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http://dx.doi.org/10.4334/JKCI.2004.16.4.467

Nonlinear Numerical Analysis for Shear Dominant RC Columns Subjected to Lateral Force  

Kim Ick-Hyun (Dept. of Civil & Environmental Engineering, University of Ulsan)
Sun Chang-Ho (Dept. of Civil & Environmental Engineering, University of Ulsan)
Lee Jong-Seok (Dept. of Civil & Environmental Engineering, University of Ulsan)
Publication Information
Journal of the Korea Concrete Institute / v.16, no.4, 2004 , pp. 467-476 More about this Journal
Abstract
Because of crack control by steel bars after cracking the material models for reinforced concrete(RC) differ from those for plain concrete(PL). The nonlinear behavior of columns subjected to lateral load was simulated with reasonable accuracy in 3D analysis by applying distinct material models for RC and PL zone subdivided properly on the section. The shear strain is confirmed to develope unstably with ununiform distribution in out-of-plane direction. And this tendency becomes stronger as the thickness of column member increases in out-of-plane direction. If this ununiformity in strain distribution is not taken into consideration the capacity and the deformability of columns in shear dominant failure are overestimated excessively in two dimensional analysis. By introducing equivalent softening model a behavior of columns can be predicted too in two dimensional analysis.
Keywords
RC columns; nonlinear behavior; shear failure; 3D analysis; softening model; zoning problem;
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