Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test
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 prope...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2020-01-01
|
Series: | Advances in Materials Science and Engineering |
Online Access: | http://dx.doi.org/10.1155/2020/3186832 |
id |
doaj-1421220ef9434fa0b2010648677a978f |
---|---|
record_format |
Article |
spelling |
doaj-1421220ef9434fa0b2010648677a978f2020-11-25T02:10:04ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/31868323186832Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out TestZheng-zhen Wang0Wei-ming Gong1Guo-liang Dai2Ling-feng Liu3Key Laboratory for RC and PRC Structure of Education Ministry, School of Civil Engineering, Southeast University, No.2 Sipailou, Nanjing, Jiangsu 210096, ChinaKey Laboratory for RC and PRC Structure of Education Ministry, School of Civil Engineering, Southeast University, No.2 Sipailou, Nanjing, Jiangsu 210096, ChinaKey Laboratory for RC and PRC Structure of Education Ministry, School of Civil Engineering, Southeast University, No.2 Sipailou, Nanjing, Jiangsu 210096, ChinaKey Laboratory for RC and PRC Structure of Education Ministry, School of Civil Engineering, Southeast University, No.2 Sipailou, Nanjing, Jiangsu 210096, ChinaDue 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.http://dx.doi.org/10.1155/2020/3186832 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zheng-zhen Wang Wei-ming Gong Guo-liang Dai Ling-feng Liu |
spellingShingle |
Zheng-zhen Wang Wei-ming Gong Guo-liang Dai Ling-feng Liu Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test Advances in Materials Science and Engineering |
author_facet |
Zheng-zhen Wang Wei-ming Gong Guo-liang Dai Ling-feng Liu |
author_sort |
Zheng-zhen Wang |
title |
Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test |
title_short |
Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test |
title_full |
Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test |
title_fullStr |
Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test |
title_full_unstemmed |
Analysis of Bond Behavior of FRP-Confined Concrete Piles Based on Push-Out Test |
title_sort |
analysis of bond behavior of frp-confined concrete piles based on push-out test |
publisher |
Hindawi Limited |
series |
Advances in Materials Science and Engineering |
issn |
1687-8434 1687-8442 |
publishDate |
2020-01-01 |
description |
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. |
url |
http://dx.doi.org/10.1155/2020/3186832 |
work_keys_str_mv |
AT zhengzhenwang analysisofbondbehavioroffrpconfinedconcretepilesbasedonpushouttest AT weiminggong analysisofbondbehavioroffrpconfinedconcretepilesbasedonpushouttest AT guoliangdai analysisofbondbehavioroffrpconfinedconcretepilesbasedonpushouttest AT lingfengliu analysisofbondbehavioroffrpconfinedconcretepilesbasedonpushouttest |
_version_ |
1715556609715863552 |