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Seismic P-$\Delta$ Effects of Slender RC Columns in Earthquake Analysis  

Kwak, Hyo-Gyoung (한국과학기술원 건설 및 환경공학과)
Kim, Jin-Kook ((재)포항산업과학연구원 강구조연구소)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.19, no.4, 2006 , pp. 375-387 More about this Journal
Abstract
Different from the previous studies which investigated seismic P-$\Delta$ effect in slender columns though comparison of response spectra according to stability coefficients obtained from the analyses based on the assumed moment-curvature relationship, the axial force and P-$\Delta$ effect in RC columns are investigated on the basis of the layered section method which can effectively consider the changes of stiffness and yield strength due to the application of axial force in RC members. Practical ranges of slenderness and stability coefficient are assumed, and sixty sets of horizontal/vertical earthquake inputs are used in the analysis. From the parametric study, it is noted that the maximum deformation of the slender RC column is hardly affected by P-$\Delta$ effect or vortical earthquake but dominantly affected by the applied axial force. Therefore, it can be concluded that no additional consideration for the P-$\Delta$ effect and vortical earthquake is required in the seismic design of a slender RC column if the axial force effect is taken into account in the analysis and design procedures.
Keywords
layered section model; slender RC column; P-$\Delta$ effect; vertical earthquake;
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Times Cited By KSCI : 1  (Citation Analysis)
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