01333064

Component

https://doi.org/10.3141/2253-08

http://scholar.google.com...hman&publication_year=2011

Current design specifications for mechanically stabilized earth reinforcements incorporate metal-loss models to consider the loss from the corrosion of the metallic reinforcements, but these models have limited application with respect to reinforcement type and fill conditions. Results discussed in this paper broaden the recommendations for metal-loss modeling and describe effects of fill quality and reinforcement type on performance and service life. The variation in metal loss is considered within the context of reliability-based design, through the load and resistance factor design (LRFD) approach adopted in current AASHTO bridge design specifications. Under this approach, several variables that affect resistance, including metal loss, are considered, with a single parameter that controls the reliability of the design. Thus, new resistance factors are presented from the analysis of a newly expanded performance database, in terms of different reinforcement types and fill materials. The results from an example problem are presented to demonstrate the application of LRFD and the newly derived resistance factors that consider metal type, reinforcement type, design methods, and the design impacts of different electrochemical properties of reinforced fill.

01358796

11-0488

English

pp 73-80

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309222891

Print

Figures (4) ; References (19) ; Tables (3)

Corrosion; Earth walls; Electrochemistry; Fills; Geotechnical engineering; Load and resistance factor design; Material reinforcement; Mechanically stabilized earth; Retaining walls; Service life

Metal loss; Reliability-based design

Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics

PRP, TRIS, TRB, ATRI

Feb 17 2011 5:28PM

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