Analysis on Calculation Model for Shear Capacity of Rust-Stirrup Reinforced Concrete Beams Strengthened with Fiber Reinforced Polymer

doi:10.11902/1005.4537.2021.274

Journal of Chinese Society for Corrosion and protection

2022, Vol. 42

Issue (5): 861-866 DOI: 10.11902/1005.4537.2021.274

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Analysis on Calculation Model for Shear Capacity of Rust-Stirrup Reinforced Concrete Beams Strengthened with Fiber Reinforced Polymer

TANG Shiying¹, LIU Jie¹, CHEN Haodong¹, ZHANG Jiahao¹, LI Weiwen¹^,²(

), YANG Xu³

^1.Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, China
^2.College of Civil Engineering, Shenzhen University, Shenzhen 518060, China
^3.School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, China

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Abstract

A calculation model of shear capacity for the rust steel-stirrup reinforced concrete beams strengthened with fiber reinforced polymer (FRP) was proposed based on the simplified modified compression field theory (SMCFT), which is considered a few important factors of the existing experiment results, the change of protectiveness of the rust beam, the corrosion rate and yield strength of stirrups etc. Then, 58 groups of test data and three calculation models are collected and analyzed from FRP strengthened rust steel-stirrup reinforced concrete beams are collected and analyzed from of the existing literature. It is proved that the average value and variance of the ratio between the calculated values and the test values of the proposed model in this paper are the smallest, which reflects that the validity of the proposed calculation model for the rust stirrup concrete beam strengthened with FRP.

Key words: FRP corroded stirrup shear capacity SMCFT data statistics

Received: 29 September 2021

ZTFLH:

TU375

Fund: National Natural Science Foundation of China(51878415);National Natural Science Foundation of China(51908373)

Corresponding Authors: LI Weiwen E-mail: liweiwen@szu.edu.cn

About author: LI Weiwen, E-mail: liweiwen@szu.edu.cn

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Cite this article:

TANG Shiying, LIU Jie, CHEN Haodong, ZHANG Jiahao, LI Weiwen, YANG Xu. Analysis on Calculation Model for Shear Capacity of Rust-Stirrup Reinforced Concrete Beams Strengthened with Fiber Reinforced Polymer. Journal of Chinese Society for Corrosion and protection, 2022, 42(5): 861-866.

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2021.274 OR https://www.jcscp.org/EN/Y2022/V42/I5/861

Fig.1 Test beam size and reinforcement diagram (a) front elevation (b) cross section

Table 1 Size information of test beam

Fig.2 Shear-displacement curve of test beam

Fig.3 Diagram of beam cross-section reduction: (a) s<5.5c, (b) s=5.5c, (c) s>5.5c

Fig.4 Flow chart of model

Model	V_c	V_s	V_f
Li et al^[14]	$a c v f t b h 0$	$ϕ f y v A v h 0 / s$	$ϕ f A f E f ε f e d f s f$
EI-Maaddawy^[15]	2.2 $f c ρ w d a 13 b w d$	$(1 - 0.01 C r) f y v A v h 0$	$ϕ f A f E f ε f e d f s f$
AK. EL-SAYED^[12]	$0.17 λ f c b w, e f f h 0$	$f y v A w, e f f h 0$	$ϕ f A f, e f f E f ε f e d f s f$

Table 2 Summary of models in the existing literature

Fig.5 Test results of different models were compared with the calculated results: (a) V_exp/ V₁, (b) V_exp/ V₂, (c) V_exp/ V₃

Fig.6 Model results are compared with the test results

Table 3 Comparison of discrete indicators of different models

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