Bridges for Service Life Beyond 100 Years: Innovative Systems, Subsystems, and Components (2014) / Chapter Skim
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Pages 154-159
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From page 154... ...
154 A p p e n d i x B problem Statement A large number of steel bridges have been constructed as a series of simple spans with deck expansion joints at each pier. This was a popular system concept because it was easy to design and construct.
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From page 155... ...
155 New York Experience The New York State DOT (NYSDOT) provides a good summary of criteria for continuity retrofit in the NYSDOT Bridge Design Manual, which discusses feasibility, general design considerations, and design guidelines (NYSDOT 2008)
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From page 156... ...
156 conventional splice, but the bottom flange connection can be made using a compression block fitted and welded between the ends of the girders. This live load retrofit method also adapts well if the existing deck is not fully replaced, but only a short section over the pier.
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From page 157... ...
157 New Mexico Experience The New Mexico DOT developed a girder connection using a splice plate for the top flange and placed the connection bolts outside the poured concrete diaphragm at the piers (Figure B.5)
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From page 158... ...
158 five 54-ft spans, alternate plans were prepared for stringer rehabilitation with continuity splices versus full stringer replacement. For this unit, all contractors bid full stringer replacement.
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From page 159... ...
159 girders are not directly spliced; rather, the deck is made continuous over the open gap between girder ends. See the link slab section in the main report for more detail.
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