Reference Type:  Journal Article
Record Number: 1
Author: Hu, J. W.
Year: 2012
Title: Design motivation, mechanical modeling and nonlinear analysis of composite pr moment frames with smart sma connection systems
Journal: Advanced Steel Construction
Volume: 9
Issue: 4
Pages: 16
Start Page: 334
Short Title: Design motivation, mechanical modeling and nonlinear analysis of composite pr moment frames with smart sma connection systems
DOI: 10.18057/IJASC.2013.9.4.5
Keywords: Composite moment frames, Shape memory alloys (SMAs), Partially restrained (PR) connections, Concrete-filled tube (CFT) columns, Stiffness models, Mechanical modeling, Nonlinear frame analyses
Abstract: This paper focuses on seismic design and behavior of hybrid structures composed of partially restrained (PR) steel-concrete composite-moment frames (C-MFs). The innovative aspects of this research are to introduce new smart connections between steel beams and concrete-filled tube (CFT) columns that utilize a combination of low-carbon steel and shape memory alloy (SMA) components in the C-MF design. In these new connections, we can exploit the recentering effect provided by super-elastic SMA tension bars to reduce both building damage and residual drift after a major earthquake event, while the low-carbon steel components provide excellent energy dissipation. The results of corresponding component tests were used to develop cyclic stiffness models for individual components in the connection. The seismic behavior of the composite moment-resisting frames with new connection systems was reproduced by performing nonlinear pushover and time-history analyses. The analysis results suggest that these frames are very effective in resisting seismic events due to the structural advantages of the smart SMA PR-CFT connections.
Author Address: Assistant Professor, Department of Civil and Environmental Engineering, College of Urban Science, University of Incheon, Incheon, 406-840, Republic of Korea