Risk-Based Management Guidelines for Scour at Bridges with Unknown Foundations

[mahyarov]

Risk-Based Management Guidelines for Scour at Bridges with Unknown Foundations

Author: Stein, Stuart | Size: 2.50 MB | Format: PDF | Quality: Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 458 | ISBN: -

The US currently has over 60,000 bridges over water with unknown foundations. This report presents a risk-based approach to managing these bridges in the absence of foundation information. The general framework in this report, which is primarily applied to scour failure, can easily be applied to other hazards such as earthquakes and tsunamis. The guidelines illustrate how to collect appropriate data, estimate risk of failure from an estimated failure probability and associated economic losses, and use risk in a structured approach to select an appropriate management plan. Risk analysis is specifically used to select appropriate performance standards for various bridge classifications and justify the costs of nondestructive testing of foundations, monitoring activities, and countermeasures. The scour guidelines were applied to sixty case studies in the US to validate the management plan that was selected for bridges with known foundations, and to illustrate the specific application of the guidelines in a variety of settings.

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