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

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 Performance evaluation of concrete slabs of existing bridges using neural networks

2003 ◽  
Vol 25 (12) ◽  
pp. 1455-1477 ◽  
Author(s):  
Kei Kawamura ◽  
Ayaho Miyamoto ◽  
Dan M. Frangopol ◽  
Ryuichi Kimura
Keyword(s):  
Neural Networks ◽  
Performance Evaluation ◽  
Concrete Slabs ◽  
Existing Bridges

Performance Evaluation of Concrete Pavement Slab Considering Creep Effect by Finite Element Analysis

2018 ◽  
Vol 2672 (27) ◽  
pp. 65-77
Author(s):  
Siming Liang ◽  
Ya Wei ◽  
Zehong Wu ◽  
Will Hansen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Performance Evaluation ◽  
Concrete Pavement ◽  
Concrete Slabs ◽  
Total Stress ◽  
Element Analysis ◽  
Creep Effect ◽  
Flexural Creep ◽  
Warping Stress

Creep, as an intrinsic property of concrete material, will inevitably affect the performance of concrete pavement slabs in the field. However, the creep effect on the performances of concrete pavement slabs is far from being fully investigated. In this study, a test set-up is designed to measure the flexural creep of concrete beams exposed to both sealed and drying conditions. The measured flexural creep results are then modeled by the microprestress–solidification theory-based creep model which is incorporated into finite element analysis to evaluate numerically the creep effect on the moisture warping deformation, warping stress, and the total stress under traffic load in concrete slabs. Parameters including slab size, slab thickness, and subgrade modulus are considered. It is found that concrete creep has a significant effect on slab performance. Based on the measured creep properties in this study, the warping deformation of slabs can be reduced by 8–62%, and the warping stress and the total stress can be relaxed by at least 50%. Therefore, it is of importance to incorporate creep effect in analyzing warping deformation and stress generated in concrete pavement slabs. This study also provides a numerical methodology to the current performance evaluation of concrete slabs in the field.

scholarly journals Performance Evaluation System for Concrete Slabs of Existing Bridges

2004 ◽  
Vol 88 (6) ◽  
pp. 150-162
Author(s):  
Ayaho Miyamoto ◽  
Kei Kawamura ◽  
Hideaki Nakamura ◽  
Banfu Yan
Keyword(s):  
Performance Evaluation ◽  
Evaluation System ◽  
Concrete Slabs ◽  
Performance Evaluation System ◽  
Existing Bridges

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.

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