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A platform for research: civil engineering, architecture and urbanism
Time-dependent deformation of pultruded fiber reinforced polymer composite columns
Pultruded fiber-reinforced polymer (FRP) composite structural members have been used in bridges, waste-water facilities, and industrial buildings. It has become very important to predict the load-bearing capacity of pultruded FRP composite structural members under long-term sustained loading conditions, because polymer-based materials show significant time-dependent deformation characteristics. This paper investigates the time-depnedent compressive deformation for relatively long GFRP composite structural members. The objective of this investigation is to contribute a partial solution for the information need in civil engineering structural applications. Based on the investigation the following conclusions are obtained: Findley's power law model can be successfully used to estimate the time-dependent deformation of pultruded GFRP composite columns. The percent increase of strains over initial elastic strains of tested pultruded GFRP columns with various loading levels is relatively small and should not take place of geometrical variations under long-term sustained load. An average 30 % of the total strain at 2500 h occurred in the first hour, and the estimated reduction in compressive elastic modulus on GFRP composite columns under sustained axial compression is approximately 30 % over a 50-year period.
Time-dependent deformation of pultruded fiber reinforced polymer composite columns
Pultruded fiber-reinforced polymer (FRP) composite structural members have been used in bridges, waste-water facilities, and industrial buildings. It has become very important to predict the load-bearing capacity of pultruded FRP composite structural members under long-term sustained loading conditions, because polymer-based materials show significant time-dependent deformation characteristics. This paper investigates the time-depnedent compressive deformation for relatively long GFRP composite structural members. The objective of this investigation is to contribute a partial solution for the information need in civil engineering structural applications. Based on the investigation the following conclusions are obtained: Findley's power law model can be successfully used to estimate the time-dependent deformation of pultruded GFRP composite columns. The percent increase of strains over initial elastic strains of tested pultruded GFRP columns with various loading levels is relatively small and should not take place of geometrical variations under long-term sustained load. An average 30 % of the total strain at 2500 h occurred in the first hour, and the estimated reduction in compressive elastic modulus on GFRP composite columns under sustained axial compression is approximately 30 % over a 50-year period.
Time-dependent deformation of pultruded fiber reinforced polymer composite columns
Zeitabhängige Deformation von pultrudierten, faserverstärkten Kunststoff-Säulen
Choi, Y. (author) / Yuan, R.L. (author)
Journal of Composites for Construction ; 7 ; 356-362
2003
7 Seiten, 9 Bilder, 5 Tabellen, 9 Quellen
Article (Journal)
English
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