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Composite Behavior of a Novel Insulated Concrete Sandwich Wall Panel Reinforced with GFRP Shear Grids: Effects of Insulation Types

by JunHee Kim 1,* and Young-Chan You 2
1
Department of Architectural Engineering, Yonsei University, 50 Yonseiro, Seodaemun-gu, Seoul 120-749, Korea
2
Department of Building Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-ro, Gogang-si, Gyeonggi-do 411-712, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Geminiano Mancusi
Materials 2015, 8(3), 899-913; https://doi.org/10.3390/ma8030899
Received: 24 October 2014 / Revised: 19 December 2014 / Accepted: 15 February 2015 / Published: 3 March 2015
(This article belongs to the Section Advanced Composites)
A full-scale experimental program was used in this study to investigate the structural behavior of novel insulated concrete sandwich wall panels (SWPs) reinforced with grid-type glass-fiber-reinforced polymer (GFRP) shear connectors. Two kinds of insulation-expanded polystyrene (EPS) and extruded polystyrene (XPS) with 100 mm thickness were incased between the two concrete wythes to meet the increasing demand for the insulation performance of building envelope. One to four GFRP shear grids were used to examine the degree of composite action of the two concrete wythes. Ten specimens of SWPs were tested under displacement control subjected to four-point concentrated loads. The test results showed that the SWPs reinforced with GFRP grids as shear connectors developed a high degree of composite action resulting in high flexural strength. The specimens with EPS foam exhibited an enhanced load-displacement behavior compared with the specimens with XPS because of the relatively stronger bond between insulation and concrete. In addition, the ultimate strength of the test results was compared to the analytical prediction with the mechanical properties of only GRFP grids. The specimens with EPS insulation presented higher strength-based composite action than the ones with XPS insulation. View Full-Text
Keywords: glass-fiber-reinforced polymer (GFRP) shear grids; insulated concrete sandwich wall panels; flexural strength; composite action; insulation effect glass-fiber-reinforced polymer (GFRP) shear grids; insulated concrete sandwich wall panels; flexural strength; composite action; insulation effect
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MDPI and ACS Style

Kim, J.; You, Y.-C. Composite Behavior of a Novel Insulated Concrete Sandwich Wall Panel Reinforced with GFRP Shear Grids: Effects of Insulation Types. Materials 2015, 8, 899-913.

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