Experimental and numerical investigation of one-way reinforced concrete slabs using various strengthening systems

El-Mandouh, Mahmoud A.; Elsamak, Galal; Abdelazeem, Fathi; Hamoda, Ahmed; Rageh, Basem O.

doi:10.1016/j.cscm.2022.e01691

Cited by 8 publications

(5 citation statements)

References 25 publications

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“…After 10 years of service, the deterioration of the bottom of the RC deck did not significantly progress, primarily because the UHPC surface layer prevented the infiltration of environmental factors attacking this region. The effectiveness of UHPC overlays has been confirmed in several studies by authors such as Hoang [7], Liu [8] and El-Mandouh [9]. Fiber-Reinforced Polymer (FRP) sheets are commonly used for the repair and strengthening of steel-reinforced concrete structures [1].…”

Section: Introductionmentioning

confidence: 88%

Rehabilitation of reinforced concrete slab using ultra high-performance concrete and fiber reinforced polymer

Hoang Viet,

Nguyen Hoang

2024

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Rehabilitation the flexural capacity of reinforced concrete structures has been the subject of many studies. However, there is currently limited research on repairing such structures using Ultra-High-Performance Concrete (UHPC) and the combination of UHPC with Fiber-Reinforced Polymer (FRP) materials. This article presents the results of an experimental study on the flexural behavior of 4 specimens: 1 specimen of reinforced concrete (RC), 1 specimen strengthened with FRP sheets, and 02 specimens with the same height as the RC specimen but with a replacement of 3 cm of the protective concrete layer with a UHPC layer, either bonded or not bonded to the existing concrete, with or without the reinforcement of FRP sheets. The experimental results of the 4-point bending tests indicate that, while maintaining the height of the RC specimen constant, replacing the protective concrete layer with a UHPC layer and incorporating FRP in the tension zone led to an increase of approximately 83.35% in flexural capacity, with the deflection at the failure stage rising by only 12.8%. This research opens up a new and promising direction for improving and extending the service life of RC bridges using UHPC and FRP

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Section: Introductionmentioning

confidence: 88%

Rehabilitation of reinforced concrete slab using ultra high-performance concrete and fiber reinforced polymer

Hoang Viet,

Nguyen Hoang

2024

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“…Hiện tại chưa có nhiều nghiên cứu đánh giá ảnh hưởng sự có mặt của lớp UHPC trên bản BTCT nhằm đánh giá hiệu quả của vật liệu mới này ứng dụng trong việc sử chữa bản BTCT. Một số nghiên cứu trên thế giới chủ yếu tập trung vào đánh giá sự ảnh hưởng của lớp UHPC ở vùng chịu kéo [9][10][11][12].…”

Section: đặT Vấn đềunclassified

Thực nghiệm ứng xử chịu uốn bản bê tông cốt thép được tăng cường bê tông siêu tính năng (UHPC)

Hoàng Việt

2023

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Sửa chữa và tăng cường kết cấu mặt cầu bê tông cốt thép đang là đối tượng của nhiều nghiên cứu, tuy nhiên hiện nay chưa có nhiều nghiên cứu về sửa chữa kết cấu này bằng vật liệu bê tông cường độ siêu cao (UHPC). Bài báo trình bày kết quả nghiên cứu thực nghiệm ứng xử chịu uốn của 03 mẫu bản: 01 mẫu bản bê tông cốt thép (BTCT), 02 mẫu cùng chiều cao với mẫu BTCT có thay thế 03 cm lớp bê tông bảo vệ bằng lớp UHPC neo liên kết hoặc không với bản bê tông hiện hữu. Kết quả thí nghiệm uốn 04 điểm cho thấy việc tăng cường UHPC ở lớp phủ bê tông bề mặt sẽ tăng độ võng tới hạn lên 133%, mô men uốn phá hoại so với mẫu đối chứng lên 31,4% đồng thời làm thay đổi đặc điểm phá hoại của mẫu. Đối với mẫu không có liên hết với bản bê tông hiện hữu, mẫu bị phá hoại với mô men uốn nhỏ hơn và xuất hiện hiện tượng bong tách 02 lớp này. Nghiên cứu này đã mở ra một hướng nghiên cứu mới và tiềm năng cho việc cải thiện và gia tăng tuổi thọ của cầu bê tông cốt thép sử dụng UHPC

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“…Numerical models were also developed by researchers to study the behavior of RC members. [11][12][13][14][15][16][17] Hamoda et al 14,15 developed finite element models (FEM) to study the flexural and shear behavior of RC beams strengthened with engineered cementitious composite and stainless-steel strips. Rageh et al 12 developed FEM of RC beams strengthened with glass fiber reinforcement polymer subjected to flexural load.…”

Section: Introductionmentioning

confidence: 99%

“…Numerical models were also developed by researchers to study the behavior of RC members 11–17 . Hamoda et al 14,15 developed finite element models (FEM) to study the flexural and shear behavior of RC beams strengthened with engineered cementitious composite and stainless‐steel strips.…”

Section: Introductionmentioning

confidence: 99%

Tests and finite element modeling of concrete beams reinforced with reused steel bars

Attia,

Abdelsalam,

Eita

et al. 2023

Structural Concrete

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This paper presents the experimental study and finite element modeling of the flexural behavior of concrete beams reinforced with reused steel bars as longitudinal reinforcements. The experimental program and results of eight reinforced concrete (RC) beams constructed with and without reused steel bars are described in detail. The replacement percentages of brand‐new bars with reused steel bars in the tested beams were 50% and 100%. The reused steel bars were coated with and without epoxy. Steel fibers with fractions of 0.5% and 1.0% of the concrete volume were added to the concrete mixes. The load‐deflection relationship, ductility index, toughness, and failure modes of the tested beams are presented and discussed. It is shown that utilizing reused steel bars decreases the ultimate load of RC beams but increases their deflection at the ultimate load compared with the control beam. Increasing the steel fiber ratio increases the ultimate load and the deflection at the ultimate load of RC beams incorporating reused steel bars. However, the zinc‐rich epoxy used to coat the reused steel bars does not affect the behavior of the beams. Three‐dimensional nonlinear finite element (FE) models of the tested beams were developed using ABAQUS and validated against the test results. The developed FE models are capable of accurately simulating the experimentally observed behavior of RC beams with reused steel bars.

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Experimental and numerical investigation of one-way reinforced concrete slabs using various strengthening systems

Cited by 8 publications

References 25 publications

Rehabilitation of reinforced concrete slab using ultra high-performance concrete and fiber reinforced polymer

Rehabilitation of reinforced concrete slab using ultra high-performance concrete and fiber reinforced polymer

Thực nghiệm ứng xử chịu uốn bản bê tông cốt thép được tăng cường bê tông siêu tính năng (UHPC)

Tests and finite element modeling of concrete beams reinforced with reused steel bars

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