Disposable Knee Bracing: Improvement in Seismic Design of Steel Frames
Publication: Journal of Structural Engineering
Volume 112, Issue 7
Abstract
A new and practical technique of lateral bracing for single‐ and multistory steel frame construction is presented and discussed. Disposable Knee Bracing (DKB) technique, as it is called in this paper, is made up of two structural elements, the knee element and the diagonal brace element. The knee element is a fuse‐like element that dissipates energy by the formation of plastic flexural hinges at its ends and midspan when the building is subjected to severe lateral loads. The diagonal brace element, on the other hand, provides the required level of lateral stiffness and remains in the elastic range at all time. The knee element is a disposable beam element that can be replaced once its energy dissipation capacity is utilized. Standard limit analysis of low‐ and high‐rise steel frames are presented to demonstrate the advantages of the DKB against traditional bracing and eccentric bracing.
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References
1.
Engineering News Records (ENR), Oct., 1983, pp. 28–31.
2.
Kasai, K., and Popov, E. P., “General Behavior of WF Steel Shear Link Beams,” Journal of Structural Engineering, ASCE, Vol. 112, No. ST2, Feb., 1986, pp. 362–382.
3.
Manheim, D. N., and Popov, E. P., “Plastic Shear Hinges in Steel Frames,” Journal of Structural Engineering, ASCE, Vol. 109, No. ST10, Oct., 1983, pp. 2404–2419.
4.
Manual of Steel Construction, 8th ed., AISC, 1980.
5.
Popov, E. P., and Bertero, V. V., “Seismic Analysis of Some Steel Building Frames,” Journal of the Engineering Mechanics Division, ASCE, Vol. 106, No. EM1, Feb., 1980, pp. 75–92.
6.
Popov, E. P., “Seismic Steel Framing Systems for Tall Buildings,” Engineering Journal, AISC, Vol. 19, No. 3, 3rd quarter, 1982, pp. 141–149.
7.
Roeder, C. R., and Popov, E. P., “Eccentrically Braced Steel Frames for Earthquakes,” Journal of the Structural Division, ASCE, Vol. 104, No. ST3, Mar., 1978, pp. 391–412.
8.
Salmon, C. G., and Johnson, J. E., Steel Structures, 2nd ed., Harper and Row, New York, N.Y., pp. 862–864.
9.
Uniform Building Code, International Conference of Building Officials, Whittier, Calif., 1980.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 112 • Issue 7 • July 1986
Pages: 1544 - 1552
Copyright
Copyright © 1986 ASCE.
History
Published online: Jul 1, 1986
Published in print: Jul 1986
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