Effect of hysteretic properties of SMAs on seismic behavior of self-centering concentrically braced frames

• DOI: 10.1002/stc.2110
• Publication Date: 2017-10-16T08:52:36Z
• Authors: Hetao Hou; Han Li; Canxing Qiu; Yichen Zhang
• Keywords: Bracing; Braced frame

Shape memory alloys (SMAs) exhibit nearly ideal superelastic properties when the ambient temperature is above austenite finish temperature, which enables them to recover deformation and dissipate energy for seismic-resisting structures. This unique hysteretic of SMAs indicate they are very promising in developing self-centering As such, recent studies installed concentrically braced frames (CBFs) form SMA-based CBFs (SCCBFs) illustrated that structures performed excellently with controlled peak drift eliminated residual upon earthquakes. show variability parameters due difference metal types, crystallographic structure, component ratios, heating treatments producing process. Thus, this necessitates an investigation into associated effect on seismic performance SCCBFs. To end, study selects 3 SMAs, proposes a bracing form, installs SMA braces CBFs. Prior analysis, all designed by ad hoc design method. The focus paper understand behavior Intensive nonlinear time history analyses carried out assess these under frequently occurred earthquakes basis analytical results properly SCCBFs able meet prescribed targets display comparable demands, irrespective types. suggests using greater more favorable, from perspective saving material consumption controlling acceleration demands.