Stiffening of Structural Cores by Floor Slabs
Publication: Journal of Structural Engineering
Volume 112, Issue 5
Abstract
A finite element analysis, in conjunction with Vlasov's theory of warping of thin‐walled beams, has been used to study the torsional stiffening of thin‐walled open‐section cores by the surrounding floor slabs. The relative influences of the most important geometrical parameters and slab support conditions are examined, and design curves are presented to allow the equivalent width and effective warping stiffness of the slab to be evaluated rapidly. The influence of the axial and flexural stiffness of the external columns is also considered. A numerical example illustrates the stiffening effect of the floor slabs on the most important design quantities for the core, the maximum rotation at the top and the warping moment (bimoment) at the base.
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References
1.
Coull, A., and Wong, Y. C., “Bending Stiffness of Floor Slabs in Cross‐Wall Structures,” Proceedings, ICE, Vol. 71, Part, 2, London, England, Mar., 1981, pp. 17–35.
2.
Galambos, T. V., “Elastic Behavior of Members,” Structural Members and Frames, 1st ed., Prentice‐Hall, Inc., Englewood Cliffs, N.J., 1968, pp. 33–53.
3.
Heidebrecht, A. C., and Stafford Smith, B., “Approximate Analysis of Open‐Section Shear Walls Subject to Torsional Loading,” Journal of the Structural Division, ASCE, Vol. 99, No. ST12, Dec., 1973, pp. 2355–2373.
4.
Tso, W. K., and Biswas, J. K., “Analysis of Core Wall Structures Subject to Applied Torque,” Building Science, Vol. 8, Part 3, London, England, 1973, pp. 251–257.
5.
Wong, Y. C., “Interaction between Floor Slabs and Shear Walls in Tall Buildings,” thesis presented to the Univ. of Strathclyde, at Glasgow, Scotland, in 1978, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
6.
Vlasov, V. Z., “Thin‐Walled Elastic Beams,” translated from Russian by the Israel Program for Scientific Translations, Jerusalem, Israel, 1961, distributed by National Technical Information Service, U.S. Department of Commerce, Springfield, Va.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 112 • Issue 5 • May 1986
Pages: 977 - 994
Copyright
Copyright © 1986 ASCE.
History
Published online: May 1, 1986
Published in print: May 1986
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