Experimental investigation of load distribution in a composite girder bridge at elastic versus inelastic states

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DOIResolve DOI: http://doi.org/10.1016/j.engstruct.2012.10.034
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Journal titleEngineering Structures
Pages707718; # of pages: 12
SubjectBridge design; Bridge elements; Bridge model; Calculated values; Composite girder bridges; Distribution characteristics; Distribution factor; Elastic limit; Experimental investigations; Flexure; Highway bridge design; Internal forces; Live loads; Load distribution factor; Load distributions; Loading tests; Maximum moments; Reinforced; Scale models; Slab-on-girder bridge; Steel girder; Traffic loads; Beams and girders; Bridges; Composite bridges; Concrete slabs; Concretes; Numerical analysis; Steel; Loading; bridge; composite; concrete structure; design method; experimental study; failure analysis; flexure; loading; reinforced concrete; steel structure
AbstractBridge design and evaluation involve the determination of the internal forces and moments that each bridge element must resist. In slab-on-girder bridges, the moment and shear caused by traffic loads are normally determined using load distribution factors. These factors are derived based on results of analytical models, numerical analyses, as well as actual loading tests, but there appears to be scant experimental data to gauge their accuracy, particularly beyond the elastic limit state. To address the scarcity of the experimental data and to understand how the distribution characteristics of concrete slab on steel girder composite bridges change with the advent of yielding and inelasticity, a 1/3 scale model of a hypothetical composite bridge was tested to failure in this study.Extensive measurements were taken during the test to allow better understanding of the response of slab-on-girder bridges as well as their live load distribution characteristics at all stages of loading up to failure. The experimentally determined distribution factors for the tested bridge model are compared with the calculated values based on the Canadian Highway Bridge Design Standard, and the code values are found to overestimate the maximum moment in the interior loaded girder by about 22% and 33% at the elastic and the inelastic states, respectively. © 2012 Elsevier Ltd.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Research in Construction (IRC-IRC)
Peer reviewedYes
NPARC number21269760
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Record identifier24e8aa98-9dc8-4897-a5cb-3860d35635d3
Record created2013-12-13
Record modified2016-05-09
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