교각 강성에 의한 일반교량의 붕괴방지구조

Abstract

The purpose of the earthquake resistant design is the No Collapse Requirement and pass a emergency vehicles when is a earthquake. The Earthquake Resistant Design Part of Roadway Bridge Design Code provides a basic design process to construct the Ductile Mechanism for the bridge structure. If substructure yielding occurs, plastic hinges should be designed at both ends of pier columns in order to get ductile mechanism. Therefor the Earthquake Resistant Design Part provides the spectrum analysis method using response modification factors in order to get the ductile mechanism. Also the Earthquake Resistant Design Part provides a ductile-based design process as an appendix, which is prepared for bridges with reinforced concrete piers. According to the ductile-based design process, designer determines a required response modification factor for substructure and transverse reinforcement for confinement therefrom. If connection failure occurs which lead to brittle mechanism. In this study, a typical bridge with steel bearing connections and reinforce concrete piers is selected and No Collapse Design procedure considering both Ductile Mechanism and Brittle Mechanism are carried out. Based on results, No collapse Design procedure considering Ductile and Brittle mechanism are proposed with revisions required for the Earthquake Resistant Design Part.