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A platform for research: civil engineering, architecture and urbanism
Performance of axially loaded short rectangular columns strengthened with carbon fiber-reinforced polymer wrapping
Many reinforced concrete bridges are deteriorating due to problems related to the environment, the increase in quantity and permissible weight of load-bearing trucks, and the underdesign of older structures. This study presents an experimental investigation on the behavior of axially loaded short rectangular columns strengthened with CFRP wrap. Three parameters were considered in this study: the concrete strength (3 ksi and 6 ksi); the aspect ratio of the cross section ; and the number of CFRP layers. The findings of this research can be summarized as follows: The confinement provided by the CFRP improves both the load-carrying capacity and the ductility of the column. 2. The gain in performance due to the wrapping, with respect to control, was greater for the 3 ksi concrete wrapped columns than for the corresponding 6 ksi concrete columns. 3. Generally, as concrete strength increased, both the axial and transverse strains substantially decreased. The square columns generally exhibited a higher dilation ratio than the rectangular columns. 4. The stiffness of the applied CFRP jacket is the key parameter in the design of the external jacket retrofits. The jacket must be sufficiently stiff to develop appropriate confining forces at relatively low column axial strain levels. A stiff jacket will better control the dilation of the cross section, resulting in larger axial strain capacities.
Performance of axially loaded short rectangular columns strengthened with carbon fiber-reinforced polymer wrapping
Many reinforced concrete bridges are deteriorating due to problems related to the environment, the increase in quantity and permissible weight of load-bearing trucks, and the underdesign of older structures. This study presents an experimental investigation on the behavior of axially loaded short rectangular columns strengthened with CFRP wrap. Three parameters were considered in this study: the concrete strength (3 ksi and 6 ksi); the aspect ratio of the cross section ; and the number of CFRP layers. The findings of this research can be summarized as follows: The confinement provided by the CFRP improves both the load-carrying capacity and the ductility of the column. 2. The gain in performance due to the wrapping, with respect to control, was greater for the 3 ksi concrete wrapped columns than for the corresponding 6 ksi concrete columns. 3. Generally, as concrete strength increased, both the axial and transverse strains substantially decreased. The square columns generally exhibited a higher dilation ratio than the rectangular columns. 4. The stiffness of the applied CFRP jacket is the key parameter in the design of the external jacket retrofits. The jacket must be sufficiently stiff to develop appropriate confining forces at relatively low column axial strain levels. A stiff jacket will better control the dilation of the cross section, resulting in larger axial strain capacities.
Performance of axially loaded short rectangular columns strengthened with carbon fiber-reinforced polymer wrapping
Die Gebrauchstüchtigkeit von achsial belasteten, kurzen, rechteckigen, mit einer carbonfaserverstärkten Kunststoff-Ummantelung verstärkten Pfeilern
Chaallal, O. (author) / Shahawy, M. (author) / Hassan, M. (author)
Journal of Composites for Construction ; 7 ; 200-208
2003
9 Seiten, 12 Bilder, 5 Tabellen, 20 Quellen
Article (Journal)
English
Beton , Pfeiler , statische Belastung , Achse (Bezugsgerade) , rechteckige Form , Verstärkung (Festigkeit) , Ummantelung , Laminieren (Mehrschichtstoff) , carbonfaserverstärkter Kunststoff , Gebrauchstauglichkeit , Duktilität , Kompressionsversuch , Druckfestigkeit , Steifigkeit , mechanische Prüfung , Querschnittsfläche
| British Library Online Contents | 2003
TESTS ON AXIALLY LOADED CONCRETE COLUMNS CONFINED BY FIBER REINFORCED POLYMER SHEET WRAPPING
| British Library Conference Proceedings | 1999
| British Library Online Contents | 2004