Guidelines for design and safe handling of curved I-shaped steel girders.
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2010-02-01
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Alternative Title:TxDOT project 0-5574: Curved plate girder design for safe and economical construction;Research project title: Curved plate girder design for safe and economical construction;
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Abstract:The purpose of this set of guidelines is to summarize recommendations from work
completed as part of the Texas Department of Transportation (TxDOT) Research Project 0-5574
entitled "Curved Plate Girder Design for Safe and Economic Construction." The research
included field tests, three-dimensional finite element parametric studies, and software
development. The full report for the study will be submitted by October 31, 2009 and includes a
more detailed explanation of the recommendations given within this document.
The development of general guidelines to ensure girder stability during lifting, erection
and early stages of construction is complicated by the wide range of variables that impact the
behavior of the girder system. These variables include girder proportioning, partially installed
bracing, crane positioning, the use and positioning of temporary supports, as well as several
other factors. To aide in assuring girder stability, two analytical tools were developed as part of
this research project. The analytical tools consist of a spreadsheet program (UT Lift) for
evaluating girder behavior during lifting, and a finite element program (UT Bridge) for analyzing
the behavior of I-girder bridges at various stages of erection and during construction of the
concrete bridge deck. While the guidelines presented herein have been developed to assist in
producing a stable system, the reader is encouraged to use the analytical tools, UT Lift and UT
Bridge, or other suitable analytical packages, to evaluate bridge girder systems during
construction.
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