Experimental and Theoretical Investigation on Flexural Behavior of Corroded Steel Beams Strengthened by CFRP Plate

Zhang, Zongxing; Xu, Shanhua; Mu, Luwen; Peng, Shengyuan

doi:10.1007/s12205-020-2140-5

Cited by 10 publications

(4 citation statements)

References 27 publications

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“…Ahn et al [19][20][21] conducted sheer leading tests on steel plate girders with corroded webs, discussed the influence of corrosion on the shear behavior and the shear strength of webs, and also carried out a load test on CFRP-reinforced corroded steel plate beams in order to evaluate the CFRP reinforcement method. Zhang et al [22,23] studied the flexural buckling behavior of corroded H-shaped steel beams using a four-point bending test and proposed an equation for the bending and the buckling resistance of corroded H-shaped steel beams. Moreover, based on the research that is associated with corroded-member reinforcement, bending tests were conducted on five corroded H-shaped steel beams that were bonded with carbon-fiber-reinforced polymer plates in order to study the bending resistance of these beams.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Overall Stability of Corroded H-Shaped Steel Beams

Luo¹,

Fu²,

Zhang³

et al. 2022

Buildings

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The degradation of the overall stability of corroded rolled H-shaped steel beams under bending conditions has not been extensively studied. In the present study, monotonic tensile tests and overall stability tests were conducted on seven rolled H-shaped steel beams that were subjected to electrochemical corrosion in order to discuss the influence of corrosion on the material’s mechanical properties and the overall stability of steel beams under bending conditions. The test results have indicated that the strength, the elastic modulus, and the elongation of the steel declined with an increase in the corrosion rate of the steel beams, and an obvious plastic deterioration phenomenon was observed. In addition, all of the steel beams with different degrees of corrosion were subjected to overall flexural–torsional buckling failure. The stiffness and the overall stability ultimate bearing capacity of the corroded steel beams decreased with the increase in the corrosion rate, and the overall stability of the test beams with a high design corrosion rate degraded significantly. Furthermore, by using the finite element numerical simulation analysis software ABAQUS, a double-reduction corrosion model of the sectional dimensions and the material’s mechanical properties was established. The overall stability ultimate bearing capacities of the steel beams that were subjected to three-point bending and the corresponding load–lateral displacement curves were analyzed. In addition, the finite element numerical simulation results were compared with the test results for verification. Subsequently, the influence of the initial bending on the overall stability ultimate bearing capacity of the steel beams was analyzed by virtue of the verified finite element model. This study will provide a test basis for the evaluation of the bearing capacity of existing rolled H-shaped steel members, as well as an experimental basis and finite element model reference for the follow-up study on the degradation of the mechanical properties of the corroded rolled steel members.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Overall Stability of Corroded H-Shaped Steel Beams

Luo¹,

Fu²,

Zhang³

et al. 2022

Buildings

View full text Add to dashboard Cite

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“…The effect of reinforcement ratio on flexural performance has also been studied. [18][19][20][21][22] Test results demonstrated that the load resistance and deflection of ECC beams at the yielding of the tensile reinforcement were effectively improved by the increase of reinforcement ratio. However, the ultimate resistance and deformation capacity varied, depending mainly on the reinforcement ratio of beams.…”

Section: Introductionmentioning

confidence: 99%

“…As for reinforced ECC flexural members, a large number of experimental tests have been conducted to determine the load resistance and deformation. The effect of reinforcement ratio on flexural performance has also been studied 18–22 . Test results demonstrated that the load resistance and deflection of ECC beams at the yielding of the tensile reinforcement were effectively improved by the increase of reinforcement ratio.…”

Section: Introductionmentioning

confidence: 99%

“…Finite element models have also been developed to predict the flexural behavior of ECC beams. 11,[23][24] Parra-Montesinos and Chompreda, 25 Zhang et al 21 and Zhang et al 26 investigated the effect of fiber content on flexural capacity of beams. Test results showed that the flexural resistance of ECC beams increased with the increasing of fiber volume fraction when the fraction was less than 2.0%.…”

Section: Introductionmentioning

confidence: 99%

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Experimental tests and analytical model for reinforced polyvinyl alcohol‐engineered cementitious composite beams in bending

Wang

Qin

et al. 2022

Structural Concrete

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Polyvinyl alcohol‐engineered cementitious composite (PVA‐ECC) exhibits strain hardening and multiple cracking characteristics under tension. Its superior tensile behavior may also influence the flexural behavior of reinforced PVA‐ECC beams. This paper investigates the load capacity and failure mode of reinforced PVA‐ECC beams in bending. Seven beams with different tensile reinforcement ratios, including six PVA‐ECC beams and one conventional concrete beam, were tested in the experimental program. The influence of reinforcement ratio on load capacity and failure characteristics was discussed in detail. Test results showed that with increasing reinforcement ratio, the ultimate load of beams was increased, but the failure mode was changed from fracture of PVA‐ECC in the tension zone to crushing in the compression zone, thereby limiting the full development of beam ductility. An analytical model is proposed to calculate the load and the vertical deflection of beams. In the model, the tension‐stiffening effect of reinforcement after cracking of PVA‐ECC is considered by defining the bond–slip relationship of reinforcement embedded in PVA‐ECC. Comparisons are made between experimental results in the literature and those calculated by using the analytical model to show the accuracy of the model in predicting the load–deflection relationship, the moment–rotation relationship, and the moment–curvature relationship.

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