Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Spalling of concrete cover of fiber-reinforced polymer reinforced concrete under thermal loads
Abstract A finite element method using a proposed mesoscopic thermoelastic damage model (MTED) is verified for simulating the cracking process of a concrete section reinforced with fibre-reinforced polymer (FRP) bars. The cracking was due to the significant difference in thermal expansion properties between the concrete and the FRP materials at elevated temperatures. The numerical study reveals that although a conventional elastic analytical method can provide good estimates of the critical temperature increment of concrete cover failure of a cylindrical concrete section that is reinforced with a single bar, it gives too conservative predictions for typical rectangular sections with multiple bars. The study also shows that the concrete cover and the horizontal bar spacing have more influence than the vertical bar spacing on the determination of the critical temperature increments. Horizontal lapping of bars significantly lowers the critical temperature increment.
Spalling of concrete cover of fiber-reinforced polymer reinforced concrete under thermal loads
Abstract A finite element method using a proposed mesoscopic thermoelastic damage model (MTED) is verified for simulating the cracking process of a concrete section reinforced with fibre-reinforced polymer (FRP) bars. The cracking was due to the significant difference in thermal expansion properties between the concrete and the FRP materials at elevated temperatures. The numerical study reveals that although a conventional elastic analytical method can provide good estimates of the critical temperature increment of concrete cover failure of a cylindrical concrete section that is reinforced with a single bar, it gives too conservative predictions for typical rectangular sections with multiple bars. The study also shows that the concrete cover and the horizontal bar spacing have more influence than the vertical bar spacing on the determination of the critical temperature increments. Horizontal lapping of bars significantly lowers the critical temperature increment.
Spalling of concrete cover of fiber-reinforced polymer reinforced concrete under thermal loads
Wong, Yuk-Lung (Autor:in) / Fu, Yu-Fang (Autor:in) / Poon, Chi-Sun (Autor:in) / Tang, Chun-An (Autor:in)
Materials and Structures ; 39 ; 991-999
11.07.2006
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Thermal mismatch , Temperature increment , Concrete cover spalling , Fibre-reinforced polymer , Reinforced concrete , Numerical simulation Engineering , Building Materials , Civil Engineering , Operating Procedures, Materials Treatment , Mechanical Engineering , Theoretical and Applied Mechanics , Structural Mechanics
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