Bridge stress-range history. Paper presented at the 51st Annual Meeting of the Highway Research Board HRB, Washington, D.C., January 1972.

A computer system for monitoring stress history data and reducing them to digital form was used to estimate the effect of traffic on the fatigue life of a 3-span, continous-stringer highway bridge. Tests were performed by using control vehicles to measure the load-carrying characteristics of the bridge. Further, extensive stress-range data on the stringers were obtained under general conditions during a 97-hour period.