TR0003 (REV 10/98) TECHNICAL REPORT DOCUMENTATION PAGE STATE OF CALIFORNIA • DEPARTMENT OF TRANSPORTATION For individuals with sensory disabilities, this document is available in alternate formats. For information call (916) 654-6410 or TDD (916) 654-3880 or write Records and Forms Management, 1120 N Street, MS-89, Sacramento, CA 95814. ADA Notice CA14-2175 1. REPORT NUMBER 2. GOVERNMENT ASSOCIATION NUMBER 3. RECIPIENT'S CATALOG NUMBER Concrete Confinement Model Synthesis Study A Critical Review of Column Confinement Reinforcement Used in Current Seismic Bridge Design Practice 4. TITLE AND SUBTITLE August 2014 5. REPORT DATE 6. PERFORMING ORGANIZATION CODE Aaron Shelman and Sri Sritharan 7. AUTHOR 8. PERFORMING ORGANIZATION REPORT NO. Department of Civil, Construction and Environmental Engineering 9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT NUMBER 65A0389 11. CONTRACT OR GRANT NUMBER California Department of Transportation Division of Engineering Services 1801 30th Street, MS #9-2/5i Sacramento, CA 95816 12. SPONSORING AGENCY AND ADDRESS Final Report April, 2011 – June 2013 13. TYPE OF REPORT AND PERIOD COVERED 14. SPONSORING AGENCY CODE 15. SUPPLEMENTARY NOTES Prepared in cooperation with the State of California Department of Transportation 16. ABSTRACT This study focuses on critically evaluating confinement requirements suggested for plastic hinge regions of bridge columns suggested by California Department of Transportation (Caltrans). In addition to section analyses, a series of pushover and earthquake dynamic analyses were conducted on several bridge columns to formulate appropriate recommendations to improve the confinement requirements. It is shown that the plastic hinge length, ultimate compression strain and ductility demand should be revised to improve the seismic performance of bridge columns. In addition, the impact of unexpectedly high inelastic demands that some earthquake can impose on bridge columns should be adequately addressed. Seismic; bridge; concrete; column; design; confinement; analysis; model; fiber-section 17. KEY WORDS No restriction. This document is available to the public through the National Technical Information Service, Springfield, Virginia 22161 18. DISTRIBUTION STATEMENT Unclassified 19. SECURITY CLASSIFICATION (of this report) 116 20. NUMBER OF PAGES 21. COST OF REPORT CHARGED Reproduction of completed page authorized.
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