This paper describes the results of a field test on a cable stayed bridge subjected to vehicle loads. the test was conducted as partof an extensive research program concerned with the overall field response of a cable stayed bridge under a variety of loading conditions. the test structure is a concrete twin box-girder bridge with a 630-ft main span and two approach spans on either side supported by asingle plane of stay cables. the vehicle loading was applied by placing a heavily loaded truck at specific locations in both the interior and exterior lanes of the main span and adjacent spans of the bridge. response information was obtained from an extensive array of electrical resistance strain gages mounted on dummy reinforcing bars imbedded in the concrete and placed within selected deck segments. data from the electrical resistance strain gages were automatically recorded using a data acquisition system. results from these load tests are presented and discussed. the response information is also compared with that predicted from a detailed finite element model of thestructure. this paper appears in transportation research record no.1290, third bridge engineering conference, march 10-13, 1991, denver, colorado, volume 1.
Abstract