Research Article
Nov 1980
Nonlinear Creep Buckling of Reinforced Concrete Columns
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VIEW THE REPLYAuthors: Zdeněk P. Bažant, F.ASCE, and Tatsuya TsubakiAuthor Affiliations
Publication: Journal of the Structural Division
Volume 106, Issue 11
Abstract
This model accounts not only for the rapid increase of creep at high compressive stress (flow) but also for the decrease of creep observed for subsequent load increments after a long period of low sustained compressive stress (adaptation). A simply supported column is analyzed for typical load histories: sustained loading; short-time loading to failure; and sustained load followed by short-time loading to failure. Numerical results confirm that the flow nonlinearity makes the column fail in a finite time and the adaptation nonlinearity makes the response to the short-time load applied after a long period of a low sustained load stiffer. Also, there is a substantial difference in the column strength for the same load duration depending upon the loading history, especially the ratio of constant sustained load (dead load) and short-time load (live load) and their durations. This could be taken into account in setting the safety factors for columns subjected to dead and live loads of various ratios.
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Published In
Journal of the Structural Division
Volume 106 • Issue 11 • November 1980
Pages: 2235 - 2257
Copyright
© 1980 American Society of Civil Engineers.
History
Published in print: Nov 1980
Published online: Feb 1, 2021
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Authors
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Zdeněk P. Bažant, F.ASCE
Prof. of Civ. Engrg., Northwestern Univ., Evanston, Ill.
Tatsuya Tsubaki
Grad. Research Asst., Northwestern Univ., Evanston, 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.