Research Article
Oct 1974
Inelastic Structural Response to 2D Ground Motion
Publication: Journal of the Engineering Mechanics Division
Volume 100, Issue 5
Abstract
According to current seismic design philosophy, structures are allowed, for economic reasons, to undergo deformations well into the inelastic range when subjected to a strong motion earthquake. Results presented show that the simultaneous action of both horizontal components of ground motion produces significantly larger displacements than those produced by a single component for stiff structures proportioned according to the Uniform Building Code. The magnification of response due to biaxial motion depends primarily on the initial fundamental elastic period of the structure and on the amount of inelastic deformation which a single component of ground motion would produce. The interaction of gravity loads with these increased displacements can cause the P-Δ effect to be more critical than for one-dimensional ground motion. The numerical results presented are for a series of single and three-story structures with elastoplastic uniaxial restoring force characteristics.
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Published In
Journal of the Engineering Mechanics Division
Volume 100 • Issue 5 • October 1974
Pages: 949 - 963
Copyright
© 1974 American Society of Civil Engineers.
History
Published in print: Oct 1974
Published online: Feb 3, 2021
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David A. Pecknold, AM.ASCE
Asst. Prof. of Civ. Engrg., Univ. of Illinois at Urbana-Champaign, Urbana,Ill.
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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.