International Journal of Green Management and Business Studies (IJGMBS)
DOI https://www.doi.org/10.56830/IJGMBS12202101
Author
Hamdy M. Mohamed
Abstract
Green and Sustainability are big words these days. Recently, the demand for more green
construction or sustainable construction has been driven largely by consumers in the construction
sector. In this study, new filament wound glass fiber-reinforced polymer (GFRP) tubes are used
as an FRP-stay in place structural formwork for concrete beams. The test results of an
experimental study carried out on 230 mm diameter and 2000 mm long concrete filled FRP tubes
(CFFTs) beams are presented. Three CFFT beams and two control specimens without tube were
tested under four-point bending. One control specimen was reinforced with steel spirals of stiffness
equivalent to the GFRP tube and the other had no transverse reinforcement. The parameters used
in this investigation include the effect of laminate thickness of FRP tubes, the type of the internal
reinforcements (steel or GFRP bars) and the type of transverse reinforcements (spiral steel or
FRP tubes). The fiber orientations of the tubes were mainly in the hoop direction. The two control
specimens failed in shear; however, using GFRP tubes instead of transverse steel reinforcement
changed the mode of failure of the three CFFT beams to flexural failure. In addition, the GFRP
tubes confine the concrete core which subsequently increases the ultimate compression capacity
and the ductility of the specimens. Also, test results indicate that the GFRP tube enhances the
flexural strength of the specimens, whereas it provides a longitudinal reinforcement in the tension
side.
Keywords: Green, Beam; Concrete; Flexural; Fiber-Reinforced Polymer; Tubes.
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