Research Article
Oct 1974
R/C Column Earthquake Response in Two Dimensions
Publication: Journal of the Structural Division
Volume 100, Issue 10
Abstract
The earthquake responses of a spirally reinforced concrete column carrying a concentrated mass and subjected to the simultaneous action (biaxial response) of both horizontal components of normalized 1940 El Centro, 1962 Taft, and 1971 Pacoima Dam accelerograms were studied. Two different masses, corresponding to initial elastic periods of 0.65 and 1.5 sec, were considered. The column force-displacement characteristics were synthesized from idealized stress-strain properties for steel and confined and unconfined concrete, using a discretization of the column cross section combined with finite element techniques. Maximum displacements were significantly larger in biaxial response when excitation was sufficiently intense in relation to the column strength to cause appreciable inelastic deformation. If planar analysis indicates inelastic response in a column resisting earthquake effects in both horizontal directions, the effects of the axial load (P-Δ effect) may be more critical and the required ductility may be larger than that based on planar analysis.
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Published In
Journal of the Structural Division
Volume 100 • Issue 10 • October 1974
Pages: 1999 - 2015
Copyright
© 1974 American Society of Civil Engineers.
History
Published in print: Oct 1974
Published online: Feb 1, 2021
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Authors
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A. Emin Aktan
Asst. Prof. of Civ. Engrg., Middle East Technical Univ., Ankara, Turkey
David A. Pecknold, AM.ASCE
Asst. Prof. of Civ Engrg., Univ. of Illinois at Urbana-Champaign, Urbana, Ill.
Mete A. Sozen, M.ASCE
Prof. of Civ. Engrg., Univ of Illinois at Urbana-Champaign, Urbana, Ill.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.