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All Journal Civil Engineering Journal
Junaid, M. Talha
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Civil Engineering, Building, Construction & Architecture

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Journal : Civil Engineering Journal

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Experimental and Numerical Analysis of Punching Shear of GFRP-RC Slabs Al-Ateyat, Aroob; Barakat, Samer; Junaid, M. Talha; Altoubat, Salah; Maalej, Mohamed; Awad, Raghad
Civil Engineering Journal Vol 10 (2024): Special Issue "Sustainable Infrastructure and Structural Engineering: Innovations in
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-SP2024-010-017

Abstract

This study investigates the punching shear behavior of Glass Fiber-Reinforced Polymer (GFRP)-reinforced concrete slabs, addressing critical gaps in current design guidelines for high-strength concrete (HSC). The objective is to evaluate the impact of concrete strength, including normal-strength concrete (NSC, 30 MPa) and HSC (60 and 90 MPa), on the punching shear resistance, bridging the lack of experimental data that limits the use of HSC in FRP-reinforced slabs. The research employs experimental testing on three full-scale slab specimens (1.5 m × 1.5 m × 0.1 m) under concentric monotonic loading until failure, coupled with Finite Element Analysis (FEA) using the Concrete Damage Plasticity (CDP) model in ABAQUS. Key findings reveal that increasing concrete strength moderately enhances punching shear resistance by 5.6% and 8.9% for 100% and 200% strength increases, respectively. The FEA model successfully replicates load-deflection behavior, crack patterns, and failure mechanisms with less than a 3% deviation from experimental results. This study enriches the literature with experimental data on GFRP-reinforced slabs using HSC and verifies FEA as a robust design tool for engineers. The findings contribute to developing comprehensive design guidelines for FRP-reinforced slabs subjected to punching shear in high-strength applications. Doi: 10.28991/CEJ-SP2024-010-017 Full Text: PDF
Evaluation and Restoration of Corrosion-Damaged Post-Tensioned Concrete Structures Alsuwaidi, Hadif; Al-Sadoon, Zaid A.; Altoubat, Salah; Barakat, Samer; Junaid, M. Talha; Maalej, Mohamed; Metawa, Abdulrahman; Habib, Ahed
Civil Engineering Journal Vol 10, No 12 (2024): December
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-12-02

Abstract

This study addresses the pressing issue of chloride-induced corrosion in post-tensioned (PT) concrete structures, known for their strength and flexibility yet vulnerable to durability issues in extreme climates. The objective is to evaluate corrosion mechanisms in a PT building in the United Arab Emirates and develop a robust restoration strategy. Using a combination of nondestructive and semi-destructive testing methods, this research identifies severe deterioration in critical structural elements, such as steel tendons, PT ducts, and concrete surfaces, largely due to high chloride exposure and aggravated by environmental factors like acid rain and fluctuating temperatures and humidity. The findings reveal serious inadequacies in current maintenance practices, often overlooking long-term corrosion risks in harsh climates. In response, this study proposes a comprehensive repair strategy, including removing damaged materials and applying advanced repair products, protective coatings, and waterproofing measures to enhance the structure's durability. This case study highlights significant concerns regarding structural integrity and provides practical insights into effective maintenance and repair strategies for PT structures. By offering a targeted, sustainable intervention approach, this research contributes to developing PT maintenance protocols, particularly in regions prone to aggressive corrosion, ensuring the longevity and safety of these critical structures. Doi: 10.28991/CEJ-2024-010-12-02 Full Text: PDF
Durability of Fiber-Reinforced Polymer (FRP) Bars: Progress, Innovations and Challenges Based on Bibliometric Analysis Nassif, Nadia; Junaid, M. Talha; Maalej, Mohamed; Altoubat, Salah; Barakat, Samer A.
Civil Engineering Journal Vol 10 (2024): Special Issue "Sustainable Infrastructure and Structural Engineering: Innovations in
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-SP2024-010-09

Abstract

This review systematically examines the literature on the Fiber-Reinforced Polymer (FRP) bars durability in concrete matrices using bibliometric analysis to understand progress, innovations, and challenges. The objective is to explore the durability of FRP bars, which are recognized for their strength-to-weight ratio, corrosion resistance, and non-conductivity, as a potential substitute to conventional steel reinforcement. Methods involved employing bibliometric tools such as Biblioshiny and VOSviewer to analyze trends, collaboration patterns, and the global distribution of publications. Findings reveal an increase in research activity over the past two decades, significant international collaboration, and leading contributions from key countries. Critical environmental factors like alkalinity, thermal conditions, and chemical aggressors affecting the interface of fiber-matrix mechanical properties were highlighted. Advances in predictive modeling for long-term behavior conditioned FRP bars are studied, steering future research towards improved durability and sustainable construction practices. This study contributes novelty by providing a comprehensive bibliometric perspective on FRP bar durability, identifying emerging trends, and suggesting areas for future suggested research to enhance the reliability and application of FRP bars in construction. Doi: 10.28991/CEJ-SP2024-010-09 Full Text: PDF
Rehabilitation of Partially Corrosion-Damaged Post-Tensioned Concrete Structures Using Carbon Fiber Reinforced Polymer Alsuwaidi, Hadif; Habib, Ahed; Al-Sadoon, Zaid A.; Maalej, Mohamed; Altoubat, Salah; Barakat, Samer; Junaid, M. Talha
Civil Engineering Journal Vol. 11 No. 6 (2025): June
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-06-014

Abstract

This study provides a comprehensive assessment of the deterioration and rehabilitation of post-tensioned (PT) concrete structures affected by chloride-induced corrosion. Through a detailed case study in the United Arab Emirates, the research identifies moisture ingress and inadequate waterproofing as primary contributors to corrosion in PT tendons and ducts, significantly compromising structural integrity. A rigorous evaluation using nondestructive and semi-destructive testing techniques was conducted to quantify damage and determine the extent of degradation. The results revealed severe corrosion in critical structural elements, necessitating targeted intervention to restore performance and durability. To address these challenges, an integrated rehabilitation strategy was developed, incorporating structural repairs, strengthening through carbon fiber-reinforced polymer (CFRP), and advanced waterproofing techniques. The adopted approach involved enlarging load-bearing components and applying CFRP to enhance flexural strength while minimizing aesthetic alterations. Experimental findings demonstrated that CFRP reinforcement increased slab flexural strength by 30% and reduced crack widths by 23%, effectively mitigating corrosion-related deterioration and extending service life. Furthermore, micro-concrete was utilized in all enlargement locations in compliance with ACI standards, ensuring long-term durability. The proposed rehabilitation framework offers a sustainable solution for extending the service life of PT structures exposed to aggressive environmental conditions. By addressing both immediate structural deficiencies and underlying degradation mechanisms, the strategy enhances resilience and reduces future maintenance requirements. The integration of CFRP strengthening, epoxy crack injection, and advanced waterproofing measures significantly improves corrosion resistance and structural longevity.
Co-Authors Al-Ateyat, Aroob Al-Sadoon, Zaid A. Alsuwaidi, Hadif Altoubat, Salah Awad, Raghad Barakat, Samer Barakat, Samer A. Habib, Ahed Maalej, Mohamed Metawa, Abdulrahman Nassif, Nadia