Related Experiment Video
Updated: Oct 20, 2025
11:07
Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
Published on: June 27, 2018
11.3K
Structural Behavior of High-Strength Concrete Slabs Reinforced with GFRP Bars
Maher A Adam1, Abeer M Erfan1, Fatma A Habib1
1Department of Structural Engineering, Reinforced Concrete Structures, Shoubra Faculty of Engineering, Benha University, 108 Shoubra St., Shoubra, Cairo 11629, Egypt.
Polymers
|September 10, 2021
Summary
This study tested concrete slabs reinforced with Glass Fiber Reinforced Polymer (GFRP) bars, finding they offer improved ductility and deflection compared to steel reinforcement. A validated finite element model confirmed these experimental results.
Area of Science:
- Civil Engineering
- Materials Science
- Structural Engineering
Background:
- High-strength concrete slabs are critical structural elements.
- Investigating alternative reinforcement materials like Glass Fiber Reinforced Polymer (GFRP) is essential for enhancing concrete structures.
- Understanding the structural behavior of GFRP-reinforced concrete is crucial for its wider adoption.
Purpose of the Study:
- To evaluate the structural performance of high-strength concrete slabs reinforced with locally produced GFRP bars.
- To compare the behavior of GFRP-reinforced slabs with those using conventional steel reinforcement.
- To develop and validate a finite element model (FEM) simulating GFRP-reinforced concrete slabs.
Main Methods:
- Experimental testing of eleven concrete slab specimens (nine GFRP-reinforced, two steel-reinforced).
- Slab dimensions: 700 mm × 1750 mm, thickness 100-150 mm, varying reinforcement ratios and diameters.
- Nonlinear finite element analysis using ANSYS 2019-R1, validated against experimental data.
Main Results:
- GFRP reinforcement enhanced concrete slab ductility and increased ultimate deflection compared to steel.
- Structural behavior was analyzed through ultimate load, deflection, load-deflection curves, and crack patterns.
- FEM simulations showed good agreement with experimental findings, validating the model's accuracy.
Conclusions:
- GFRP bars are a viable alternative to steel reinforcement in concrete slabs, offering improved ductility.
- The developed FEM accurately predicts the structural behavior of GFRP-reinforced concrete slabs.
- This research supports the use of GFRP in construction for enhanced structural performance.
Related Concept Videos
01:25Reinforcements in Concrete
236
Reinforced concrete is a composite material used extensively in construction, combining the compressive strength of concrete with the tensile strength of steel. This synergy is essential as concrete, while excellent at resisting compression, is weak under tension. Steel bars, or rebars, are embedded in the concrete to handle these tensile forces. The choice of steel is strategic; it shares a similar coefficient of thermal expansion with concrete, which ensures uniformity in response to...
236
01:22Fiber Reinforced Concrete
168
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
168
01:22Design Example: Distributing Reinforcements in Concrete Sections
156
The topic explores the practical aspects of adjusting steel reinforcements within a concrete beam section to meet specific design requirements. When designing a reinforced concrete beam, it is essential to distribute the steel reinforcements properly to ensure structural integrity and efficiency. The example provided details a scenario where a beam requires a total steel cross-section of 4 square inches. The engineer identifies that the available steel bars have a nominal diameter of 1.693...
156
01:16Tensile Strength Considerations of Concrete
244
Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
The dimensions and shape of a concrete specimen...
The dimensions and shape of a concrete specimen...
244
01:23Behavior of Concrete Under Compressive Load
336
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
336
01:15Reinforced Brick Masonry
1.3K
Reinforced brick masonry is an advanced construction technique that enhances the structural integrity of brick walls by incorporating steel reinforcements. These reinforcements are either placed within the hollow cores of bricks or sandwiched between two layers of masonry, known as wythes, and are then secured in place with grout. Grout is a fluid mixture composed of Portland cement, aggregate, and water, providing the necessary bonding agent for the steel and brick.
To fortify brick walls...
To fortify brick walls...
1.3K