01002445

Component

https://doi.org/10.3141/trr.11s.2418j1737656r674

https://scholar.google.co...umar&publication_year=2005

The new AASHTO "Guide Manual for Condition Evaluation and Load and Resistance Factor Rating of Highway Bridges" (LRFR manual) was developed under NCHRP Project 12-46 to be consistent with the AASHTO "LRFD Bridge Design Specifications" in the use of a reliability-based limit-states philosophy. The new manual provides procedures and calibrated load and resistance factors for load rating, posting, overweight permit review, and fatigue life assessment. The LRFR manual has implemented a systematic approach to bridge rating and posting that yields uniform reliability indexes where possible while providing a more realistic assessment of the safe load capacity of existing bridges. LRFR proposes a system for bridge load rating and permit evaluation that uses site-specific information to narrow the uncertainty in some of the evaluation variables. This paper provides an overview of the major changes introduced in the new LRFR manual, with emphasis on LRFR load rating, posting, and permit evaluation procedures that are intended to provide consistent reliability in bridge safety evaluations.

01002432

English

pp 49-55

2005

Transportation Research Record: Journal of the Transportation Research Board

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

0309093813

Digital/other

Figures (2) ; References (7) ; Tables (2)

Bearing capacity; Highway bridges; Limit state design; Load and resistance factor design; Load factor; Manuals; Overweight loads; Permits; Reliability; Safety

Bridge rating

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

TRIS, TRB

Jul 20 2005 2:44PM