基部に極軟鋼を用いた鋼製橋脚の耐震性能に関する研究

Abstract

The steel bridge pier with low yield steel plates at its base portion is proposed. The seismic resistance performance of this new type of pier is investigated experimentally, changing the thickness of low yield steel and number of stiffeners. In some case of parameters, extremely large deformation capacity is observed in the test results, as well as high maximum load. But some test specimens show brittle fracture at the low yield steel plate due to the repeated large local buckling deformation. In order to improve the issues arisen in the low yield steel plate, the use of higher plate of low yield steel plate is recommended.