rupture and small loss in tension flange area. For the mode of failure due to compression crushing of concrete and moderate loss of tension flange area, the theory was fairly conservative.
Repair of damaged steel-concrete composite girders using carbon fiber-reinforced polymer sheets
Reparatur von beschädigten Stahlbetonträgern unter Verwendung von carbonfaserverstärkten Kunststoffplatten
Tavakkolizadeh, M. (Autor:in) / Saadatmanesh, H. (Autor:in)
Journal of Composites for Construction ; 7 ; 311-322
2003
12 Seiten, 16 Bilder, 5 Tabellen, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
Träger (Bauwesen) , Stahlbeton , Reparatur , Beschädigung , carbonfaserverstärkter Kunststoff , Platte (Halbzeug) , Laminieren (Mehrschichtstoff) , Epoxidharz , statische Belastung , Messen mechanischer Größen , Steifigkeit , Biegeprüfung , Instandhaltung , elastische Verformung , Kleben (Verbinden)
Repair of Damaged Steel-Concrete Composite Girders Using Carbon Fiber-Reinforced Polymer Sheets
| Online Contents | 2003
Repair of Damaged Steel-Concrete Composite Girders Using Carbon Fiber-Reinforced Polymer Sheets
| British Library Online Contents | 2003
| British Library Online Contents | 2008
Strengthening of Steel-Concrete Composite Girders Using Carbon Fiber Reinforced Polymers Sheets
| British Library Online Contents | 2003