Experimental investigation on seismic retrofit of gravity railway bridge pier with CFRP and steel materials

Chen, Xingchong; Ding, Mingmin; Zhang, Xiyin; Liu, Zunwen; Ma, Huajun

doi:10.1016/j.conbuildmat.2018.06.102

Cited by 27 publications

(7 citation statements)

References 30 publications

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“…Therefore, to maintain the function of RC buildings, structural safety should be checked periodically, and retrofitting methods that can enhance the strength and ductility of existing structures should be applied. The most common retrofitting method of RC structures is steel jacketing to confine the concrete columns or beams [1][2][3]. However, there are difficulties in retrofitting beams using steel jacketing such as lifting the steel plates.…”

Section: Introductionmentioning

confidence: 99%

Shear Behavior of Reinforced Concrete Beam Retrofitted with Modularized Steel Plates

Kim

Lee

2023

Materials

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This paper presents the results of a shear test on a reinforced concrete beam retrofitted with modularized steel plates. A total of five retrofitted concrete beams with various span-depth ratios as a variable were fabricated and tested. A companion beam without retrofitting was used as the control specimen. The results of this experiment confirmed that the method proposed in this study improved the shear performance by approximately 1.8 times compared with the non-retrofitted reinforced concrete beam. The test results indicate that the shear retrofitting method using modularized steel plates can be effective in retrofitting the concrete beams, resulting in improvement in the strength, stiffness and deformations.

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Section: Introductionmentioning

confidence: 99%

Shear Behavior of Reinforced Concrete Beam Retrofitted with Modularized Steel Plates

Kim

Lee

2023

Materials

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“…Carbon fiber-reinforced polymer (CFRP) jackets, which have light weight and high strength, are an effective strengthened method to confine the core concrete and preventing the steel bars from buckling in RC structures. A series of test results indicated that the CFRP-strengthened bridge columns achieved larger lateral capacity, flexural ductility and energy dissipation [ 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Seismic Behavior of Seismic-Damaged Double-Deck Viaduct Frame Pier Strengthened with CFRP and Enveloped Steel

Liu

et al. 2022

Materials

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This paper investigates the seismic behavior of a seismic-damaged double-deck viaduct frame pier (DVFP) strengthened with CFRP and enveloped steel, four strengthened DVFP specimens with different degrees of initial damage were tested under quasi-static cyclic loading. Based on the test results, the hysteretic behavior, the stiffness and strength degradation, crack propagation, and failure mechanism were firstly analyzed. Then, the damage indexes of the tested specimens were calculated with different models to evaluate the seismic strengthening performance. Results of this study show that CFRP and enveloped steel strengthening could effectively improve the strength and ductility of pre-damaged DVFPs. The ultimate load, the failure displacement and the displacement ductility of the moderately damaged specimen after being strengthened were found to increase by 120.74%, 35% and 32.33%, respectively. For the severely damaged specimens with CFRP and enveloped steel strengthening, the figures were 105.36%, 25.98% and 31.41%, respectively. The research results can provide reference for the hybrid strengthening application of seismic-damaged DVFP.

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“…CFRP can effectively extend the ductility and bearing capacity of the concrete structures [11][12][13]. Seismic behavior of gravity railway bridge pier strengthened with CFRP was studied [14]. It was found that the load-carrying capacity of the bridge pier can be enhanced by the CFRP wrapping method, and this strengthening method can be applied to improve the vulnerability of gravity bridge pier at the pierfooting region.…”

Section: Introductionmentioning

confidence: 99%

“…where l is the span of beam, a is the distance between the loading point and the support, and B is the section stiffness which can be obtained by using the equations (14) and (20). e comparison of deflection between the theoretical value calculated, simulation results in the previous study [25], and experimental values is shown in Figure 19.…”

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confidence: 96%

Flexure Performance of Externally Bonded CFRP Plates-Strengthened Reinforced Concrete Members

Yuan

Zhu

Zheng³

et al. 2020

Mathematical Problems in Engineering

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This paper investigates the flexural behavior of CFRP plate-strengthened concrete structures. Specimens of the CFRP plate-reinforced beam were designed and tested by the four-point flexural test. The load-deflection relationship, failure modes, and crack propagation were analyzed. The results showed that the postcracking stiffness and bearing capacity of the test beams can be improved by the additional anchoring measures for CFRP strengthening. The relationship between flexural moment and curvature was analyzed by introducing a MATLAB program. The calculation model between curvature, flexural moment, and stiffness was derived for the CFRP plate-strengthened structure. The recommended calculation model was applied in the analysis of deflection, and the theoretical values were compared with the test results.

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Experimental investigation on seismic retrofit of gravity railway bridge pier with CFRP and steel materials

Cited by 27 publications

References 30 publications

Shear Behavior of Reinforced Concrete Beam Retrofitted with Modularized Steel Plates

Shear Behavior of Reinforced Concrete Beam Retrofitted with Modularized Steel Plates

Experimental Research on Seismic Behavior of Seismic-Damaged Double-Deck Viaduct Frame Pier Strengthened with CFRP and Enveloped Steel

Flexure Performance of Externally Bonded CFRP Plates-Strengthened Reinforced Concrete Members

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