LOADING TEST ON RC COLUMN WITH STRENGTH-STRATIFYING REBAR FOR IMPLEMENTING COLLAPSE SCENARIO DESIGN

Abstract

 Although design earthquake motion is based on the previous disaster records and researches, the larger earthquake motion might happen. Collapse scenario design realizes resilient road bridges that will not lose the function or can be quickly recovered from the damage against larger earthquake motion. To implement the proposed design method, strength-stratifying rebar was developed. The previous study shows the effectiveness of strength-stratifying rebar on the computer analysis. In this research, we construct the RC column specimen with strength-stratifying rebar and analyze the effectiveness through the loading test. The result shows that strength-stratifying rebar enhances the pier strength as designed. However, the fact was found that in addition to the effects of bending strain in the plastic hinge region, elongation of axial rebar and residual elongation of pier needs to be considered for calculating the gap of strength-stratifying rebar’s anchor plate.