Dynamic behavior of pre-stressed slab bridges

Abstract

In last 10 years pre-stressed in-situ slab bridges has become one of the used bridge deck type for new bridges in Latvia. This structure is used for overpasses on road junctions where height of the bridge deck and space under the superstructure is limited by the levels of roads. This research show and discuss dynamic test results performed from 2008 to 2015. One reinforced concrete (RC) and three pre-stressed RC slab bridges were tested. One ribbed RC and three pre-stressed RC ribbed slab bridges were tested. Results show that for PRC bridges span/depth ratio correlate with damping ratio- higher span/depth ratio show decrease in damping ratio. For even pavement condition DAF values are lower than 1,4.