Dynamic strain measurements of the Lindquist bridge

This paper describes the dynamic strain measurement testing of the Lindquist Bridge, a logging bridge in the central interior of British Columbia, Canada. The Lindquist Bridge is a 24m single span bridge designed to carry logging traffic over Lindquist Creek. The bridge consists of a four meter wide steel-free concrete deck supported on two steel girders. Six strain gauges, one displacement sensor, and one temperature gauge were used to instrument the bridge. The strain and temperature gauges were mounted permanently in order to facilitate future testing. The dynamic loading was applied by driving a loaded dump truck across the bridge. The dynamic characteristics of the bridge were investigated using the dynamic strain time histories and compared with the results from ambient vibration testing.