Slab Behavior of a Prestressed Concrete Box-Beam Bridge. Hazleton Bridge,

摘要

The report describes part of the field testing of a beam-slab type highway bridge constructed with prestressed concrete box girders,and subjected to loading with a test vehicle approximating AASHO HS 20-44loading. The overall investigation includes studies of the behavior of the slab,and of lateral distribution of the vehicle loading. The purpose of this report is to describe the experimental investigation performed on the bridge slab. The testing consisted of the continuous recording of slab surface strains at various locations as the test vehicle was driven over the span at various speeds. Investigations are included on the lateral distribution of strains and stresses in the slab,the effect of speed on stresses,and local wheel load effects. Finally, a comparison of moments obtained experimentally with the design moment specified by AASHO is given. (Author)