Influence of Polyurea Coatings on Low-Longitudinal-Reinforcement-Ratio Reinforced Concrete Beams Subjected to Bending

Szafran, Jacek; Matusiak, Artur; Rzeszut, Katarzyna; Jankowiak, Iwona

doi:10.3390/ma15072652

Cited by 3 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3. More details and descriptions of each phase of the polyurea application process are shown in [34]. The main elements of the test stand included the main steel frame, the steel frame for supporting the RC beams, the steel frame for supporting the strain sensors, the hydraulic piston, the hydraulic pump and the workstation.…”

Section: Reinforcing Concrete Beamsmentioning

confidence: 99%

“…The main elements of the test stand included the main steel frame, the steel frame for supporting the RC beams, the steel frame for supporting the strain sensors, the hydraulic piston, the hydraulic pump and the workstation. More information is available in the authors' previous paper [34].…”

Section: Reinforcing Concrete Beamsmentioning

confidence: 99%

“…In contrast to numerous studies on the properties of polyurea coatings, only a few articles that focus on the use of this coating to improve the properties of structural components can be found in the literature. Articles [27][28][29][30][31][32][33][34] show the results of studies on the effect of polyurea applications on the performance properties of chosen components used in the construction industry (such as concrete rings, wooden connections, steel plates, water pipes and RC beams).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of a polyurea coating on bent reinforced concrete beams with various reinforcement ratios

Szafran,

Matusiak,

Rzeszut

et al. 2023

Bulletin of the Polish Academy of Sciences Technical Sciences

View full text Add to dashboard Cite

Polyurea coatings as a possible structural reinforcement system" is a research project aimed at exploring possible applications of polyurea coatings for improving structural performance (including steel, concrete, wooden and other structures used in the construction industry). As part of the project, this paper focuses on evaluating the performance of bent reinforced concrete (RC) beams covered with a polyurea coating system. Easy polyurea application and its numerous advantages can prove very useful when existing RC structural elements are repaired or retrofitted. Laboratory tests of three types of RC beams with three different longitudinal reinforcement ratios were performed for the purposes of this paper. The tests were designed to determine the bending strength, performance and cracking patterns of the coated RC beams. In addition, a theoretical model was developed to predict the impact of the polyurea coating on the bending strength of the RC beams. On this basis, the effect of the coating on the bending strength and the performance of the coated beams at the ultimate limit state (ULS) was examined and analyzed. The results showed that the use of the polyurea coating has a positive impact on the cracking state of the RC beams subject to bending and little effect on their bending strength

show abstract

Section: Reinforcing Concrete Beamsmentioning

confidence: 99%

Section: Reinforcing Concrete Beamsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The influence of a polyurea coating on bent reinforced concrete beams with various reinforcement ratios

Szafran,

Matusiak,

Rzeszut

et al. 2023

Bulletin of the Polish Academy of Sciences Technical Sciences

View full text Add to dashboard Cite

show abstract

Impact Response of RC Beams Coated with Polyurea Layers

Zhang¹,

Jiang²,

Wang³

et al. 2023

Int. J. Str. Stab. Dyn.

View full text Add to dashboard Cite

During the service life of reinforced concrete beams (RC beams), they may experience impact loadings induced by various falling objects, such as falling rocks and fragments of upper floors. Therefore, the RC beam’s impact resistance is important to its application in structures. This paper investigated the impact mitigation performance of polyurea coatings on RC beams by drop weight impact tests with different impact velocities and hammer shapes. According to the test results, the polyurea coatings can significantly reduce the RC beams’ local damage and midspan displacement. Moreover, it was found that the RC beams’ plateau impact forces were notably increased by the polyurea coatings. Besides, comparisons between impact tests with different impact loads indicated that the polyurea coatings’ protection effect was not noticeably influenced by the hammer shape or impact velocity. Based on the test results, a numerical model was established and validated, and the model was used to study the mechanism and the parameter influence of polyurea coatings. By simulating the response of upper- and lower-side coated beams, it was revealed that the polyurea coating reduced the RC beam’s overall damage by reducing its local damage and increasing its bending moment. Parametric studies showed that the mitigation effect increased with coating thickness and the increase rate decreased with the thickness. In addition, the effect of longitudinal coating length was also studied via numerical simulation, and it was found that the mitigation effect increased with coating length, and it became nearly identical to that of the fully coated beam when the coating length exceeded 60[Formula: see text]cm.

show abstract

Comparison of Dynamic Vibration Control Techniques by the GFRPU and/or LTMD System

Song

Jang

et al. 2022

Polymers

View full text Add to dashboard Cite

Reinforced concrete (RC) structures with non-seismic reinforcement details are vulnerable to earthquakes. This experimental study evaluates the efficiency of three techniques to alleviate the dynamic responses of existing structures: glass fiber-reinforced polyurea (GFRPU) reinforcement, a lever-typed tuned mass damper (LTMD) system, and a hybrid system of GFRPU and LTMD reinforcements. The lateral-resisting capacity and ductility of the GFRPU reinforcement specimen were enhanced by the material characteristics, and the dynamic responses were alleviated. The LTMD control specimen controlled the dynamic responses by the passive control system of the tuned mass damper (TMD), and the control forces to sustain its geometric motion were exerted on the specimen. The hybrid system was designed to control the dynamic responses by the GFRPU reinforcement and the LTMD control system. Four specimens, including an unreinforced specimen, were tested under external excitations, including the El Centro earthquake. The vibrations were more controlled in the order of the GFRPU reinforcement specimen, the LTMD control specimen, and the hybrid control specimen. The hybrid system was evaluated as excellent for seismic reinforcement, such as preventing abrupt failure with the lateral-resisting capacity and ductility of GFRPU and improving the dynamic control capacity by LTMD.

show abstract

Influence of Polyurea Coatings on Low-Longitudinal-Reinforcement-Ratio Reinforced Concrete Beams Subjected to Bending

Cited by 3 publications

References 25 publications

The influence of a polyurea coating on bent reinforced concrete beams with various reinforcement ratios

The influence of a polyurea coating on bent reinforced concrete beams with various reinforcement ratios

Impact Response of RC Beams Coated with Polyurea Layers

Comparison of Dynamic Vibration Control Techniques by the GFRPU and/or LTMD System

Contact Info

Product

Resources

About