https://scholars.lib.ntu.edu.tw/handle/123456789/634081
標題: | Cyclic test and finite element analysis of a steel double K-braced frame with laterally-restrained plates for RC building retrofit | 作者: | CHUNG-CHE CHOU Nian, Ping Zhao, Guang Shang |
關鍵字: | Cyclic test | Finite element analysis | In-plane buckling | RC building retrofit | Steel double K-braced frame | 公開日期: | 1-八月-2023 | 卷: | 189 | 來源出版物: | Thin-Walled Structures | 摘要: | Damage was discovered in existing 24-story reinforced concrete (RC) buildings in New Taipei City under the 2015 Hualien earthquake with a magnitude of 6.3. A new scheme was proposed to retrofit the buildings by adding a steel concentrically double K-braced frame in a limited space, with diaphragm plates to laterally restrain each brace to increase its buckling strength. A cyclic test was first conducted on a full-scale steel braced frame specimen, composed of a steel boundary frame, two pairs of K-type-arranged plates for axially loaded braces, diaphragm plates for brace buckling restraint, and surrounding RC members. Secondly, a finite element (FE) analysis was conducted on the specimen for a correlation study and investigation of force transfer between the infilled braced frame and surrounding RC members. A finite element parametric study was then conducted on single braces with different numbers of restraint and plate thicknesses to investigate the cyclic behavior and buckling force. The AISC 360-16 (2016) provides a very conservative prediction of the brace bucking force, but the prediction based on Wolchuk (1963) reasonably matches well the test and FE analysis results. A cyclic backbone curve for a single brace modeling, considering in-plane lateral supports, was proposed in this work. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/634081 | ISSN: | 02638231 | DOI: | 10.1016/j.tws.2023.110918 |
顯示於: | 土木工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。