scholarly journals Behavior of One-Way Concrete Slabs Reinforced with GFRP Bars

2012 ◽  
Vol 11 (2) ◽  
pp. 351-358 ◽  
Author(s):  
Kugkwan Chang ◽  
Daewon Seo
Keyword(s):  
Concrete Slabs ◽  
Gfrp Bars

Testing of Large-Scale Two-Way Concrete Slabs Reinforced with GFRP Bars

2011 ◽  
pp. 287-291 ◽  
Author(s):  
C. Dulude ◽  
E. Ahmed ◽  
S. El-Gamal ◽  
B. Benmokrane
Keyword(s):  
Large Scale ◽  
Concrete Slabs ◽  
Gfrp Bars

Numerical simulation of one-way concrete slabs reinforced with glass fiber reinforced polymer bars under service temperatures

2018 ◽  
Vol 45 (10) ◽  
pp. 878-888
Author(s):  
Samia Lardjane ◽  
Hizia Bellakehal ◽  
Ali Zaidi ◽  
Radhouane Masmoudi
Keyword(s):  
Numerical Model ◽  
Concrete Cover ◽  
Fiber Reinforced Polymer ◽  
Concrete Slabs ◽  
Thermal Loads ◽  
Gfrp Bars ◽  
Reinforced Polymer ◽  
Splitting Failure ◽  
Frp Bar ◽  
Concrete Interface

The thermal incompatibility between fiber reinforced polymer (FRP) bars and concrete may cause splitting cracks within the concrete and, eventually, the deterioration of the bond between the FRP bar and the concrete. This paper presents a numerical study using ADINA finite elements software to investigate the thermal behavior of actual one-way concrete slabs reinforced with glass FRP (GFRP) bars varying the ratio of concrete cover thickness to FRP bar diameter (c/db) from 1.3 to 2.8. Slabs are submitted to temperature variations varied from −50 to 60 °C. The main results prove that first radial cracks occur in concrete, at the FRP bar – concrete interface, at thermal loads (ΔTcr) varied between 15 °C and 30 °C. While, the circumferential cracks appear within concrete, at FRP bar – concrete interface, at ΔTcr varied between −15 °C and −35 °C depending of the ratio c/db (1.3 to 2.8) and the tensile strength of concrete fct (1.9 to 2.9 MPa). These numerical thermal loading values are relatively in good agreement with those predicted from the analytical model. The numerical model shows that there is no failure of the concrete cover for low temperatures for slabs having c/db = 1.3 to 2.8 and fct = 1.9 to 2.9 MPa. Nevertheless, for high temperatures, the splitting failure of concrete cover is produced at thermal loads ΔTsp′ varied from 30 °C to 59 °C. While, for concrete situated between GFRP bars, the splitting failure occurred at thermal loads ΔTsp′ equal to 46 °C. Thermal stresses and strains, and also cracking thermal loads predicted from the numerical model are compared with those obtained from analytical models and experimental tests.

scholarly journals Structural Behavior of High-Strength Concrete Slabs Reinforced with GFRP Bars

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2997
Author(s):  
Maher A. Adam ◽  
Abeer M. Erfan ◽  
Fatma A. Habib ◽  
Taha A. El-Sayed
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
High Strength Concrete ◽  
High Strength ◽  
Element Model ◽  
Experimental Results ◽  
Structural Behavior ◽  
Concrete Slabs ◽  
Strength Concrete ◽  
Gfrp Bars

In this manuscript, structural testing was conducted on high-strength concrete slab specimens to investigate the behavior of such specimens when reinforced with a locally produced GFRP reinforcement. Subsequently, a finite element model (FEM) was constructed and validated against the experimental results. In the experimental phase, a total of eleven specimens (nine were reinforced with GFRP, while two were reinforced with conventional steel) were constructed and tested. The slabs dimensions are 700 mm × 1750 mm with variable thickness from 100 mm to 150 mm and different reinforcement ratios using different diameters. The structural behavior of the tested slabs was investigated in terms of ultimate load, ultimate deflection, load–deflection relationship, and crack pattern. Additionally, a nonlinear finite element model using the software ANSYS 2019-R1 was constructed to simulate the structural behavior of slabs reinforced with GFRP bars. The results obtained from the finite element analysis are compared with experimental results. The outcomes showed that the contribution of GFRP rebars in concrete slabs improved slab ductility and exhibited higher deflection when compared with traditional steel rebars. Good agreement between experimental and nonlinear analysis was obtained.

