Effectiveness of Exterior Beam Rotation Prevention Systems for Bridge Deck Construction

Ashiquzzaman, Md; Li, Hui; Schmeltz, Justin; Merino, Carlos; Bozkurt, Bora; Ibrahim, Ahmed; Lindquist, Will; Hindi, Riyadh

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https://hdl.handle.net/2142/91030 Copy

Description

Title

Effectiveness of Exterior Beam Rotation Prevention Systems for Bridge Deck Construction

Author(s)

• Ashiquzzaman, Md
• Li, Hui
• Schmeltz, Justin
• Merino, Carlos
• Bozkurt, Bora
• Ibrahim, Ahmed
• Lindquist, Will
• Hindi, Riyadh

Issue Date

2016-06

Keyword(s)

• overhang width
• exterior girder rotation
• rotation prevention system
• TAEG program
• experimental study

Geographic Coverage

Illinois

Abstract

Bridge decks often overhang past the exterior girders in order to increase the width of the deck while limiting the required number of longitudinal girders. The overhanging portion of the deck results in unbalanced eccentric loads to the exterior girders, which are generally greatest during construction. These eccentric loads mainly come from the bridge placing and finishing equipment as well as fresh concrete and other construction live loads that can create rotation of the exterior girders in the transverse direction. The rotations can also affect both the global and local stability of the girders as well as the bridge. In this study, the current bracing systems used by the Illinois Department of Transportation (IDOT) were evaluated through field instrumentation, finite element analysis (FEA), and the use of the Torsional Analysis Exterior Girders (TAEG)) program. Alternative bracing systems were evaluated through an experimental study and FEA. Based on this work, it is recommended that intermediate cross frames with top and bottom angles in addition to cross-angle sections in the exterior panels be specified to limit exterior girder rotation during construction. An alternative approach is to place transverse ties and diagonal pipes in the exterior panels at a spacing to maintain the spacing-to-girder-depth ratio below 3.94.

Publisher

Illinois Center for Transportation/Illinois Department of Transportation

Series/Report Name or Number

Illinois Center for Transportation Series No. 16-016; Research Report No. FHWA-ICT-16-015

ISSN

0197-9191

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/91030

Sponsor(s)/Grant Number(s)

Illinois Department of Transportation, R27-140

Copyright and License Information

No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161

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