Load Distribution in a Composite Steel Box Girder Bridge.

摘要

Field tests were performed to assess the behavior of a steel box girder bridge having a composite,concrete,roadway deck slab. The structure was instrumented at one midspan cross-section and a section near the support of Span 20,one of the simple approach spans,to permit studies of bending and shear strain distributions. Live load was applied with a simulated AASHO design truck and a double goose-neck, lowbed hauler ballasted to a gross load of 220,000pounds. Theoretical analyses were performed with a finite element program called FINPLA. Live load membrane strains were accurately predicted by the program,but fiber strains,especially in the transverse direction,were greatly influenced by plate warpage and initial,local,dead load deflections. (Modified author abstract)