Seismic Performance of Prestressed Concrete Bridge Column of East Sea Bridge

Abstract:

The fiber element analytical method for bonded and unbonded prestressing column under cyclic loading is proposed and verified,and then the fiber element model for the pier of East Sea Bridge is built.Study of quasistatic behavior shows that the bonded prestressing high-strength steel bars have obvious effect on the stiffness of the type of pier,and little effect on strength,and there is dramatic residual displacement of the pier of East Sea Bridge.To mitigate the residual displacement of the pier, different configurations of prestressing strands are considered.The hollow rectangular piers with the unbonded prestressing strands at the center of the cross section can satisfy the demands of serviceability limited state and have the most superior seismic performance.Further research should be focused on the prestressing ratio and the prestressing area of this kind of pier.

Key words:hollow rectangular pier,seismic performance,bonded prestressing tendons,unbonded prestressing tendons,fiber element method,hysteresis performance