Proposed Guideline for Reliability-Based Bridge Inspection Practices

Washer, Glenn; Nasrollahi, Massoud; Applebury, Christopher Ryan; Connor, Robert; Ciolko, A T; Kogler, Robert; Fish, Philip E.; Forsyth, David

doi:10.17226/22277

Cited by 28 publications

(27 citation statements)

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“…For example, this maximum can be selected as six years. This is based on the maximum inspection interval from [36], as well as the maximum inspection interval used in European bridge inspection agencies [4]. However, theoretically deterioration models are capable of making projections well beyond six years.…”

Section: Uncertainty Thresholds and Stages Of Service Lifementioning

confidence: 99%

An Integrated Uncertainty-Based Bridge Inspection Decision Framework with Application to Concrete Bridge Decks

et al. 2019

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The limitations of the standard two-year interval for the visual inspection of bridges required by the U.S. National Bridge Inspection Standards have been well documented, and alternative approaches to bridge inspection planning have been presented in recent literature. This paper explores a different strategy for determining the interval between inspections and the type of inspection technique to use for bridges. The foundational premise of the proposed approach is that bridge inspections are conducted to increase knowledge about the bridge’s current condition, and therefore, are only required when uncertainty about the knowledge of the bridge condition is too high. An example case of a reinforced concrete bridge deck was used to demonstrate how this approach would work. The method utilized deterioration models for predicting corrosion and crack initiation time, considering the uncertainty in the models’ parameters. Bridge inspections were used to update the current condition information and model parameters through Bayesian updating. As this paper presents a new idea for inspection planning, not all of the data or models necessary to fully develop and validate the approach currently exist. Nonetheless, the method was applied to a simulated example which demonstrates how the timing and means of bridge inspection can be tailored to provide the required data about individual bridges needed for effective bridge management decision making.

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Section: Uncertainty Thresholds and Stages Of Service Lifementioning

confidence: 99%

An Integrated Uncertainty-Based Bridge Inspection Decision Framework with Application to Concrete Bridge Decks

et al. 2019

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“…(In fact, the NCHRP recently published a proposed guideline for reliability-based bridge assessments (Washer 2014).) Fundamentally, the procedures would remain the same.…”

Section: Considerations For Civil Infrastructurementioning

confidence: 99%

Risk-Based Inspection and Hazard Assessments: Analogs for Civil Infrastructure

McCann¹,

Viz²

2015

Structures Congress 2015

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Day-to-day environmental and operational conditions that lead to deterioration of in-service structures are most often addressed through prescriptive inspection routines or handled on an ad-hoc basis. These approaches lack effectiveness if inspections are untimely or efforts are misdirected. Gains may be realized by following risk-based inspection paradigms in civil infrastructure. Related industries, such as the oil and gas, chemical process, energy and commercial aerospace sectors have long been applying risk-based methods to perform hazard assessments and to then prioritize the inspection and maintenance of structures and systems. These risk-based methods are used to identify, evaluate and control hazards, many of which involve more typical day-to-day deterioration hazards in addition to rare, high-consequence hazards. This paper will serve to highlight hazard assessment techniques and risk-based inspection methods from related industries and suggest how analogous methods may be used for civil infrastructure.

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“…The authors proposed that although equation 2is suggested for project-level analysis, it can be extended for use in network-level analysis (Mohammadi, Guralnick and Yan 1995). Nonetheless, life-cycle cost assessment has also been used to determine optimal timing and efficiency of bridge activities via systematic optimization BAS modeling (Jiang and Sinha 1989 Other literatures, including (Washer, et al 2014) presents the need for Risk-Based Inspection (RBI) practices for bridges. According to the authors, the need for RBI methodological practices differ from traditional approaches that are generally calendar based, because the setting of inspection frequencies (or intervals) and scope are not fixed or uniform (Washer, et al 2014).…”

Section: Bridge and Guardrail Sustainability Studiesmentioning

confidence: 99%

“…Nonetheless, life-cycle cost assessment has also been used to determine optimal timing and efficiency of bridge activities via systematic optimization BAS modeling (Jiang and Sinha 1989 Other literatures, including (Washer, et al 2014) presents the need for Risk-Based Inspection (RBI) practices for bridges. According to the authors, the need for RBI methodological practices differ from traditional approaches that are generally calendar based, because the setting of inspection frequencies (or intervals) and scope are not fixed or uniform (Washer, et al 2014). RBI practices considers the effects of bridge type, age, condition, importance, environment, loading, prior problems, and other characteristics that contribute to the reliability and durability of bridges sequentially (Washer, et al 2014).…”

Section: Bridge and Guardrail Sustainability Studiesmentioning

confidence: 99%

“…According to the authors, the need for RBI methodological practices differ from traditional approaches that are generally calendar based, because the setting of inspection frequencies (or intervals) and scope are not fixed or uniform (Washer, et al 2014). RBI practices considers the effects of bridge type, age, condition, importance, environment, loading, prior problems, and other characteristics that contribute to the reliability and durability of bridges sequentially (Washer, et al 2014). Moreover, by analyzing the likelihood of anticipated damage modes and the associated outcomes or consequences, RBI practices focus attention specifically on the damage and deterioration mechanisms that are most important for ensuring bridge safety.…”

Section: Bridge and Guardrail Sustainability Studiesmentioning

confidence: 99%

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