Construction and Testing of an Experimental Prestressed Concrete Bridge.

摘要

An experimental prestressed concrete I-beam bridge has been constructed as an integral part of the Pavement Durability Test Track Facility at The Pennsylvania State University. This two-span bridge has been instrumented and is being tested to evaluate the behavior of two different deck types. One span of the bridge was constructed with a conventional reinforced concrete composite slab. Wood forms were used on one-half the span,and metal stay-in-place forms on the other half. The other span was constructed with precast,prestressed concrete plank forms,topped with cast-in-place concrete. Instrumentation consisted of strain gages on the slab and beams and deflectometers on the beams. The bridge was loaded with a semi-trailer truck having maximum wheel loads of 17 kips. Measurements indicated that composite action was developed between the concrete plank and the cast-in-place topping. Full composite action was also developed between the beams and deck for both spans. (Modified author abstract)