Open Access

REVIEW

A Review on Strengthening of Timber Beams Using Fiber Reinforced Polymers

by Bingyu Jian^1,2, Ke Cheng³, Haitao Li^1,2,*, Mahmud Ashraf^2,4, Xiaoyan Zheng^1,2, Assima Dauletbek^1,2, Mahdi Hosseini^1,2, Rodolfo Lorenzo⁵, Ileana Corbi⁶, Ottavia Corbi⁶, Kun Zhou⁷

1 College of Civil Engineering, Nanjing Forestry University, Nanjing, 210037, China
2 Joint International Research Laboratory for Bio-Composite Building Materials and Structures, Nanjing Forestry University, Nanjing, 210037, China
3 Wu Yuzhang Honors College, Sichuan University, Chengdu, 610200, China
4 Deakin University, Geelong, VIC 3216, Australia
5 University College London, London, WC1E 6BT, UK
6 University of Naples Federico II, Naples, 80133, Italy
7 Guangxi Lvjing Bamboo Industry Co., Ltd., Guilin, 541402, China

* Corresponding Author: Haitao Li. Email:

(This article belongs to the Special Issue: Bio-Composite Materials and Structures-2021)

Journal of Renewable Materials 2022, 10(8), 2073-2098. https://doi.org/10.32604/jrm.2022.021983

Received 16 February 2022; Accepted 17 March 2022; Issue published 25 April 2022

Abstract

Fiber reinforced polymer (FRP) has been used in the construction industry because of its advantages such as high strength, light weight, corrosion resistance, low density and high elasticity. This paper presents a review of bonding techniques adopted to strengthen timber beams using FRP to achieve larger spans. Different methods of bonding between FRP and timber beams have been summarized with a focus on the influencing factors and their effects as well as relevant bond-slip models proposed for fundamental understanding. Experimental investigations to evaluate the flexural performance of timber beams strengthened by FRP bars, sheets and wraps have also been critically reviewed to identify key influencing parameters. Limited research available on the shear performance of FRP reinforced timber beams have been analyzed to determine the influencing factors of the shear performance in timber-FRP beams. The paper finally presents an overall summary of the current-state-of-the-art and proposes some future research directions in the field.

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