|Table of Contents|

Analysis of reinforcement performance of CFRP strips on concrete columns with different cross-sections(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年03期
Page:
40-49
Research Field:
建筑结构
Publishing date:

Info

Title:
Analysis of reinforcement performance of CFRP strips on concrete columns with different cross-sections
Author(s):
CHENG Donghui;  YAO Yuhang;  WANG Li
(School of Civil Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, China)
Keywords:
reinforced concrete column;  CFRP strip;  axial compression;  mechanical performance
PACS:
TU398
DOI:
10.19815/j.jace.2021.12004
Abstract:
In order to explore the reinforcement performance of carbon fiber reinforced polymer(CFRP)strip on concrete columns with different cross-sections, three groups of reinforced concrete columns were designed and fabricated with parameters such as strip amount, net spacing and net width of strips as control variables. The first group of specimens was a square section, the second group of specimens was a T-shaped section, the third group of specimens was based on the second group of specimens, and angle steel was used to anchor CFRP sheets at the corner of flange and web. Axial compression tests were carried out on three groups of reinforced concrete specimens, and the ultimate load, axial deformation and failure mode of the specimens were obtained. Based on the experimental data, a number of concrete short columns confined by CFRP strip were established by finite element software ABAQUS, and their mechanical properties were analyzed. According to the experimental data and finite element analysis results, the calculation formulas of ultimate bearing capacity of square section reinforced concrete columns and T-shaped section reinforced concrete columns confined by CFRP strips and angle steel anchored CFRP strips were proposed. The results show that the bearing capacity of reinforced concrete columns increases with the increase of CFRP strip usage. When the amount of CFRP strips is the same, the ultimate bearing capacity increases with the decrease of the net spacing of the strips. The use of angle steel to anchor CFRP strips at the flange and web corners of T-shaped columns can better exert the tensile strength of CFRP strips and improve the ultimate bearing capacity of concrete columns.

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Last Update: 2023-05-20