Moment Magnifier Method for Long-Term Behavior of Flat Plates Subjected to In-Plane Compression
Publication: Journal of Structural Engineering
Volume 129, Issue 1
Abstract
Floor slabs of deep basement structures are subjected to large compressive forces due to soil and hydraulic lateral pressures. In this study, nonlinear finite-element analyses were carried out to improve the existing moment magnifier method so that it is applicable to the long-term behavior of the flat plates. For this purpose, a computer program that can address creep and shrinkage as well as geometrical and material nonlinearity was developed. Parametric studies were performed to investigate the characteristics of the long-term behavior and the load-carrying capacities of flat plates. In the proposed moment magnifier method, the creep factor was introduced to accommodate the effect of creep on the load-carrying capacity. A design example was presented to demonstrate the proposed design method.
Get full access to this article
View all available purchase options and get full access to this article.
References
American Concrete Institute (ACI) Committee 209, Subcommittee II. (1971). “Prediction of creep, shrinkage and temperature effects in concrete structures.” ACI Special Publication No. 27, Detroit.
American Concrete Institute (ACI). (1999). “Building code requirements for structural concrete.” ACI 318-99, Detroit, 100–101, 121–124, 209–228.
Anderson, C. A. (1982). “Numerical creep analysis of structures.” Creep and shrinkage in concrete structures, Wiley, New York, 259–303.
Bažant, Z. P.(1982a). “Input of creep and shrinkage characteristics for a structural analysis program.” Mater. Struct., 15, 283–290.
Bažant, Z. P. (1982b). “Mathematical models for creep and shrinkage of concrete.” Creep and shrinkage in concrete structures, Wiley, New York, 163–256.
Bažant, Z. P., and Panula, L.(1980). “Creep and shrinkage characterization for analyzing prestressed concrete structures.” Prestr. Concr. Inst. J.,3, 86–122.
Comité Euro-International du Béton-Fédération International de la Précontrainte (CEB-FIP). (1978). Model code for concrete structures, Paris, Vol. 2, Appendix e.
Kim, J. (2000). “RC flat plate under in-plane compression and non-uniform floor load.” MS thesis, Seoul National Univ., Seoul, Korea.
Kraus, Harry. (1980). Creep analysis, Wiley-Interscience, New York.
Park, H.(1999). “Numerical study on RC flat plates subjected to combined axial and transverse load.” J. Struct. Eng. Mech. Int. J.,8(2), 137–150.
Park, H., and Kim, E.(1999). “RC flat plate under combined in-plane and out-of-plane loads.” J. Struct. Eng., 125(10), 1136–1142.
Park, H., and Klingner, R. E.(1997). “Nonlinear analysis of RC members using plasticity with multiple failure criteria.” J. Struct. Eng., 123(5), 643–651.
Taylor, P. J.(1970). “Initial and long-term deflections of a reinforced concrete flat plate structure.” Civil Eng. Trans. (Sydney),12(1), 14–20.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 129 • Issue 1 • January 2003
Pages: 87 - 95
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Feb 6, 2001
Accepted: Feb 26, 2002
Published online: Dec 13, 2002
Published in print: Jan 2003
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.