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A Study of Jointless Bridge Behavior

by D. Siros, West Virginia Univ, Morgantown, United States,
C. Spyrakos, West Virginia Univ, Morgantown, United States,



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

The pressing need for maintenance free and low construction cost bridges, has increased the interest and activity in building integral or jointless bridges. The investigation of the behavior of such bridges under various loading conditions is attempted here, and a comparison is made with the widely used seat abutment bridge system. Three dimensional modeling and analysis of an integral bridge (Figure 1) is presented for various loads such as self weight of the structure, creep of concrete slab and temperature gradient across the depth of the deck. The system considered, is a single span, 15 m long, 6 m high, 9 m wide integral bridge with a composite concrete slab - steel stringer cross section (Figure 2). The results demonstrate the paramount significance of creep and thermal loads in jointless bridges versus bridge systems on seat abutments.

Subject Headings: Maintenance and operation | Bridge abutments | Bridge management | Bridge decks | Highway bridges | Bridge design | Thermal loads

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