Development of design criteria for simply supported slab-and-girder bridges for specialized military loading system
Alam, Gulfam
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https://hdl.handle.net/2142/20482
Description
Title
Development of design criteria for simply supported slab-and-girder bridges for specialized military loading system
Author(s)
Alam, Gulfam
Issue Date
1994
Doctoral Committee Chair(s)
Gamble, William L.
Department of Study
Civil and Environmental Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
Finite element was used to analyze thirty slab-and-girder right bridges which are simply supported. All structures were subjected to two different sets of loading, M1A1-Abram Tank, and M1A1 loaded on M1000 Semitrailer. Total fifty-eight analyses were done (thirty for tank loaded on semitrailer and twenty-eight for tank alone) and maximum bending moments and deflections for both exterior and interior girders were calculated. Different parameters, like bridge span, girder spacing, and stiffness parameter were used to define a particular bridge. All the bridges in the study had five girders (all pretensioned I-shaped). Span of the bridge ranged from 40 to 80 feet, and girder spacing varied from 6 to 9 feet.
The results for maximum bending moments for exterior girder were then compared with the previous studies and AASHTO specifications. It was found that results compare very well with the past work on the subject. AASHTO specifications for maximum bending moments in the exterior girder were found to be simplistic. Static moments in conjunction with derived distribution factor from the analysis results were used to find the maximum bending moments in the exterior girder. These results were found to compare well with the analysis data and previous studies.
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