Detection and evaluation of failures in high-strength tendon of prestressed concrete bridges by acoustic emission

Yuyama, Shigenori; Yokoyama, Kohichi; Niitani, Kyoji; Ohtsu, Masayasu; Uomoto, Taketo

doi:10.1016/j.conbuildmat.2006.04.010

Cited by 95 publications

(37 citation statements)

References 3 publications

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“…Así, en los últimos años, en estructuras de hormigón armado, se ha propuesto el empleo de redes de fibra óptica para evaluar la corrosión (6), el empleo de técnicas de electromagnetismo (7) y emisión acústica (8) para evaluar el estado de aceros bajo tensión, o la fotoelasticidad para analizar la formación de grietas (9). En el caso de disoluciones que simulan la existente en los poros de hormigón, se ha propuesto la espectroscopía Raman in situ en aceros con un 9% de cromo (10), o el empleo de multielectrodos para evaluar la distribución de la corrosión en aceros al carbono o inoxidables (11).…”

Section: Introductionunclassified

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Estudio mediante AFM de la corrosión de aceros en disoluciones de fase acuosa del hormigón

Díaz-Benito¹,

Velasco²,

Guzmán³

et al. 2010

Mater. construcc.

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Section: Introductionunclassified

“…Thus, in recent years, optical fibre networks (6) have been proposed to evaluate corrosion in reinforced concrete structures. Besides, electromagnetism (7) and acoustic emission (8) techniques have also been proposed to evaluate the state of steel under strain. Also, photoelasticity has been proposed to analyse crack formation (9).…”

Section: Introductionmentioning

confidence: 99%

Estudio mediante AFM de la corrosión de aceros en disoluciones de fase acuosa del hormigón

Díaz-Benito¹,

Velasco²,

Guzmán³

et al. 2010

Mater. construcc.

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“…It has been widely used in aerospace, machine manufacturing pipelines, and many other fields. In bridge engineering, AE technique has been used to monitor concrete cracks [22], pre-stressed concrete defects [23], and cable conditions [24]. It can also be used to monitor the fatigue damage process of cable supported bridges and become an important part of structural health monitoring.…”

Section: Acoustic Emission Techniquementioning

confidence: 99%

Life-Cycle Cost Based Maintenance and Rehabilitation Strategies for Cable Supported Bridges

Cs¹,

Zhai²,

Ht³

et al. 2015

Volume 11 Number 3

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ABSTRACT:Initial cost was mainly considered in constructing a bridge in the past, whereas future payments such as the cost of strengthening or rehabilitation were neglected. This situation has brought numerous economic as well as social problems due to the lack of rational maintenance and rehabilitation strategies. Thus, it is necessary and urgent to develop appropriate bridge maintenance and rehabilitation strategies that not only meet serviceability criteria but also consider the life-cycle cost (LCC) optimization. This paper discusses major hazards of in-service cable supported bridges, including fatigue cracking of orthotropic steel decks, deterioration of cables, damage of main cables, hangers and expansion joints et al. Advanced maintenance and rehabilitation tools are introduced to save the life-cycle cost, acoustic emission monitoring technique and cold retrofit technique are detailed studied. A framework is provided for the strategies of maintenance and rehabilitation based on life-cycle cost. The framework takes into account of the safety, serviceability and sustainability during the lifetime of cable supported bridges.

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“…In fact, they are very susceptible to small damages, such as surface scratches, corrosion cracks and pits, which usually do not affect the performance of bars for concrete reinforcement [1]. Stress corrosion cracking is one the most probable causes of failure of high strength tendons in pre-stressed or post-stressed concrete structures [2][3][4][5]. These corrosion phenomena occur in the form of cracks, which nucleate and propagate due to combined action of tensile stresses and aggressive environment.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hot Mill Scale on Hydrogen Embrittlement of High Strength Steels for Pre-Stressed Concrete Structures

Cabrini

Lorenzi

Pastore

et al. 2018

Metals

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Abstract:The presence of a conductive layers of hot-formed oxide on the surface of bars for pre or post-compressing structures can promote localized attacks as a function of pH. The aggressive local environment in the occluded cells inside localized attacks has as consequence the possibility of initiation of stress corrosion cracking. In this paper, the stress corrosion cracking behavior of high strength steels proposed for tendons was studied by means of Constant Load (CL) tests and Slow Strain Rate (SSR) tests. Critical ranges of pH for cracking were verified. The promoting role of localized attack was confirmed. Further, electrochemical tests were performed on bars in as received surface conditions, in order to evaluate pitting initiation. The adverse effect of mill scale was recognized.

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Detection and evaluation of failures in high-strength tendon of prestressed concrete bridges by acoustic emission

Cited by 95 publications

References 3 publications

Estudio mediante AFM de la corrosión de aceros en disoluciones de fase acuosa del hormigón

Estudio mediante AFM de la corrosión de aceros en disoluciones de fase acuosa del hormigón

Life-Cycle Cost Based Maintenance and Rehabilitation Strategies for Cable Supported Bridges

Effect of Hot Mill Scale on Hydrogen Embrittlement of High Strength Steels for Pre-Stressed Concrete Structures

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