Application of self-centring hybrid rocking columns in steel frames. (August 2022)

• Record Type: Journal Article
• Authors: Wang, Yuan-Zuo; Li, Yan-Wen; Wang, Yan-Bo; Wang, Meng
• Is Part Of: Journal of constructional steel research. Volume 195(2022)
• Publication Date: 2022-08
• Subjects: Self-centring -- Rocking columns -- Steel frame -- Experimental test -- Numerical model -- Nonlinear time history analysis; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2022.107349
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: This study proposed a novel rocking component, namely self-centring hybrid rocking columns (SCR). Cyclic loading tests are conducted on a substructure consisting of the SCR and a frame beam-to-SCR connection to investigate its hysteretic performance. A numerical model of the SCR substructure is built and validated against the test results. Finally, the seismic performance of steel frames equipped with the SCR is demonstrated through the nonlinear time history analysis. It shows that the proposed self-centring hybrid rocking column has acceptable lateral resisting, energy dissipation and self-centring capability. The simplified numerical model of the SCR can reasonably well capture the hysteretic behaviour of the SCR substructure no matter with or without the steel damper and tension braces. The system-level analysis of steel frames with the SCRs verifies the effectiveness of the proposed SCR in mitigating maximum and residual drift responses of steel frames under earthquakes. After equipping the SCRs, the inter-storey drift concentration is also mitigated under earthquakes. Highlights: A novel rocking component, namely self-centring hybrid rocking columns (SCR), is proposed. Cyclic loading tests are conducted on a substructure consisting of the SCR and a frame beam-to-SCR connection. A numerical model of the SCR substructure is built and validated against the test results. The system-level analysis of steel frames with the SCRs verifies the effectiveness of the proposed SCR.