Prediction of Flexural Behavior of Degraded Beam Repaired and Strengthened by CFRP Sheets Using Finite Element Method

DOI: 10.14416/j.ind.tech.2023.12.008

Authors

  • Supitcharya Areemit Department of Civil Engineering, Faculty of Engineering, Thammasat University Rangsit Campus
  • Sayan Sirimontree Department of Civil Engineering, Faculty of Engineering, Thammasat University Rangsit Campus
  • Sutthahathai Potinamtong Department of Civil Engineering, Faculty of Engineering, Thammasat University Rangsit Campus
  • Chanachai Thongchom Department of Civil Engineering, Faculty of Engineering, Thammasat University Rangsit Campus

Keywords:

Finite Element Method, Reinforced Concrete Beam, Degraded, Strengthen, Carbon Fiber Plate

Abstract

The paper presents the prediction of the flexural behavior of deteriorated concrete beams reinforced with carbon fiber sheets by a finite element model. The program ANSYS was chosen for the analysis. The results from the finite element model in terms of the load-deflection relationship are compared to results tested by the previous researcher, it was found that analytical results consistent with test results. Therefore, the model can effectively predict the flexural behavior of deteriorated reinforced concrete beams strengthened by carbon fiber sheets. The developed finite element model was used to analyze the effect of other variables on the beam flexural behavior, namely the compressive strength of concrete, tensile strength of reinforcing steel, and number of carbon fiber sheets. The results show that the effect of concrete compressive was not significant for maximum carrying load capacity for beams in all cases. The tensile strength of steel has a significant effect on the load-carrying capacity. As the number of CFRP layers has been increased, the deflection of the degraded reinforced concrete beam repaired and strengthened with CFRP sheet decreased and load load-carrying capacity of the beam significantly increased.

References

P. Joyklad and S. Suparp, Reinforced Concrete: Origin to Siam, Thailand Engineering Journal, 2014, 67(1), 17-24. (in Thai)

CPAC Concrete Academy, Concrete technology: Damage of concrete, The Concrete Product and Aggregate, Bangkok, Thailand, 2000, 143-151. (in Thai)

Department of Public Works and Town & Country Planning, Guide to building structural repair, Thammasat Printing house, Pathumthani, Thailand, 2019. (in Thai)

T. Khongsakditrakul, External reinforcement of reinforced concrete structures with fiber-reinforced materials, Civil Engineering Magazine, 2003, 14-18. (in Thai)

R.D. Cook, D.S. Malkus and M.E. Plesha, Concepts and application of finite element analysis, 3rd Ed., John Wiley & Sons Inc., WI, USA, 1988.

A. Phuhudsuan, Reinforced concrete structures of finite element analysis, Thesis, Burapha University, Thailand, 2012. (in Thai)

P. Panichsakulchai and T. Nujareon, Flexural behavior of reinforced concrete beams strengthened by CFRP strip plates, Thesis, Thammasat University, Thailand, 2020.

I. Sanan and K. Prakobsup, Behavior of reinforced concrete beams strengthened with carbon fiber reinforced polymer under repeated loading, Thesis, Thammasat University, Thailand, 2021. (in Thai)

Laminate, TDS.EU-EN.V2, S&P Clever Reinforcement Company AG, Seewen, Switzerland, 2020.

SIKA, SikaGrout-212 GP, Product Data Sheet, Version 03.01, Sika (Thailand) Ltd., Chonburi, Thailand, 2020.

Ansys, Finite element computer software for nonlinear structural analysis, Version 15.0., Ansys Inc., PA, USA, 2013.

L.V.H. Bui, C. Thongchom, S. Sirimonree, P.T. Nguyen, T.-T. Nguyen, S. Keawsawasvong, P. Nuaklong and P. Jongvivatsakul, Experimental, numerical, and analytical study of concrete beams reinforced with steel stirrups and embedded with functional plates, Structures, 2022, 39, 293-309.

K. Chueachom, Application of finite element method in analysis of flexural behavior of full scale prestressed concrete girder strengthened by external post-tension, Thesis, Thammasat University, Thailand, 2014. (in Thai)

Ansys. Finite element computer software for nonlinear structural analysis, version 18.2, Ansys Inc., PA, USA, 2017.

A. Cheng, and D.T. Cheng, Heritage and early history of the boundary element method, Engineering Analysis with Boundary Elements, 2005, 29(3), 268-302.

H.H. West, Fundamental of structural analysis, John Wiley & Sons Inc., NY, USA, 1993.

A.H. Al-Saidy, A.S. Al-Harthy, K.S. Al-Jabri, M. Abdul-Halim and N.M. Al-Shidi, Structural performance of corroded RC beams repaired with CFRP sheets, Composite Structure, 92(8), 2010, 1931-1938.

A. Lenwari, C. Thongchom and R.S. Aboutaha, Cyclic flexural performance of fire-damaged reinforced concrete beams strengthened with carbon fiber-reinforced polymer plates, ACI Structural Journal, 2020, 117(6), 133-146.

A. Sakbana and M. Mashreib, Finite element analysis of CFRP-reinforced concrete beams, Revista Ingenieria de Construccion, English Version, 2020, 35(2), 148-169.

ACI Committee 440, Guide for design and construction of externally bonded FRP systems for strengthening concrete stuctures (ACI 440.2R-17), American Concrete Institute, Farmington Hills, USA, 2017, pp 24.

TIS 24-2559, Reinforced Concrete: Deformed Bars, 2016. (in Thai)

Downloads

Published

2023-12-25

Issue

Section

บทความวิจัย (Research article)