Finite Element Analysis of Reinforced Concrete Beams Strengthened with Prestressed CFRP Plates with High Ductility

LIU Bin; YANG Jiaqi; LIU Tianqiao; HU Lili; FENG Peng

doi:10.3724/j.gyjzG23111328

Volume 54 Issue 6

Jun. 2024

Turn off MathJax

Article Contents

Article Navigation > INDUSTRIAL CONSTRUCTION > 2024 > 54(6): 72-80

LIU Bin, YANG Jiaqi, LIU Tianqiao, HU Lili, FENG Peng. Finite Element Analysis of Reinforced Concrete Beams Strengthened with Prestressed CFRP Plates with High Ductility[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 72-80. doi: 10.3724/j.gyjzG23111328

Citation:

LIU Bin, YANG Jiaqi, LIU Tianqiao, HU Lili, FENG Peng. Finite Element Analysis of Reinforced Concrete Beams Strengthened with Prestressed CFRP Plates with High Ductility[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 72-80. doi: 10.3724/j.gyjzG23111328

Citation:

PDF( 9458 KB)

Finite Element Analysis of Reinforced Concrete Beams Strengthened with Prestressed CFRP Plates with High Ductility

doi: 10.3724/j.gyjzG23111328

1. China University of Mining and Technology (Beijing), Beijing 100083, China;
2. Beijing University of Technology, Beijing 100124, China;
3. Shanghai Jiao Tong University, Shanghai 200240, China;
4. Tsinghua University, Beijing 100084, China

Received Date: 2023-11-13
Available Online: 2024-06-24

Abstract

Abstract

Carbon fiber-reinforced polymer (CFRP) has been widely used in structural strengthening due to its light weight, high strength and anti-corrosion. Specifically, in strengthening RC beams, various strengthening techniques, such as external bonding, near-surface mounting and prestressing, have been developed so far. However, due to the brittle nature of the CFRP material and the interface of concrete bonded with CFRP plates, strengthened beams used to exhibit brittle failure at low ductility. Therefore, a novel strengthening method with high ductility and prestressed CFRP plates was proposed based on previous findings on the mid-span-supported strengthening technique by changing the mid-span deviators to elastic-plastic devices. The effectiveness of the proposed strengthening method was verified by finite element analysis. The finding indicated the new method could maintain the CFRP at a high stress level and increase the ultimate deflection up to 137% in limited loss of ultimate strength. The results could be reference to further development of structural strengthening methods.
- CFRP,
- prestress,
- strengthening,
- concrete beams,
- ductility,
- finite element analysis

FullText(HTML)

References(20)

References

[1]	杨心壤.为桥梁戴上"健康手环":公路桥梁结构健康检测系统初探[J].中国公路,2022(10):20-21.
[2]	中交路桥科技有限公司. 桥梁检测市场\|90万座桥梁,危桥病桥占45%[EB/OL].[2023-11-13 ].http://www.zjlq.net/Article/Article_5353.html.
[3]	梅葵花,王凤轩,孙胜江.纤维增强复合材料加固混凝土桥梁结构研究进展[J].建筑科学与工程学报,2024(1):31-51.
[4]	吴刚,安琳,吕志涛.碳纤维布用于钢筋混凝土梁抗弯加固的试验研究[J].建筑结构,2000(7):3-6,10.
[5]	李荣,滕锦光,岳清瑞.FRP材料加固混凝土结构应用的新领域:嵌入式(NSM)加固法[J].工业建筑,2004,34(4):5-10.
[6]	YANG J Q, FENG P, LIU B, et al. Strengthening RC beams with mid-span supporting prestressed CFRP plates: an experimental investigation[J]. Engineering Structures, 2022, 272,115022.
[7]	彭晖,尚守平,金勇俊.预应力碳纤维板加固受弯构件的试验研究[J].工程力学,2008(5):142-151.
[8]	尚守平,彭晖,童桦.预应力碳纤维布材加固混凝土受弯构件的抗弯性能研究[J].建筑结构学报,2003(5):24-30.
[9]	HAJIHASHEMI A,MOSTOFINEJAD D,AZHARI M. Investigation of RC beams strengthened with prestressed NSM CFRP laminates[J]. Journal of Composites for Construction, 2011,15(6):887-895.
[10]	RAAFAT E-H, KHALED S. Prestressed near-surface mounted fibre reinforced polymer reinforcement for concrete structures: a review1[J]. Canadian Journal of Civil Engineering, 2013,40: 1127-1139.
[11]	KIM Y J, SHI C Y, GREEN M F. Ductility and cracking behavior of prestressed concrete beams strengthened with prestressed CFRP sheets[J]. Journal of Composites for Construction, 2008(12): 274-283.
[12]	CHAHROUR A, SOUDKI K. Flexural response of reinforced concrete beams strengthened with end anchored partially bonded carbon fiber-reinforced polymer strips[J]. Journal of Composites for Construction, 2005, 9(2): 170-177.
[13]	CHOI H T, WEST J S, SOUDKI K A. Analysis of the flexural behavior of partially bonded FRP strengthened concrete beams[J]. Journal of Composites for Construction, 2008, 12(4): 375-386.
[14]	SEO S Y, LEE M S, FEO L. Flexural analysis of RC beam strengthened by partially de-bonded NSM FRP strip[J]. Composites Part B, 2016, 101(9): 21-30.
[15]	张智梅, 黄庆彬. 部分黏结 FRP 加固混凝土梁抗弯性能研究[J]. 铁道科学与工程学报, 2020, 17(4): 965-971.
[16]	YANG J Q, SMITH S T, WANG Z Y, et al. Numerical simulation of FRP-strengthened RC slabs anchored with FRP anchors[J]. Construction and Building Materials, 2018, 172:735-50.
[17]	Comite Euro-International Du Beton. CEB-FIP Model Code 1990: Design Code[S]. London: Thomas Telford, 1993.
[18]	SANEZ L P. Discussion of equation for the stress-strain curve of concrete by Desayi P and Krishnan S[J]. Journal of American Concrete Institute, 1964,61: 1229-1235.
[19]	HORDIJK D A. Local approach to fatigue of concrete[D]. Delft: Technische Universiteit Delft, 1991.
[20]	CHEN G M, TENG J G, CHEN J F. Finite-element modelling of intermediate crack debonding in FRP-plated RC beams[J]. Journal of Composites for Construction, ASCE, 2011, 15 (3): 339-353.