FINITE ELEMENT ANALYSIS OF FLEXURAL BEHAVIOR OF DAMAGED RC BEAMS REINFORCED BY FRP

GAO Ziqi; ZHANG Jintao; ZHANG Hao; HAO Han; GUO Rui

doi:10.13204/j.gyjzG20110321

Volume 51 Issue 5

Sep. 2021

Turn off MathJax

Article Contents

Abstract

References

Article Navigation > INDUSTRIAL CONSTRUCTION > 2021 > 51(5): 44-50,43

GAO Ziqi, ZHANG Jintao, ZHANG Hao, HAO Han, GUO Rui. FINITE ELEMENT ANALYSIS OF FLEXURAL BEHAVIOR OF DAMAGED RC BEAMS REINFORCED BY FRP[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 44-50,43. doi: 10.13204/j.gyjzG20110321

Citation:

GAO Ziqi, ZHANG Jintao, ZHANG Hao, HAO Han, GUO Rui. FINITE ELEMENT ANALYSIS OF FLEXURAL BEHAVIOR OF DAMAGED RC BEAMS REINFORCED BY FRP[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 44-50,43. doi: 10.13204/j.gyjzG20110321

Citation:

PDF( 9712 KB)

FINITE ELEMENT ANALYSIS OF FLEXURAL BEHAVIOR OF DAMAGED RC BEAMS REINFORCED BY FRP

doi: 10.13204/j.gyjzG20110321

1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Anhui Communications Planning and Design Institute Co., Ltd., Hefei 230088, China;
3. China Railway Zhengzhou Group Co., Ltd., Zhengzhou 450000, China

Received Date: 2020-11-03
Available Online: 2021-09-16
Publish Date: 2021-09-16

Abstract

Abstract

This paper mainly studied the flexural behavior of damaged RC beams reinforced by FRP grids. A control beam was designed for a four-point bending test in this study. Based on the test data, a finite element model for analyzing the reinforcement effect of the FRP grid was established. The flexural behavior of the reinforcement scheme and the influence of grid spacing and FRP-concrete interface treatment on the reinforcement were obtained through the FEM analysis. The results showed that the reinforcement was very effective in improving the bearing capacity of the damaged beams, and the limit load of the beam was increased by 27.4%~43.4%. There was a greatly improvement in the overall stiffness of the beams after the reinforcement. The deflection at yield was slightly reduced and the deflection at failure hardly changed. For beams with different anchoring conditions, the limit load of the unanchored beams was about 10% higher than that of the anchored beams.
- FRP grid,
- damaged RC beam,
- finite element analysis,
- flexural reinforcement

FullText(HTML)

References(14)

References

[1]	吴文贵, 徐永模.中国混凝土与水泥制品工业年鉴(2016)[M].北京:中国学术期刊电子出版社, 2017:314-315.
[2]	申士军.损伤混凝土结构加固性能及加固后耐久性研究[D].杭州:浙江大学, 2014.
[3]	GUO R, PAN Y, CAI L H, et al. Bonding Behavior and Shear Strengthening Effect of CFRP Grid with PCM Shotcrete Method[J]. Engineering Structures, 2018, 168(2):333-345.
[4]	岳清瑞. 我国碳纤维(CFRP)加固修复技术研究应用现状与展望[J]. 工业建筑, 2000, 30(10):23-26.
[5]	刘其卓.碳纤维布加固不同损伤混凝土梁抗弯性能的试验研究[D].武汉:武汉理工大学, 2004.
[6]	LEE H K, HAUSMANN L R. Structural Repair and Strengthening of Damaged RC Beams with Sprayed FRP[J]. Composite Structures, 2004, 63(2):201-209.
[7]	郭瑞, 任宇, 潘毅, 等.CFRP网格-聚合物水泥砂浆加固RC梁的抗剪性能与计算公式[J]. 土木工程学报, 2020, 53(3):1-10.
[8]	潘毅, 胡文豪, 郭瑞, 等.碳纤维增强复合网格-聚合物水泥砂浆加固RC梁的抗弯性能试验研究[J]. 建筑结构学报, 2020, 41(4):119-128.
[9]	徐文冰. 基于混凝土塑性损伤理论的FRP抗剪加固RC梁有限元分析[D].深圳:深圳大学, 2015.
[10]	何庆锋, 毛佳伟.碳纤维复材修复损伤钢筋混凝土梁抗弯性能试验研究[J]. 工业建筑, 2019, 49(6):14-19.
[11]	中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB 50010-2011[S].北京:中国建筑工业出版社, 2011.
[12]	杨飞, 董新勇, 周沈华, 等.ABAQUS混凝土塑性损伤因子计算方法及应用研究[J]. 四川建筑, 2017, 37(6):173-177.
[13]	陆新征, 叶列平, 滕锦光, 等.FRP-混凝土界面黏结滑移本构模型[J]. 建筑结构学报, 2005, 26(4):10-18.
[14]	陆新征, 滕锦光, 叶列平, 等.FRP加固混凝土梁受弯剥离破坏的有限元分析[J]. 工程力学, 2006(6):85-93.