Dynamic behaviour of concrete bridges prestressed by external cables

摘要

Bridges from prestressed concrete with external cables are a proper solution for new structures or as a repair system of existing bridge structures. Dynamic behaviour of one bridge was tested in situ and on mathematical models and influence of axial forces in external cables was verified. WIM results were processed and parameters of traffic flow were used to simulate passages of heavy vehicles over FEA models of the bridge. Time histories of passages were processed by Rain Flow Method and results were used for checking fatigue stress on models of the bridge with and without external cables, respectively.