2023 Volume 79 Issue 13 Article ID: 22-13028
A collapse scenario design method has been proposed to realize a road bridge that does not lose its functionality or can be restored quickly under overload conditions, and RC bridge piers with strength-stratifying rebars have been considered as a means to realize this method. As part of the study, dynamic analyses of 1, 200 cases of RC piers and strength-stratified piers with varying values of material and geotechnical properties based on the current standards were conducted to investigate their effects on the scenarios. As a result, it was confirmed that the current RC piers were designed to achieve the desired scenario of plasticization of the pier bases with more than 90% reliability against level 2 earthquake motion. On the other hand, for excess seismic motion, most of the piers not strength-stratified exceed the limit state 3, but the strength-stratified piers can be guided to a scenario that avoids collapse with more than 90% reliability.
