Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Physical, mechanical, and durability characterization of preloaded GFRP reinforcing bars
This paper presents the physical, mechanical, and durability characterization of glass fiber-reinforced polymer (FRP) (GFRP) bars subjected to different tensile stress levels. FRP bars were first loaded at levels up to 20, 40, 60, and 80% of their ultimate tensile strength (UTS) which could create cracks and microcracks in the FRP bars and affect the long-term durability of the product. Microstructural observations were conducted on preloaded GFRP reinforcing bars to show the deterioration of fiber, matrix, and the fiber/matrix interface. Moisture absorption and tensile properties of loaded bars were also measured to estimate the potential effects of cracks and microcracks on durability-related properties and on short-term mechanical properties, respectively. Loaded bars were also embedded in a moist mortar at elevated temperature to perform accelerated aging. The measured tensile strengths of the loaded bars before and after exposure were considered as a measure of the durability performance of the specimens. Results showed that the GFRP bars start to be slightly affected by the tensile stress at 60% of the UTS. These results showed that the loading of GFRP bars did not have a dramatic effect on the durability of the bars even when a pronounced tensile stress, which was approximately 80% of the UTS, takes place.
Physical, mechanical, and durability characterization of preloaded GFRP reinforcing bars
This paper presents the physical, mechanical, and durability characterization of glass fiber-reinforced polymer (FRP) (GFRP) bars subjected to different tensile stress levels. FRP bars were first loaded at levels up to 20, 40, 60, and 80% of their ultimate tensile strength (UTS) which could create cracks and microcracks in the FRP bars and affect the long-term durability of the product. Microstructural observations were conducted on preloaded GFRP reinforcing bars to show the deterioration of fiber, matrix, and the fiber/matrix interface. Moisture absorption and tensile properties of loaded bars were also measured to estimate the potential effects of cracks and microcracks on durability-related properties and on short-term mechanical properties, respectively. Loaded bars were also embedded in a moist mortar at elevated temperature to perform accelerated aging. The measured tensile strengths of the loaded bars before and after exposure were considered as a measure of the durability performance of the specimens. Results showed that the GFRP bars start to be slightly affected by the tensile stress at 60% of the UTS. These results showed that the loading of GFRP bars did not have a dramatic effect on the durability of the bars even when a pronounced tensile stress, which was approximately 80% of the UTS, takes place.
Physical, mechanical, and durability characterization of preloaded GFRP reinforcing bars
Physikalische, mechanische und Haltbarkeitscharakterisierung von vorbelasteten Armierungsstäben betsehend aus glasfaservertärktem Kunststoff
Robert, Mathieu (Autor:in) / Benmokrane, Brahim (Autor:in)
Journal of Composites for Construction ; 14 ; 368-375
2010
8 Seiten, 10 Bilder, 3 Tabellen, 27 Quellen
Aufsatz (Zeitschrift)
Englisch
Physical, Mechanical, and Durability Characterization of Preloaded GFRP Reinforcing Bars
| British Library Online Contents | 2010
Physical, Mechanical, and Durability Characterization of Preloaded GFRP Reinforcing Bars
| Online Contents | 2010
Durability investigations of GFRP reinforcing bars
| British Library Online Contents | 2004
PRODUCTS - Durability investigations of GFRP reinforcing bars
| Online Contents | 2004
Durability of GFRP Reinforcing Bars in Alkaline Environment
| British Library Conference Proceedings | 2001