Field Tests of a Continuous Twin Girder Steel Bridge

摘要

The structural behavior of a twin girder continuous steel bridge was studied in the field to provide data for a fatigue evaluation of the structure. Girder strains and deflections were measured under normal traffic and with a 52,000-lb test truck traveling at various speeds up to 50 mph using high-speed data acquisition equipment. An analysis of the data showed a maximum flange stress range of 3.1 ksi due to the test truck. A structural analysis of the bridge gave theoretical results which were within 10 percent of the measured flange stresses. Experimental data with the truck at high speed were more reliable than data with the truck stationary.