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Title: EFFECTS OF REMOVING DIAPHRAGMS FROM STEEL GIRDER BRIDGE
Accession Number: 00730358
Record Type: Component
Record URL: Availability: Find a library where document is available Abstract: Many multigirder steel bridges built before the 1980s are experiencing distortion-induced fatigue cracking at diaphragm-girder connections. A means of eliminating the cyclic stresses that cause those fatigue problems is to remove the interior diaphragms (diaphragms not at the girder supports). The effects of removing all interior channel diaphragms from an existing simple-span bridge with rolled-steel girders were evaluated based on field measurements of girder stresses and deflections made before and after the diaphragms were taken out. Results from tests with trucks of known weight indicate that removing the diaphragms resulted in increases between 6 and 15% in the maximum bottom flange stresses experienced by the most heavily loaded girder. Results for loading by trucks of unknown weight in normal traffic indicate that the most heavily loaded girder may carry up to 17% more load as a result of removing the diaphragms.
Supplemental Notes: This paper appears in Transportation Research Record No. 1541, Structures, Culverts, and Tunnels.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Stallings, J MCousins, T EStafford, T EPagination: p. 183-188
Publication Date: 1996
Serial: ISBN: 0309059143
Features: Figures
(4)
; References
(11)
; Tables
(3)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls
Files: TRIS, TRB
Created Date: Jan 2 1997 12:00AM
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