TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Load and Resistance Factor Rating Using Site-Specific Data

Accession Number:

01002478

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Public/Blurbs/156132.aspx

Find a library where document is available


Order URL: http://worldcat.org/isbn/0309093813

Abstract:

Traditional techniques for bridge evaluation are founded on design-based deterministic equations that use limited site-specific data; they do not necessarily conform to a quantifiable standard of safety and often are quite conservative. The newly emerging method of load and resistance factor rating (LRFR) addresses some of these shortcomings and allows bridge rating in a manner consistent with load and resistance factor design but is not based on site-specific information. A probability-based method for load rating of bridges using the site-specific in-service structural response data in an LRFR format is presented. The use of site-specific structural response data eliminates a substantial portion of modeling uncertainty in live load characterization (involving dynamic impact and girder distribution) and yields more accurate bridge ratings. Rating at two limit states--yield and plastic collapse--is proposed for specified service lives and target reliabilities. This method considers a conditional Poisson occurrence of independent and identically distributed loads as well as uncertainties in field measurement and modeling and Bayesian updating of the empirical distribution function to obtain an extreme value distribution of the time-dependent maximum live load. An illustrative example uses in-service peak strain data from ambient traffic collected on a high-volume bridge and develops in-service LRFR equations to rate the instrumented bridge. Results from the proposed method are compared with ratings derived from more traditional methods.

Monograph Accession #:

01002432

Language:

English

Authors:

Bhattacharya, Baidurya
Li, Degang
Chajes, Michael

Pagination:

143-151

Publication Date:

2005

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: CD 11-S
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

6th International Bridge Engineering Conference: Reliability, Security, and Sustainability in Bridge Engineering

Location: Boston MA, United States
Date: 2005-7-17 to 2005-7-20
Sponsors: Transportation Research Board; Federal Highway Administration; American Association of State Highway and Transportation Officials (AASHTO); Massachusetts Highway Department; Texas Department of Transportation

ISBN:

0309093813

Media Type:

Digital/other

Features:

Figures (2) ; Photos (2) ; References (33) ; Tables (5)

Uncontrolled Terms:

Bridge rating; Site-specific data

Subject Areas:

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

Files:

TRIS, TRB

Created Date:

Jul 21 2005 11:09AM