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FIELD EVALUATION OF UNINTENDED COMPOSITE ACTION BETWEEN STEEL PLATE GIRDERS AND CONCRETE SLAB IN HIGHWAY BRIDGES
Author(s) -
Lu Renxiang,
Judd Johnn P.
Publication year - 2019
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.1192
Subject(s) - girder , structural engineering , slab , composite number , bridge (graph theory) , strain gauge , structural load , engineering , geotechnical engineering , materials science , composite material , medicine
Unintended composite action between steel plate girders and concrete slab is a well‐recognized, but challenging aspect of evaluating highway bridge behaviour because the degree of slip between the slab and girder is difficult to predict. In this study, a method to evaluate the effect of unintended composite action using field testing is presented. The method is illustrated using a four‐span five girder highway bridge instrumented with strain gages at maximum positive and negative moment locations and subjected to a vehicle with a calibrated load. Results indicate that all the girders exhibited partial composite action. Measurement of composite action was less reliable when the instrumented location was not close to the load.

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