Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fiber-reinforced polymer-systems have been used to improve the performance of concrete compression members by a confinement effect on the concrete core. The objective of this study is to investigate the use of fiber-reinforced polymer (FRP) systems in the strengthening of rectangular reinforced concrete columns with a section having an aspect ratio of about 3.65, which are typical in construction of monolithic housing apartments, without having to reprofile the geometry of the columns. A simple analytical approach is proposed herein to evaluate the axial load capacity of the strengthened columns. From the work carried out in the study, it is confirmed that 1. Transverse fiber sheets led to an increase in the axial load capacity of the column by confining the concrete; 2. Longitudinal fiber sheets also enhance the axial load capacity, if adequately confined by outer transverse fiber sheets; 3. The plaster finishes resulted in poor ductility of the column in general, as they are likely to become detached from the original concrete section at ultimate load; 4. Delamination of the fiber sheets is more likely to occur in the case of glass fiber fabric than for carbon fiber sheets for the systems investigated in the study; 5. Anchoring the transverse fiber sheets along the wider faces of the column led to better confinement of the concrete: 6. The axial load capacity of the strengthened column can be conservatively evaluated by assuming a longitudinal strain of 0.2 % and a transverse strain of 0.1 % in the fiber sheets.
Fiber-reinforced polymer-systems have been used to improve the performance of concrete compression members by a confinement effect on the concrete core. The objective of this study is to investigate the use of fiber-reinforced polymer (FRP) systems in the strengthening of rectangular reinforced concrete columns with a section having an aspect ratio of about 3.65, which are typical in construction of monolithic housing apartments, without having to reprofile the geometry of the columns. A simple analytical approach is proposed herein to evaluate the axial load capacity of the strengthened columns. From the work carried out in the study, it is confirmed that 1. Transverse fiber sheets led to an increase in the axial load capacity of the column by confining the concrete; 2. Longitudinal fiber sheets also enhance the axial load capacity, if adequately confined by outer transverse fiber sheets; 3. The plaster finishes resulted in poor ductility of the column in general, as they are likely to become detached from the original concrete section at ultimate load; 4. Delamination of the fiber sheets is more likely to occur in the case of glass fiber fabric than for carbon fiber sheets for the systems investigated in the study; 5. Anchoring the transverse fiber sheets along the wider faces of the column led to better confinement of the concrete: 6. The axial load capacity of the strengthened column can be conservatively evaluated by assuming a longitudinal strain of 0.2 % and a transverse strain of 0.1 % in the fiber sheets.
Strength enhancement of rectangular reinforced concrete columns using fiber-reinforced polymer
Verstärkung von rechteckig verstärkten Betonpfeilern unter Verwendung von faserverstärktem Kunststoff
Tan, K.H. (Autor:in)
Journal of Composites for Construction ; 6 ; 175-183
2002
9 Seiten, 8 Bilder, 4 Tabellen, 6 Quellen
Aufsatz (Zeitschrift)
Englisch
Beton , Pfeiler , Verstärkung (Festigkeit) , faserverstärkter Kunststoff , Einschließung , Rechteck , Axialbelastung , Tragfähigkeit , Wohngebäude , Berechnungsverfahren , glasfaserverstärkter Kunststoff , carbonfaserverstärkter Kunststoff , Delaminierung (Schichtablösung) , Verankerung (mechanische Befestigung)
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