Experimental study on compressive behavior and failure analysis of composite concrete confined by glass/epoxy ±55° filament wound pipes

This paper investigates the strength and ductility of concrete confined by Glass/Epoxy ±55° Filament Wound Pipes (GFRP) under axial compression. A total of 24 cylindrical specimens were prepared with expansive and Portland cements, properly compacted and un-compacted for different composite fresh co...

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Bibliographic Details
Published inComposite structures Vol. 187; pp. 157 - 168
Main Authors Gemi, Lokman, Köroğlu, Mehmet Alpaslan, Ashour, Ashraf
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.03.2018
Subjects
Composite column
Confined concrete
Damage mechanism
Debonding
Fiber orientation
Filament winding
GFRP tubes
Micro structure
Uniaxial strength
GFRP tubes
Debonding
Micro structure
Damage mechanism
Confined concrete
Fiber orientation
Filament winding
Composite column
Uniaxial strength
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Summary:This paper investigates the strength and ductility of concrete confined by Glass/Epoxy ±55° Filament Wound Pipes (GFRP) under axial compression. A total of 24 cylindrical specimens were prepared with expansive and Portland cements, properly compacted and un-compacted for different composite fresh concrete matrix. Test results showed that compressive strength and axial deformation at failure of concrete confined with GFRP tubes increased by an average of 2.85 and 5.57 times these of unconfined concrete, respectively. Macro and micro analyses of GFRP pipes after failure were also investigated. Debonding, whitening, matrix/transfer cracking, delamination and splitting mechanisms were detected at failure, respectively. The experimental results were also employed to assess the reliability of design models available in the literature for confined concrete compressive strength.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2017.12.049