Fatigue criteria for integrity assessment of long-span steel bridge with health monitoring

Li, Z.X.; Chan, Tommy H.T.

doi:10.1016/j.tafmec.2006.07.003

Cited by 26 publications

(23 citation statements)

References 15 publications

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“…Monitoring System (WASHMS) developed by Li and Chan (2006) comprises 774 sensors including accelerometers, strain gauges, displacement transducers, level sensors, anemometers, temperature sensors, and weigh-in-motion sensors spread out over three bridges. More modest SHM systems use a much smaller array of sensors, such as the system implemented by Liu et al (2008).…”

Section: Acceleration-based Systems Using Ambient Vibrationmentioning

confidence: 99%

Development of a structural health monitoring system for the life assessment of critical transportation infrastructure.

Roach¹,

Jáuregui

Daumueller

2012

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Recent structural failures such as the I-35W Mississippi River Bridge in Minnesota have underscored the urgent need for improved methods and procedures for evaluating our aging transportation infrastructure. This research seeks to develop a basis for a Structural Health Monitoring (SHM) system to provide quantitative information related to the structural integrity of metallic structures to make appropriate management decisions and ensuring public safety.This research employs advanced structural analysis and nondestructive testing (NDT) methods for an accurate fatigue analysis. Metal railroad bridges in New Mexico will be the focus since many of these structures are over 100 years old and classified as fracture-critical. The term fracture-critical indicates that failure of a single component may result in complete collapse of 4 the structure such as the one experienced by the I-35W Bridge. Failure may originate from sources such as loss of section due to corrosion or cracking caused by fatigue loading. Because standard inspection practice is primarily visual, these types of defects can go undetected due to oversight, lack of access to critical areas, or, in riveted members, hidden defects that are beneath fasteners or connection angles. Another issue is that it is difficult to determine the fatigue damage that a structure has experienced and the rate at which damage is accumulating due to uncertain history and load distribution in supporting members. A SHM system has several advantages that can overcome these limitations. SHM allows critical areas of the structure to be monitored more quantitatively under actual loading. The research needed to apply SHM to metallic structures was performed and a case study was carried out to show the potential of SHM-driven fatigue evaluation to assess the condition of critical transportation infrastructure and to guide inspectors to potential problem areas. This project combines the expertise in transportation infrastructure at New Mexico State University with the expertise at Sandia National Laboratories in the emerging field of SHM.5

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Section: Acceleration-based Systems Using Ambient Vibrationmentioning

confidence: 99%

Development of a structural health monitoring system for the life assessment of critical transportation infrastructure.

Roach¹,

Jáuregui

Daumueller

2012

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“…As a result, a significant amount of research are ongoing for development of precious structural health monitoring and life assessment methods [2][3][4][5][6][7][8][9][10][11][12]. As railway bridges are vulnerable for time-dependent fatigue damage due to cyclic nature of traffic loads, the assessment of remaining fatigue life of railway bridges for continuing services has become more important than ever, especially when making decisions regarding structure replacement and other major retrofits.…”

Section: Introductionmentioning

confidence: 99%

Fatigue reliability assessment of ageing railway truss bridges: Rationality of probabilistic stress-life approach

Adasooriya

2016

Case Studies in Structural Engineering

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a b s t r a c tRail authorities all over the world are paying attention to extend the service lives of railway bridges. The famous Miner's rule employed deterministic or probabilistic fatigue assessment approaches are generally used to predict remaining fatigue life of ageing railway bridges. Under many variable amplitude loading conditions, life predictions have been found to be unreliable since Miner's rule does not properly take account the loading sequence effect. Therefore, this paper presents a comparison of a new probabilistic fatigue assessment approach with deterministic approach consisting of a new damage indicator, which captures the loading sequence effect of variable amplitude loads more precisely than the Miner's rule. The comparison is performed by applying both fatigue assessment approaches to predict the remaining fatigue life of an ageing railway bridge. This comparison intends to conclude the possibility of capturing uncertainty behind loading sequence effect by proposed probabilistic fatigue assessment approach. Initially the paper presents the both approaches. Then the proposed approaches are applied to predict the fatigue lives of an ageing railway bridge. Finally predicted fatigue lives are compared and rationality, significance and validity of the proposed approaches are discussed.

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Section: Introductionmentioning

confidence: 99%

Fatigue Reliability of Ageing Railway Bridges: Feasibility of Probabilistic Approach

Adasooriya¹

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Fatigue criteria for integrity assessment of long-span steel bridge with health monitoring

Cited by 26 publications

References 15 publications

Development of a structural health monitoring system for the life assessment of critical transportation infrastructure.

Development of a structural health monitoring system for the life assessment of critical transportation infrastructure.

Fatigue reliability assessment of ageing railway truss bridges: Rationality of probabilistic stress-life approach

Fatigue Reliability of Ageing Railway Bridges: Feasibility of Probabilistic Approach

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