Structural Deterioration Assessment for Steel Bridges

Farhey, Daniel N.; Thakur, Aniruddha; Buchanan, Robert J.; Aktan, A. Emin; Jayaraman, N.

doi:10.1061/(asce)1084-0702(1997)2:3(116)

Cited by 16 publications

(13 citation statements)

References 2 publications

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“…The assessment procedure usually starts with in situ and laboratory tests: these allow understanding the material properties where they are not known as confirmed by recent studies ͑Ermopoulos 2006; Farhey et al 1997͒: moreover, the precise steel material adopted could be investigated, e.g., specific interventions could be planned. Among all, some studies could be stated as reference in fatigue analysis, e.g., Out et al ͑1984͒ andFisher et al ͑1987͒, that reported the fatigue strength of deteriorated riveted built-up members of an 80-year old railroad bridge; Kulicki et al ͑1990͒ studied the environmental effects of corrosion on fatigue strength of steel bridge beams.…”

Section: ͑1997͒mentioning

confidence: 99%

Structural Analysis and Fatigue Reliability Assessment of the Paderno Bridge

Pipinato

Modena

2010

Pract. Period. Struct. Des. Constr.

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The Paderno Bridge along the Adda river in the northern part of Italy is a relevant arch-bridge connecting Milan and Bergamo province in the northern part of Italy: the bridge is part of the Monza-Bergamo line and is in service from 1889. A stepwise and practical approach for evaluating the structural integrity of historical and deteriorated steel bridges, incorporating analytical, mechanical, and structural characterizations, is presented. Critical regions of hot spot members were identified using structural finite-element analysis, and fatigue reliability assessment analysis has been performed along with traffic estimation, taking into account various scenarios of traffic increase, in order to assess the possible remaining fatigue life. This analysis has evidenced that the structure might be kept in service at least for other 10 years. Appropriate retrofitting interventions are also indicated.

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Section: ͑1997͒mentioning

confidence: 99%

Structural Analysis and Fatigue Reliability Assessment of the Paderno Bridge

Pipinato

Modena

2010

Pract. Period. Struct. Des. Constr.

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“…The identified analytical model was used to demonstrate that flexibility coefficients are more sensitive to local damage than either frequencies or mode shapes. Throughout the mid-1990s a series of studies were carried out to investigate the use of structural identification to develop an improved understanding of actual load resisting mechanisms of common bridge types (Aktan et al, 1993a;Aktan et al, 1995aAktan et al, , 1995bAktan et al, 1996;Farhey et al, 1997;Lenett et al, 1997;Catbas et al, 1997;Turer et al, 1998). These studies employed multiple reference impact tests to develop modal flexibility models, which were subsequently validated through static crawlspeed truck tests.…”

Section: A11 Short-to Moderate-span Bridgesmentioning

confidence: 99%

Impacts of Epistemic (Bias) Uncertainty on Structural Identification of Constructed (Civil) Systems

Moon

Aktan

2006

The Shock and Vibration Digest

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“…If routinely practiced during periodic evaluation of all bridges, structural identification applications would enable alert for necessary action [4,5]. To achieve safe service life, such a diagnostic approach can be used for advanced prognosis through failure analysis based on a fieldcalibrated model [6]. Therefore, the foundation of desirable bridge management remains in the effective diagnostics of existing bridges, since any decision to take preventive steps is based on this judgment.…”

Section: Structural Identificationmentioning

confidence: 99%

“…The field-calibrated analytical model and the engineering results are highly dependent on the type and level of evaluation [4,5,7]. A main drawback to structural identification has been the lack of integration between analytical and experimental research, compounded by the difficulties in experimentation on an actual structure [6,8]. To help minimize these diagnostic difficulties, reliable and practical field instrumentation and monitoring capability is necessary.…”

Section: Structural Identificationmentioning

confidence: 99%

Bridge Instrumentation and Monitoring for Structural Diagnostics

Farhey

2005

Structural Health Monitoring

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Diagnostic instrumentation and monitoring of bridges are essential for reliable structural condition assessment and performance evaluation. This management step applies particularly to structurally deficient bridges that cannot be accurately evaluated by inspection and/or analysis alone. Reliable evaluation is an economic and engineering requirement before any decision-making for preventive action. Thus, field diagnostic capabilities are indispensable tools to enable evaluation and support field-calibrated modeling, analysis, identification, and load rating. The reliability of structural evaluation for objective bridge management is determined by the dependable performance of all the system components. Although instrumentation and monitoring procedures appear to be well established, some misconceptions still keep recurring critically in practice. To improve the state-of-practice of structural diagnostics, available field systems and methods need re-evaluation of their instrumentation and monitoring performance under real-world conditions. Subsequently, dedicated field capabilities can be formulated and developed to have advanced and practical characteristics. This article discusses various less-emphasized critical aspects of multidisciplinary research experience on bridge structural health monitoring, to explore dependable evaluation methods, compile practical data on actual bridge monitoring for immediate implementation, and generate focused insight for the development of advanced, reliable, and practical research methods in the future. To reach a systematic conceptualization for a better methodology, various diagnostic components are criticized. The resulting discussions on the various bridge evaluation aspects are practical for transportation agencies, bridge officials, and researchers. The detailed aspects are intended to help select appropriate implementation practices in field applications of bridge instrumentation and monitoring. These help focus bridge management policies, re-orient evaluation strategies, and reconsider diagnostic methods.

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Structural Deterioration Assessment for Steel Bridges

Cited by 16 publications

References 2 publications

Structural Analysis and Fatigue Reliability Assessment of the Paderno Bridge

Structural Analysis and Fatigue Reliability Assessment of the Paderno Bridge

Impacts of Epistemic (Bias) Uncertainty on Structural Identification of Constructed (Civil) Systems

Bridge Instrumentation and Monitoring for Structural Diagnostics

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