scholarly journals Experimental and Numerical Study of Early-age Cracking of Concrete Slabs Reinforced with Steel and GFRP Bars

2021 ◽  
Vol 19 (12) ◽  
pp. 1197-1211
Author(s):  
Robert Sonnenschein ◽  
Natalia Gazovicova ◽  
Juraj Bilcik
Keyword(s):  
Numerical Study ◽  
Concrete Slabs ◽  
Early Age ◽  
Gfrp Bars

Flexural Behaviors of Concrete Slab Reinforced with GFRP Bars

2011 ◽  
Vol 243-249 ◽  
pp. 567-572
Author(s):  
Hao Sheng Gu ◽  
Da Yu Zhu
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
Concrete Slab ◽  
Reinforcement Ratio ◽  
Parameter Analysis ◽  
Concrete Slabs ◽  
Test Results ◽  
Gfrp Bars ◽  
Reinforced Concrete Slabs ◽  
Steel Bars

This paper attempts to reveal the flexural behaviors of concrete slab reinforced with GFRP bars. Through flexural test, the deformation process and failure mode of concrete slabs reinforced with GFRP bars and steel bars are examined, respectively. The deflection, cracking load, ultimate load and concrete strain are compared between two kinds of concrete slabs. From the test results, it is clarified that the moment-deflection curve of GFRP reinforced concrete slab can be divided into two stages. Before concrete cracks the behaviors of two kinds of concrete slabs are almost the same. However, the deflection of concrete slabs reinforced with GFRP bars increases much faster after cracking and the stress-strain diagram is linear up to rupture with no discernible yield point. The ultimate load of concrete slabs reinforced with GFRP bars is 1.2 times of that of concrete slabs reinforced with steel bars. Based on the test results, finite element analysis is performed in order to study the influence of reinforcement ratio. Parameter analysis shows that the flexural rigidity of GFRP reinforced concrete slabs increases with the reinforcement ratio after cracking.

scholarly journals Punching Shear Behavior of Two-Way Concrete Slabs Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) Bars

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 893 ◽  
Author(s):  
Minkwan Ju ◽  
Kyoungsoo Park ◽  
Cheolwoo Park
Keyword(s):  
Shear Strength ◽  
Glass Fiber ◽  
Fiber Reinforced Polymer ◽  
Punching Shear ◽  
Concrete Slabs ◽  
Rc Beam ◽  
Glass Fiber Reinforced Polymer ◽  
Gfrp Bars ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced

This study investigated the punching shear behavior of full-scale, two-way concrete slabs reinforced with glass fiber reinforced polymer (GFRP) bars, which are known as noncorrosive reinforcement. The relatively low modulus of elasticity of GFRP bars affects the large deflection of flexural members, however, applying these to two-way concrete slabs can compensate the weakness of the flexural stiffness due to an arching action with supporting girders. The test results demonstrated that the two-way concrete slabs with GFRP bars satisfied the allowable deflection and crack width under the service load specified by the design specification even in the state of the minimum reinforcement ratio. Previous predicting equations and design equations largely overestimated the measured punching shear strength when the slab was supported by reinforced concrete (RC) girders. The strength difference can be explained by the fact that the flexural behavior of the supporting RC beam girders reduces the punching shear strength because of the additional deflection of RC beam girders. Therefore, for more realistic estimations of the punching shear strength of two-way concrete slabs with GFRP bars, the boundary conditions of the concrete slabs should be carefully considered. This is because the stiffness degradation of supporting RC beam girders may influence the punching shear strength.

scholarly journals Performance Evaluation of One-Way Concrete Slabs Reinforced with New Developed GFRP Bars

2015 ◽  
Vol 06 (05) ◽  
pp. 420-435 ◽  
Author(s):  
Ahmed H. Ali ◽  
Mohammad Z. Afifi ◽  
Bahira Abdulsalam ◽  
Hesham Haggag ◽  
Awad El Hashimy ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Concrete Slabs ◽  
Gfrp Bars

scholarly journals Flexural behaviour of concrete slabs reinforced with GFRP bars and hollow composite reinforcing systems

2020 ◽  
Vol 236 ◽  
pp. 111836 ◽  
Author(s):  
Mohammed Al-Rubaye ◽  
Allan Manalo ◽  
Omar Alajarmeh ◽  
Wahid Ferdous ◽  
Weena Lokuge ◽  
...  
Keyword(s):  
Concrete Slabs ◽  
Flexural Behaviour ◽  
Gfrp Bars
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