Comparison between strengthening of reinforced concrete beams using steel plates and double FRCM layers

Khouzam, Dalia; El-Nemr, Amr; Khattab, Enas A.; Hanna, Nagy F.

doi:10.1201/9780429426506-386

Cited by 2 publications

(1 citation statement)

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“…Aykaç et al [17] conducted the reinforcement and testing of reinforced concrete T−section beams and performed flexural and flexural shear reinforcements on the test beams, respectively, and the results showed that the strength of the reinforced beams increased about 2.5 times; however, the test beams still had good ductility. Since the use of bonded steel strengthening technology to improve reinforced concrete beams' flexural bearing capacity was proposed by scholars since the middle of the last century (Khouzam et al [18]; Thamrin and Sari [19]; Alwis et al [20]; Rakgate et al [21]), it can be inferred that the impact resistance of reinforced concrete beams can also be improved through this technology. The impact resistance of partially precast concrete beams strengthened with bonded steel plates was investigated.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates

Yan,

Zheng,

Lin

et al. 2023

Applied Sciences

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A structure may be exposed to a range of unexpected loads throughout its full life cycle. Partially precast concrete (PC) beams refer to the process of manufacturing concrete beams in which one part of the component is pre−fabricated in a factory and the other part is completed at the construction site. Through the test, it is possible to better ensure the safety and dependability of the PC composite beams under impact load by examining the reinforcement effect, structural toughness, and damage mode of PC composite beams with bonded steel. Additionally, a scientific basis and practical guidance are provided for the actual project. Their impact resistance can significantly affect the overall safety of a structure when subjected to an impact load. Three of the four PC beams used in this investigation were strengthened with steel plates. Residual flexural bearing capacity tests and drop weight impact tests were then conducted. The impacts of steel plate thickness and U−shaped steel plate hoops on the failure mechanism and dynamic response of the component were investigated. The dynamic responses obtained from the experiments included the displacement–time history curve, impact force, and support reaction force. In order to explore the failure mechanism of the partially precast beam during the impact process, a staged analysis was conducted based on the failure mode and dynamic response characteristic values of each curve. Residual flexural bearing capacity tests were used to examine the residual flexural bearing capacity of PC beams strengthened with bonded steel plates. The results of the research reveal that the failure mechanisms of each test beam are bending–shear failures. With the increase in bonded steel thickness, the peak mid−span displacement reduced by 6.55%, the residual mid−span displacement decreased by 29.53%, and the residual flexural bearing capacity improved by 25.02%. With the adoption of U−shaped steel plate hoops, the residual flexural bearing capacity significantly increased while the peak mid−span and residual mid−span displacements both decreased.

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Section: Introductionmentioning

confidence: 99%

Experimental Research on the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates

Yan,

Zheng,

Lin

et al. 2023

Applied Sciences

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Influence of retrofitting in the seismic behaviour of precast reinforced concrete industrial buildings

Ostetto,

Batalha,

Sousa

et al. 2024

Innov. Infrastruct. Solut.

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Previous destructive earthquakes caused large economic losses as well as human losses. Seismic risk studies are of paramount importance to predict the impact of future earthquakes and support seismic risk mitigation policies. The present study presents a seismic risk assessment based on the cost and direct loss assessment of precast industrial buildings with different retrofitting levels in terms of horizontal strength. In this evaluation, a comparative analysis between the configurations of retrofitted buildings and the original building is performed. The effects of retrofitting solution strategies are first investigated in a single building. Then a study is carried out to assess which retrofit solutions level are most appropriate depending on the exposure and seismic risk. The results showed the use of bracing in the PRC building can improve seismic behaviour, with significant increases in horizontal strength. The cost of intervention is reduced, with a slight increase of less than 1% to almost 2% of the cost of the structure. From the derivation of seismic fragility functions for different retrofitting solutions level, the seismic risk analysis with dozens of existing PRC industrial buildings in Portugal points to a large reduction in economic losses as from retrofitted buildings, like an improvement of the seismic capacity of the buildings attributed to the retrofit systems considered. In general, among the different types of retrofit studied, there is an increase in the reduction of total economic losses, namely 49% when retrofitted with a 50% increase in horizontal strength, 58% when retrofitted with a 75% increase in horizontal strength and 64% for retrofitted with 100%.

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Comparison between strengthening of reinforced concrete beams using steel plates and double FRCM layers

Cited by 2 publications

References 0 publications

Experimental Research on the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates

Experimental Research on the Impact Resistance of Partially Precast Concrete Beams Strengthened with Bonded Steel Plates

Influence of retrofitting in the seismic behaviour of precast reinforced concrete industrial buildings

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