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Title:

Assessment of Performance Reliability of Scoured Bridges Based On Probabilistic Inference with In-Suit Monitoring Data

Accession Number:

01340456

Record Type:

Component

Abstract:

Scour continues to be the most detrimental cause for bridge degrading and failures in the United States and around the world. Considerable efforts have been made for predicting and detecting scour depth. Nevertheless, a management decision on operation, closure, retrofitting, or replacement of scour-critical bridges should be made in terms of their performance levels, e.g., Fully Operational, Partially Operational, Life-safe threaten, or Near Collapse, which can only be determined from computational simulation of bridge's responses under hazards in terms of its displacement and remaining resistance. It is crucial to determine the bridge system's properties and computational model and evaluate their accuracy. While some of these properties are relative easy to examine, the properties of foundation and dynamic impacts of flood are difficult to estimate and model. This difficulty is compounded if the bridge's foundation type is unknown. Deterministic system identification, which relies on updating parameters in a single model, often yields unidentifiable conditioning or nonunique parameters for this complex system and cannot address the inherent model uncertainties. There is a need for application of probabilistic approach to reliably assessing the performance of scoured-bridges based on in-suit sensor measurement. However, little research has been conducted in this area. This paper reviews the relevant practice and research development on this subject, discusses their limitations, and presents solutions to current challenges and the needed research.

Monograph Accession #:

01329018

Report/Paper Numbers:

11-3020

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Zheng, Wei
Peng, Bin
Zhang, Zhenbu

Pagination:

16p

Publication Date:

2011

Conference:

Transportation Research Board 90th Annual Meeting

Location: Washington DC, United States
Date: 2011-1-23 to 2011-1-27
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

References

Subject Areas:

Bridges and other structures; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls

Source Data:

Transportation Research Board Annual Meeting 2011 Paper #11-3020

Files:

TRIS, TRB

Created Date:

Feb 17 2011 6:22PM