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http://dx.doi.org/10.4334/JKCI.2003.15.5.715

Confinement Steel Amount for Ductility Demand of RC Bridge Columns under Seismic Loading  

Son, Hyeok-Soo (Dept. of Civil Engineering, Yeungnam University)
Lee, Jae-Hoon (Dept. of Civil Engineering, Yeungnam University)
Publication Information
Journal of the Korea Concrete Institute / v.15, no.5, 2003 , pp. 715-725 More about this Journal
Abstract
This paper is a part of a research program to develop a new design method for reinforced concrete bridge columns under seismic loading. The objectives of this paper are to investigate the relationship between ductility and confinement steel amount and to propose a design equation for reinforced concrete bridge columns. Computer program NARCC was used for parametric study, which was proved to provide good and conservative analytical result especially for deformation capacity and ductility factor compared with test result. A total of 7,200 reinforced concrete columns confined with spirals or perfect circular hoops were selected by combination of variables such as section diameter, aspect ratio, concrete compressive strength, yielding strength of longitudinal and confinement steel, longitudinal steel ratio, axial load ratio, and confinement steel ratio. Based on the parametric study a new design equation for confinement steel amount considering ductility demand was proposed, which can be used in the new seismic design method, i.e. ductility-based seismic design, for RC bridge columns.
Keywords
reinforced concrete bridge columns; seismic design; confinement steel amount; ductility demand; proposed design equation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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