Effects of Bridge Deck Thickness on Properties and Behavior of Bridge Decks
| Autor: | George E. Ramey, Daniel M. Balmer |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Practice Periodical on Structural Design and Construction. 8:83-93 |
| ISSN: | 1943-5576 1084-0680 |
| DOI: | 10.1061/(asce)1084-0680(2003)8:2(83) |
| Popis: | In early 2001, the Alabama Department of Transportation (ALDOT) increased its minimum bridge deck thickness to 178 mm (7 in.), and thus ALDOT's deck thicknesses now range from 178-197 mm (77.75 in.). Even with the upgrade, ALDOT still utilizes the thinnest decks in the country. Thicker bridge decks are stiffer, stronger, and should provide a longer service life; however, they cost more and require a stronger and more costly support girder system. All of the parameters investigated in the parameter sensitivity study, with the exception of 2 (deck unit weight and initial cost), support increasing Alabama's minimum bridge deck thickness. An increase in thickness from 178-203 mm (78 in.) would cause the deck unit weight to increase 287-575 N/m2 (6--12 psf), depending on whether the concrete is added to the top or the underside of the deck. This would increase the cost of the bridge deck around $2.15/m2 ($1.80/yd2), and would translate into an increase in deck initial cost of ~23%. However, increasing the deck thickness from 178-203 mm (78 in.) would also increase the deck service life, reducing life-cycle cost of the deck/bridge. |
| Databáze: | OpenAIRE |
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