Durability of reinforced concrete beams strengthened by galvanized steel mesh-epoxy systems under harsh environmental conditions

Al‐Nuaimi, Nasser; Sohail, Muazzam Ghous; Hawileh, Rami A.; Abdalla, Jamal A.; Douier, Kais

doi:10.1016/j.compstruct.2020.112547

Cited by 27 publications

(10 citation statements)

References 38 publications

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“…Durability tests provided by Al-Nuaimi et al [56] have proven the resistance of epoxy-based steel textile to sun and saline water. A 24-month exposure showed only a marginal loss of strength.…”

Section: Bending Strengthening Of Beams and Slabsmentioning

confidence: 99%

Steel-Reinforced Polymers and Steel-Reinforced Composite Mortars for Structural Applications—An Overview

Krzywoń

2020

J. Compos. Sci.

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Bonding of external reinforcement is currently the simplest, fastest, and most popular method of strengthening concrete and masonry structures. Glass and carbon organic fibers are the dominant materials used, but alternatives also include high-strength steel wires. The mechanical properties of such steel are comparable to those of carbon fiber. Due to their good compatibility with mortars, steel wires are particularly well suited to the revitalization of historic buildings. The manuscript provides an overview of research and experience in the use of steel-reinforced polymers (SRPs) and steel-reinforced composite mortars (SRCMs, also called steel-reinforced grout (SRG)) for structural strengthening. The examples described are for concrete beams, slabs and columns, walls, and masonry arches. The results of laboratory tests are discussed. The summary presents the advantages and disadvantages of composites based on ultra-high-strength steels compared with more popular carbon fiber composites.

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Section: Bending Strengthening Of Beams and Slabsmentioning

confidence: 99%

Steel-Reinforced Polymers and Steel-Reinforced Composite Mortars for Structural Applications—An Overview

Krzywoń

2020

J. Compos. Sci.

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“…Jaafer et al in 2019 [45] employed a wire mesh-epoxy composite (WMEC) to strengthen concrete slabs. Al Nuaimi et al in 2020 [46] studied the durability of using a wire mesh-epoxy system as a strengthening material for RC members. These reports implied that the system is durable and can be an alternative material for strengthening and retrofitting RC beams under severe environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Shear Strengthening of Reinforced Concrete Beam Using Wire Mesh–Epoxy Composite

et al. 2022

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This experimental research aims to study the use of wire mesh–epoxy composite (WMEC) as a shear-strengthening technique for reinforced concrete (RC) beams by focusing on the following parameters: (1) presence of shear reinforcement in the shear span; (2) type of strengthening technique (U-jacketing, vertical U strip, or inclined strip); and (3) number of wire mesh layers (three or six layers). Nine simply supported rectangular RC beams were tested under two monotonic point loads. The testing specimens were divided into two groups: (1) five beams without shear reinforcement and (2) four beams with shear reinforcement. Load–deflection relationship, shear ductility index, beams’ stiffness, energy absorption, crack propagation, mode of failure, and strain were studied for all testing specimens and compared with those of the control beams to measure the improvement from WMEC addition. Results showed that all WMEC types enhanced the shear capacity. Among the three shear-strengthening types, the continuous U-jacket scheme had a higher effect, increasing the shear capacity between 33.4 and 95.9% and the shear ductility index by 23% relative to those of the reference specimens. The shear capacity improvement by WMEC for the beams without shear steel reinforcement was greater than that for the beams with shear reinforcement under the same shear-strengthening configuration. When the number of wire mesh layers was doubled, the ultimate load was further increased from 33.4 to 57.8%. This research showed that WMEC is a practical and excellent shear-strengthening technique for RC beams. Doi: 10.28991/CEJ-2022-08-06-09 Full Text: PDF

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“…In the past decades, FRP (fiber reinforced polymer) reinforcements have been widely used in the rehabilitation and strengthening of existing reinforced concrete (RC) structures due to their lightweight, high strength, and good corrosion resistance [1]. Many researchers have conducted experimental and numerical studies on the flexural performance of FRP-strengthened RC beams [2][3][4][5][6]. Intermediate crack-induced debonding failure is the dominant failure mode of FRP-strengthened RC beams.…”

Section: Introductionmentioning

confidence: 99%

BP Neural Network Improved by Sparrow Search Algorithm in Predicting Debonding Strain of FRP‐Strengthened RC Beams

Bai

2021

Advances in Civil Engineering

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To prevent debonding failure of FRP- (fiber reinforced polymer-) strengthened RC (reinforced concrete) beams, most codes proposed models for debonding strain limitation of FRP reinforcements. However, only a few factors that affect debonding failure are considered in the models. The experimental results show that these models cannot accurately evaluate debonding strain and have a large variability. In order to improve the accuracy of predicting the debonding strain of FRP-strengthened RC beams, a BP neural network model was developed based on the sparrow search algorithm (SSA). To predict the debonding strain of FRP reinforcements, the established neural network model was trained and simulated through experimental data. The results show that the coefficient of variation of the present SSA-BP neural network model is 13%. The main factors affecting debonding strain are the longitudinal reinforcement ratio, stirrup reinforcement ratio, and concrete strength, which are not considered in the code models. The present model has better prediction accuracy and more robustness than the traditional BP neural network and the code models.

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Durability of reinforced concrete beams strengthened by galvanized steel mesh-epoxy systems under harsh environmental conditions

Cited by 27 publications

References 38 publications

Steel-Reinforced Polymers and Steel-Reinforced Composite Mortars for Structural Applications—An Overview

Steel-Reinforced Polymers and Steel-Reinforced Composite Mortars for Structural Applications—An Overview

Shear Strengthening of Reinforced Concrete Beam Using Wire Mesh–Epoxy Composite

BP Neural Network Improved by Sparrow Search Algorithm in Predicting Debonding Strain of FRP‐Strengthened RC Beams

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