|
Title |
Seismic Performance Evaluation of Full-size Non-seismic Circular RC Bridge Piers with Longitudinal Steel Lap splice
|
|
Keywords |
철근콘크리트 교각; 내진성능; 겹침이음; 횡구속 철근; 준정적 실험; RC bridge piers; seismic performance; lap splice; transverse steel; quasi-static test |
|
Abstract |
Most bridge piers were practically designed and constructed with lap spliced longitudinal reinforcing steels before the 1992 seismic design provisions of Korea Bridge Design Specification were implemented. It has been known that lap splice of longitudinal reinforcement in the plastic hinge region is not desirable for seismic performance of RC bridge piers. The objective of this research is to evaluate the seismic performance of existing circular reinforced concrete bridge piers by the Quasi-static test and to propose the need of seismic retrofit of existing bridge piers through the damage level. Test specimens were nonseismically designed with the aspect ratio 4.0 which could induce the flexural failure mode. It was confirmed from this experiment that significant reduction of seismic performance was observed for test specimens with lap spliced longitudinal reinforcing steels. Pertinent seismic retrofit was determined to be needed for existing RC bridge piers with the lap-spliced of 50% longitudinal reinforcing steels.
|