期刊
COMPOSITE STRUCTURES
卷 187, 期 -, 页码 157-168出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2017.12.049
关键词
GFRP tubes; Composite column; Uniaxial strength; Filament winding; Damage mechanism; Confined concrete; Fiber orientation; Debonding; Micro structure
This paper investigates the strength and ductility of concrete confined by Glass/Epoxy +/- 55 degrees 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.
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