Performance Evaluation of Cold -Formed Steel Braced Frames for Seismic Loads

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil and Environmental Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Lee, Moon Sung

Contributors dc:contributor

• Foutch, Douglas A.

• Engineering, Civil

Language dc:language

eng

Identifier

(MiAaPQ)AAI3182307

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83262