Analysis of FRP bars used as reinforcement in concrete structures

Brózda, Kinga

doi:10.30657/pea.2016.12.01

Cited by 7 publications

(7 citation statements)

References 2 publications

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“…2-Use concrete's compressive strength (20,60) MPa.3-Strengthened B2, B3 with (GFRP, CFRP) NSM U-stirrups. The elastic response of CFRP and GFRP NSM-stirrups was chosen as the basic physical and mechanical properties of FRP reinforcement based on product data sheets and American design criteria [17]. Table 2 shows steel and FRP bar plastic and elastic properties.…”

Section: Parametric Studymentioning

confidence: 99%

Finite element analysis of RC beams strengthened with near-surface mounted reinforcement bars under pure torsion

Ali,

Al-Azzawi

2023

IOP Conf. Ser.: Earth Environ. Sci.

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This study’s primary objective is to investigate the pure torsional behavior of reinforced concrete beams with inadequate resistance to applied loads. The beam needs to be strengthened with a simple and effective technique, the near-surface mounted. This paper was conducted to check the validity and accuracy of experimental results. This numerical study included testing three specimens; one was control beams, while the remaining were strengthened beams with two configurations with NSM closed and U-stirrups steel stirrups and longitudinal NSM bars. Each beam has three variables: Remove NSM longitudinal bars, use concrete’s compressive strength (20,60) MPa, and Strengthen with NSM GFRP and CFRP bars. All beams have a cross-section (300x300 mm), and the length of the beam was constant (2100 mm). The numerical analysis showed close results to those obtained from the experimental work. This convergence was evident in failure and ultimate torque patterns and mechanisms. The ultimate torque increased when strengthening with four faces of NSM closed stirrups and three faces of NSM stirrups (U-shape) at a spacing of 130mm. On the other hand, The increase in compressive strength leads to an increase in the ultimate torque. Lowering compressive strength leads to more ductile behavior with lower ultimate torque. Removing the additional longitudinal reinforcement has a minor effect on behavior. The type of bars, steel, CFRP, and GFRP, have a marginal impact on the behavior with more ductile behavior for the steel reinforcement bar beams.

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Section: Parametric Studymentioning

confidence: 99%

Finite element analysis of RC beams strengthened with near-surface mounted reinforcement bars under pure torsion

Ali,

Al-Azzawi

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Concerning steel reinforcement, the recycling process cannot be done unless the reinforcement is separated from the concrete. In the case of FRP reinforcement, a significant advantage is that concrete can be crushed with the bars inside; consequently, there is no need to remove them [ 5 ]. As an example, the environmental benefits to be gained from precast basalt fiber reinforced polymer (BFRP) reinforced concrete beams are highlighted in [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Analysis of Compressed Concrete Elements Reinforced with FRP Bars

2020

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Although fiber reinforced polymer (FRP) bars have proved their usefulness in the case of reinforced concrete flexural elements, there are still limited data on their performance in such structures under compression. Despite multiple benefits of using FRP bars as the reinforcement in concrete elements, their potential application as main reinforcement in compressed elements is still very controversial, mainly due to the limited amount of published research results. The presented work partly fulfills this knowledge gap. Two series of theoretical analyses—one based on the stress distribution in the cross-section and the second using the finite elements method (FEM)—with reference to the experimental results are presented. The analyses concern basalt FRP, glass FRP, and steel-reinforced concrete elements under axial compression. There are derived calculations of load–displacement relations and stress values in bars. Damage progression was analyzed as well. Main findings are as follows: (1) a good agreement between calculated failure loads and experimental results has been achieved; (2) potential negative influence of FRP reinforcement on the compressive capacity of the reinforced element should not be neglected; (3) nonlinear FEM analysis is useful in predicting the maximum value of load and damage zones; (4) stress values of only about 100 MPa (much lower than their compressive strength value) were obtained in non-metallic bars. The results might be useful for the further establishment of design rules.

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“…The range of mineral additives to concrete has been extended of new types of materials and wastes. On the basis of the subject literature, the following substances are used in the production of concrete mix: volatile ashes, silica fumes, ground blast furnace slag, biofuel ashes (Jura and Ulewicz, 2018;Halbiniak, 2012;Jura and Ulewicz, 2017), and polymers and polymer wastes (Albano, 2009;Mounanga, 2008;Pietrzak and Ulewicz, 2018;Brózda, and Selejdak, 2016;Janecka and Siemiątkowski, 2012). The present article focuses on the quality of concrete, to whose production slag, achieved from wastewater sludge incineration in fluidized-bed furnace in sewage treatment plants, was used.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Adding Slag, Achieved from Wastewater Sludge Incineration in Fluidized-Bed Furnace, on the Quality of Concrete

Pietrzak

2019

Quality Production Improvement - QPI

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Due to a constant increase in generating the amount of sewage waste it is necessary to find an alternative method of its use or disposal. One of such methods can be utilization of sewage sludge in construction materials industry, particularly in concrete technology and other materials based on cement. It allows using waste materials as a passive additive (filler) or also as an active additive (replacement of part of bonding material). The article aims at presenting the analysis of the effect of adding slag, achieved from wastewater sludge incineration in sewage treatment plant, on properties and quality of concrete mix and hardened concrete. Using an experimental method, the researcher designed the composition of the control concrete mix, which was then modified by means of slag. For all concrete mixtures determined – air content with the use of pressure method and consistency measured by the use of concrete slump test. For all concrete series the following tests were conducted: compressive strength of concrete after 7, 28 and 56 days of maturing, frost resistance for 100 cycles of freezing and thawing, water absorption. The use of slag, ground once in the disintegrator, causes a decrease of in compressive strength of concrete samples in relation to the control concrete series as well as bigger decrease in compressive strength after frost resistance test.

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Analysis of FRP bars used as reinforcement in concrete structures

Cited by 7 publications

References 2 publications

Finite element analysis of RC beams strengthened with near-surface mounted reinforcement bars under pure torsion

Finite element analysis of RC beams strengthened with near-surface mounted reinforcement bars under pure torsion

Nonlinear Analysis of Compressed Concrete Elements Reinforced with FRP Bars

The Effect of Adding Slag, Achieved from Wastewater Sludge Incineration in Fluidized-Bed Furnace, on the Quality of Concrete

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