Back to Search Start Over

Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test

Authors :
Zheng-zhen Wang
Wei-ming Gong
Guo-liang Dai
Ling-feng Liu
Source :
Advances in Materials Science and Engineering, Vol 2020 (2020)
Publication Year :
2020
Publisher :
Hindawi Limited, 2020.

Abstract

Due to the significant differences in the properties (e.g., anisotropy, elasticity modulus, and surface roughness) of fibre-reinforced polymer (FRP) and traditional pile materials, research on bond behavior between FRP tube and concrete should be conducted to ensure that they can work together properly. Push-out tests on twenty-nine GFRP-confined concrete piles were performed, the influence of bond type, slenderness ratio of FRP tube, radius-thickness ratio of FRP tube, concrete stress and concrete type on bond behavior and distribution of axial strains were studied, and simplified bond-slip constitutive models based on test results were proposed. It was found that bond type was a critical factor influencing bond behavior. A smaller radius-thickness ratio, a higher concrete stress, and the use of expansive concrete were advantageous for achieving higher bond behavior, whereas the slenderness ratio had little influence on the bond behavior. The axial strain distribution of all FRP tubes demonstrated the following rules: the upper strain was greater than the middle strain, which was larger than the lower strain, but for normal concrete specimens, the strain was linearly distributed with height, while for expanded concrete specimens, the distribution curves were polylines.

Details

Language :
English
ISSN :
16878434 and 16878442
Volume :
2020
Database :
Directory of Open Access Journals
Journal :
Advances in Materials Science and Engineering
Publication Type :
Academic Journal
Accession number :
edsdoj.1421220ef9434fa0b2010648677a978f
Document Type :
article
Full Text :
https://doi.org/10.1155/2020/3186832