Composite behavior of a novel insulated concrete sandwich wall panel reinforced with GFRP shear grids

Effects of insulation types

Jun Hee Kim, Young Chan You

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)899-913
Number of pages15
JournalMaterials
Volume8
Issue number3
DOIs
Publication statusPublished - 2015 Jan 1

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Glass fibers
Polystyrenes
Insulation
Polymers
Concretes
Composite materials
X ray photoelectron spectroscopy
Displacement control
Bending strength
Foams
fiberglass
Mechanical properties

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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abstract = "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.",
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Composite behavior of a novel insulated concrete sandwich wall panel reinforced with GFRP shear grids : Effects of insulation types. / Kim, Jun Hee; You, Young Chan.

In: Materials, Vol. 8, No. 3, 01.01.2015, p. 899-913.

Research output: Contribution to journalArticle

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