Publisher : The Computational Structural Engineering Institute
DOI : 10.7734/COSEIK.2016.29.2.187
Title & Authors
Pier Stiffness and Bridge Collapse Mechanism Kook, Seung-Kyu;
While structures are designed within elastic range by other designs, plastic behavior of structures should be verified and controlled in order to prevent structural collapse by the earthquake resistant design. No Collapse Requirement for typical bridges is to avoid falling down of superstructure by way of plastic behavior of certain structural elements and to operate emergency vehicles after earthquake. Such plastic behavior is restricted to connections or pier columns and appropriate measures are required for each case. Earthquake Resistant Design part of Roadway Bridge Design Code provides design processes for Ductile Collapse Mechanism by forming plastic hinges at pier columns. Also for bridges with reinforced concrete piers ductility-based design processes are provided as an appendix constructing Brittle Collapse Mechanism with connection yielding. In this study, a typical bridge with steel bearing connections and reinforced concrete piers is selected and No Collapse Design procedure considering both Ductile and Brittle Collapse Mechanism is proposed together with revisions required for the Earthquake Resistant Design part.
earthquake resistant design;plastic behavior;no collapse requirement;falling down of superstructure;ductile collapse mechanism;brittle collapse mechanism;
AASHTO (2004) AASHTO LRFD Bridge Design Specifications, SI Units Third Edition.
Kook, S.K. (2014) No Collapse Design for Typical Bridges, J. Comput. Struct. Eng. Inst. Korea, 27(3), pp.163-172.
Lee, S.J. (1999) RC Ghost - PM Diagram.
Midas IT (2004) Midas/Civil User Manual, Ver. 6.3.0 (Release no. 1), Midas IT Co. Ltd..
Ministry of Land, Transport & Maritime Affairs (1997) Research for Earthquake Resistant Design Standard (II).
Ministry of Land, Transport & Maritime Affairs (2010) Roadway Bridge Design Code, Chapter 6: Earthquake Resistant Design pp.6-1-6-41, Appendix I1-I8.