Experimental fire testing of large‐scale glass fibre‐reinforced polymer ‐reinforced concrete beams with mid‐span straight‐end bar lap splices

2021 ◽  
Author(s):  
Omar Nour ◽  
Osama (Sam) Salem ◽  
Ahmed Mostafa
Keyword(s):  
Glass Fibre ◽  
Large Scale ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fire Testing ◽  
Lap Splices ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

Fibre-reinforced polymer composite shear reinforcement: performance evaluation in concrete beams and code prediction

2010 ◽  
Vol 37 (8) ◽  
pp. 1057-1070 ◽  
Author(s):  
Ehab A. Ahmed ◽  
Ehab F. El-Salakawy ◽  
Brahim Benmokrane
Keyword(s):  
Shear Strength ◽  
Glass Fibre ◽  
Large Scale ◽  
Shear Crack ◽  
Design Strength ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced ◽  
Composite Shear

This paper evaluates the performance of carbon and glass fibre-reinforced polymer (FRP) stirrups and the accuracy of the shear design provisions incorporated in the currently available design codes and guidelines. A total of seven large-scale T-beams were constructed and tested: three reinforced with carbon fibre-reinforced polymer (CFRP) stirrups, three reinforced with glass fibre-reinforced polymer (GFRP) stirrups, and one reinforced with a steel stirrup for comparison, when applicable. The test results revealed that the design strength of the tested beams is not affected by the reduced strength of FRP stirrups at bend locations. Also, the recent CAN/CSA-S6 update is capable of adequately predicting the shear strength of the beam specimens reinforced with FRP stirrups. The software, Response-2000, which is based on the modified compression field theory (MCFT), predicted well the shear strength and the average strain in the stirrups of the tested beams; however, it overestimated the shear crack width.

scholarly journals Evaluation of the behaviour of reinforced concrete beams repaired with glass fibre reinforced polymer (GFRP) using a damage variable

2021 ◽  
Vol 15 (57) ◽  
pp. 82-92
Author(s):  
Rafael Cunha ◽  
Kevin Oliveira ◽  
Antônio Brito ◽  
Camila Vieira ◽  
David Amorim
Keyword(s):  
Glass Fibre ◽  
Control Variable ◽  
Damage Variable ◽  
Reinforced Concrete Beams ◽  
Collapse Mechanism ◽  
Strength Increase ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

The use of fibre reinforced polymers (FRP) for increasing the strength of RC structures became a usual method. FRP presents easy application and demands low space and provide significant strength increase. Usually, the decision for FRP use is made in terms of applied loads and deflections. However, such quantities can vary significantly depending on the characteristics of the structural element e.g. span, effective depth and concrete resistance. Therefore, this paper aims to present an alternative control variable to analyse the behaviour of RC beams repaired with glass fibre reinforced polymer (GFRP), called damage. Such damage variable accounts for concrete cracking and it was experimentally measured before and after the application of GFRP. Note that the application of GFRP increased the ultimate load for all repaired beams. The damage values of such beams also increased when collapse was reached. Furthermore, it was observed that the collapse mechanism shifted to shear and did not occurred the failure of the GFRP.

scholarly journals Experimental and Theoretical Investigation of Glass Fibre Reinforced Polymer Tension Lap Splices in Ultra High Performance Concrete

2021 ◽  
Author(s):  
Chratien Mak
Keyword(s):  
Glass Fibre ◽  
High Performance ◽  
High Performance Concrete ◽  
Lap Joints ◽  
Ultra High Performance Concrete ◽  
Lap Splices ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

Glass fibre reinforced polymer (GFRP) reinforcements are a viable replacement for corroding steel rebars. GFRP rebar tension lap splices combined with ultra high performance concrete (UHPC) can improve the efficiency of materials and construction in bridge deck construction joints. This thesis investigates the bond performance of high modulus (HM) GFRP rebar splices using UHPC. UHPC slab/beams of 100 -170 MPa concrete having 150 - 300 mm tension splices were tested along with several beams constructed from prefabricated high strength concrete sections with central GFRP spliced UHPC joints. Theoretical analysis was also conducted to evaluate critical splice lengths. Based on comparisons with code design values, recommendations are made on potential failure modes and minimum splice lengths. The serviceability, fatigue, and environmental performance of GFRP in UHPC are also considered. Recommendations from this research will improve the safety and efficiency of GFRP tension lap joints used in bridge decks and other construction

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