Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Posttensioned FRP composite shells for concrete confinement
Experiments have shown that externally bonded fiber-reinforced polymer (FRP) jackets for square and rectangular columns are not as effective as they are for circular columns. The results of experiments on shape-modified concrete columns using posttensioned FRP shells are presented. Posttensioning was achieved by radially straining the precured FRP shell outwards to a substantial strain level, using expansive cement concrete, over a period of 60 days. The prefabricated FRP shell was also used as a stay-in-place formwork. The effectiveness of shape modification using posttensioned FRP shells is compared to FRP-confined original square and rectangular columns, as well as shape-modified columns with nonshrink grout and externally bonded FRP jackets. It is shown that shape modification with posttensioning of FRP shells, using expansive cement concrete, can change the confinement from passive to active and improve significantly the axial strength and ultimate compressive axial strain capacity of square and rectangular columns.
Posttensioned FRP composite shells for concrete confinement
Experiments have shown that externally bonded fiber-reinforced polymer (FRP) jackets for square and rectangular columns are not as effective as they are for circular columns. The results of experiments on shape-modified concrete columns using posttensioned FRP shells are presented. Posttensioning was achieved by radially straining the precured FRP shell outwards to a substantial strain level, using expansive cement concrete, over a period of 60 days. The prefabricated FRP shell was also used as a stay-in-place formwork. The effectiveness of shape modification using posttensioned FRP shells is compared to FRP-confined original square and rectangular columns, as well as shape-modified columns with nonshrink grout and externally bonded FRP jackets. It is shown that shape modification with posttensioning of FRP shells, using expansive cement concrete, can change the confinement from passive to active and improve significantly the axial strength and ultimate compressive axial strain capacity of square and rectangular columns.
Posttensioned FRP composite shells for concrete confinement
Yan, Zihan (Autor:in) / Pantelides, Chris P. (Autor:in) / Reaveley, Lawrence D. (Autor:in)
Journal of Composites for Construction ; 11 ; 81-90
2007
10 Seiten, 14 Bilder, 2 Tabellen, 14 Quellen
Aufsatz (Zeitschrift)
Englisch
Posttensioned FRP Composite Shells for Concrete Confinement
| British Library Online Contents | 2007
Posttensioned FRP Composite Shells for Concrete Confinement
| Online Contents | 2007
Confinement Model of Concrete with Externally Bonded FRP Jackets or Posttensioned FRP Shells
| British Library Online Contents | 2007
Confinement Model of Concrete with Externally Bonded FRP Jackets or Posttensioned FRP Shells
| Online Contents | 2007