A Comparison of Minimum Confinement in European and American Codes for Circular RC Bridge Columns

The maximum response modification factor (e.g. force reduction factor) in the range of 3 to 4 for ductile bending columns are used in Eurocode 8, AASHTO, ATC-32 and Caltrans BDS. Correspondingly, the displacement ductility capacity of structures should be more than 4, and the curvature ductility of structures should be more than 13. Attained curvature ductility levels of columns with the minimum confining reinforcement in the four documents are evaluated taking account of longitudinal reinforcement ratio and axial force ratio. It is shown that, the requirement of ATC-32 can assure expected ductility levels of columns. The minimum confining reinforcement specified in Caltrans BDS is not enough. The requirements of Eurocode 8 and AASHTO are relatively conservative for columns with low longitudinal reinforcement ratio and low axial force ratio, but deficient for columns with high longitudinal reinforcement ratio and high axial force ratio.

• Corporate Authors:

  Multidisciplinary Center for Earthquake Engineering Research

  State University of New York, 107 Red Jacket Quadrangle, P.O. Box 610025
  Buffalo, NY  United States  14261-0025
• Authors:
  • Yan, Gui-ping
  • Zhao, Guan-yuan
• Conference:
  • Third PRC-US Workshop on Seismic Analysis and Design of Special Bridges
  • Location: Shanghai , China
  • Date: 2004-10-21 to 2004-10-22
• Publication Date: 2005-4-20

Language

• English

Media Info

• Media Type: Print
• Edition: Technical Report
• Features: Figures; References; Tables;
• Pagination: pp 59-67
• Monograph Title: Proceedings of the Third PRC-US Workshop on Seismic Analysis and Design of Special Bridges

Subject/Index Terms

• TRT Terms: Bending; Bridges; Building codes; Confining pressure; Curvature; Dislocation (Geology); Ductility; Longitudinal reinforcement; Reinforced concrete
• Uncontrolled Terms: Axial force; Circular columns
• Geographic Terms: Europe; United States
• Subject Areas: Bridges and other structures; Design; Highways; Law; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01018072
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 1 2006 8:02AM