Fatigue crack retrofitting by closing crack surface

Yuanzhou, Zhiyuan; Ji, Bohai; Fu, Zhuojia; Kainuma, Shigenobu; Tsukamoto, Shigeaki

doi:10.1016/j.ijfatigue.2018.10.006

Cited by 15 publications

(7 citation statements)

References 18 publications

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“…Furthermore, it was observed that the double wrapping sample behaved in a manner showcasing flexible behaviour after cracking. The attained result shows as if double-wrapped specimen was able to carry the peak load between 50% and 70% at a deflection of 3 mm ( L /300) (YuanZhou et al , 2019). It can also be depicted that using basalt woven fabric with different wrapping (single and double) increases the flexural strength and load-carrying capacity of CC.…”

Section: Resultsmentioning

confidence: 95%

“…Finally, reduction of stress concentration factor is achieved by over 70%. Albeit an assortment of fibre strengthening materials exist now, fibre reinforced cement (FRC) used for auxiliary applications is regularly prepared with steel strands (YuanZhou et al , 2019). Utmost valued properties of steel fibre reinforced cement (SFRC) are as enlisted as follows: improved flexural strength; flexural weariness perseverance; and effective opposition. …”

Section: Introductionmentioning

confidence: 99%

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Improving structural performance of concrete beams by U-wrapped basalt fibre: a retrofitting approach

Kannan¹,

K.²,

V.³

2022

WJE

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Purpose The aim of the work is to investigate structural behaviour of reinforced concrete (RF) beam retrofitted with basalt fibre (BF) fabric. The incorporation of BF showed enhancement in bending strength, to increase confinement and to repair damages caused by cracking. In the early decades, using BF for composite materials shaped BF as an excellent physical substance with necessary mechanical properties, highlighting the significant procedures ability. Design/methodology/approach Specimens were casted with U-wrapped BF and then evaluated based on flexural tests. In the test carried over for flexural fortifying assessment, BF reinforcements demonstrated a definitive quality improvement in the case of the subjected control sample; ultimately, the end impacts depend upon the applied test parameters. From the outcomes introduced in this comparison, for the double-wrapped sample, the modifications improved by 12% than that of the single-wrapped beam, which is identified to subsist for a better strengthening of new-age retrofitting designs. Findings The current research deals with the retrofitting of RC beam by conducting a comparative experiment on wrapping of BF (single or double BF wrapping) in improving the mechanical behavior of concrete. Originality/value It can be shown from the experimental results that increasing the number of layers has significant effect on basalt strengthened beams.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Improving structural performance of concrete beams by U-wrapped basalt fibre: a retrofitting approach

Kannan¹,

K.²,

V.³

2022

WJE

View full text Add to dashboard Cite

show abstract

“…Corrosion fatigue tests were implemented on the corroded wires, as illustrated in Figure 5. To obtain the fatigue lifetime and fractography of wires, a loading protocol with a mean force of 14.793 kN and a force amplitude of 8.241 kN was adopted according to the requirements in the standard GB/T 17101 22,23 in which it is stipulated that the wire should be able to withstand 2 × 10 6 fatigue cycles (i.e., fatigue safety life) under specific fatigue load, and the mean stress (i.e., σ m ) and stress amplitude (i.e., σ a ) are 0.45σ u —180 MPa and 180 MPa, respectively. Accordingly, the fatigue safety life is used as the baseline to evaluate the fatigue lifetime of the wires subjected to corrosion fatigue.…”

Section: Corrosion Fatigue Testingmentioning

confidence: 99%

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Liu

Guo

et al. 2020

Fatigue Fract Eng Mat Struct

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In-service bridge wires often fail prior to the design life subjected to alternating stresses and environmental erosion. In this paper, a novel corrosion fatigue test device, integrating fatigue testing machine and electrochemical accelerated corrosion assemblies, was developed to characterize the corrosion fatigue and electrochemical behaviour of the wires. Using the developed device, corrosion fatigue tests of corroded bridge wires under different corrosion and loading conditions were conducted. Electrochemical characteristics, corrosion fatigue behaviour, failure mechanism, and so forth were investigated according to electrochemical measurements, fracture morphologies and the lifetime of wires. Results evidence the synchronization of corrosion and fatigue and show the accelerated corrosion due to static and fatigue stresses. Additionally, cracking and fracture induced by multiple crack initiation was dominant in corrosion fatigue of corroded wires, and the coexistence of multiple corrosion pits decreased the lifetime significantly.

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“…And the reinforcement effect of closed crack face to fatigue crack has been proved by a large number of experiments. An internal eccentric crack model is proposed as the equivalent model of crack distribution after crack closure (YuanZhou et al, 2019). The crack propagation of steel wire under axial tension is studied from the aspects of initial crack shape, size and relative spacing (Li et al, 2020;Liu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The prediction of residual life of liquid-storage tank considering the tank wall surface state

Lai

Wang

Wei

et al. 2022

IJSI

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PurposeThe purpose of the paper is to predict the residual life of liquid-storage tank to ensure safety and long-term service life of the structure.Design/methodology/approachThe paper carried out the stress analysis of the wall plate and bottom plate of the liquid-storage tank, and the influence of circumferential stress on the tank is considered. On the other hand, considering the influence of the tank wall surface on the tank life, based on the Paris law, the surface processing coefficient and surface roughness coefficient are introduced to improve the Paris law.FindingsThe effectiveness of the improved model is verified by comparing with theoretical and experimental data, which provide a new method for the prediction of the remaining service life of the tank. Combined with the fatigue crack data in the test report and the calculated circumferential stress, the residual life of the storage tank is predicted.Originality/valueThe improved model provides a new method for the prediction of the remaining service life of the tank.

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Fatigue crack retrofitting by closing crack surface

Cited by 15 publications

References 18 publications

Improving structural performance of concrete beams by U-wrapped basalt fibre: a retrofitting approach

Improving structural performance of concrete beams by U-wrapped basalt fibre: a retrofitting approach

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

The prediction of residual life of liquid-storage tank considering the tank wall surface state

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