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Design Guidelines for the Seismic Modification of Welded Steel Moment Frame Buildings.

pdf icon Design Guidelines for the Seismic Modification of Welded Steel Moment Frame Buildings. (873 K)
Gross, J. L.

NIST SP 931; PB98-150238; August 1998.

U.S./Japan Natural Resources Development Program (UJNR). Wind and Seismic Effects. Joint Meeting of the U.S./Japan Cooperative Program in Natural Resources Panel on Wind and Seismic Effects, 30th. May 12-15, 1998, Gaithersburg, MD, Raufaste, N. J., Jr., Editor(s), 201-210 pp, 1998.

Available from:

National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161.
Telephone: 1-800-553-6847 or 703-605-6000;
Fax: 703-605-6900.
Order number: SN003-003-03577-7


frame connections; earthquakes; earthquake engineering; rehabilitation; steels


Prompted by the widespread damage to welded beam-to-column connections as a result of the 1994 Northridge earthquake, the National Institute of Standards and Technology (NIST) initiated a study to determine the efficacy of various techniques for the modification of existing welded steel moment frame connections to improve their seismic performance. Problems associated with retrofitting of existing WSMF buildings are discussed and the alternative strategies selected for study are described. Results of 18 full-scale tests of two-sided (interior) connections, some having a lightweight concrete slab on metal deck, are presented. Design guidelines, based on the experimental results, have been written in cooperation with the American Institute of Steel Construction (AISC) and are described.