Performance Evaluation of Cold -Formed Steel Braced Frames for Seismic Loads
Lee, Moon Sung
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https://hdl.handle.net/2142/83262
Description
Title
Performance Evaluation of Cold -Formed Steel Braced Frames for Seismic Loads
Author(s)
Lee, Moon Sung
Issue Date
2005
Doctoral Committee Chair(s)
Foutch, Douglas A.
Department of Study
Civil and Environmental Engineering
Discipline
Civil and Environmental Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
A series of 2-, 4- and 6-story buildings were designed and evaluated using the proposed method. It was found that 4- and 6-story buildings design and configured based on current provisions using an R factor of 4 did not satisfy the design objective. This resulted mainly from excessive drift demands in the top stories. The buildings were redesigned using an R of 3 and an R of 2, but the buildings were still inadequate. To reduce the excessive drift demand in the top story, the original buildings were reconfigured by using the same braces in even numbered stories that were used in the story below. This resulted in buildings that satisfied the design objective in all cases. Next, the original buildings were reconfigured by making only the top stories stiffer and stronger. These buildings also satisfied the design objectives. Major observations and conclusions are given. Recommendations for future research are presented.
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