TY - JOUR
T1 - Shape memory alloy plates
T2 - Cyclic tension-release performance, seismic applications in beam-to-column connections and a structural seismic demand perspective
AU - Zhou, Xuhong
AU - Ke, Ke
AU - Yam, Michael C.H.
AU - Zhao, Qingyang
AU - Huang, Yun
AU - Di, Jin
N1 - Funding Information:
This research is financially supported by the Research Grants Council of the Hong Kong Special Administrative Region , China with Grant No. PolyU 152096/19E and National Natural Science Foundation of China (Grant No. 51890902 and 51708197 ). The constructive comments by the two anonymous reviewers are sincerely appreciated. The corresponding author would like to thank the constant support from his beloved wife Siqin, his daughter Yutong and all his families, particularly in this hard period.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10
Y1 - 2021/10
N2 - This study examined the hysteretic behaviour of commercial Shape Memory Alloy (SMA) plates to promote their seismic applications in beam-to-column energy dissipation connections, and the research focus was given to the cyclic tension-release behaviour. Based on a series of SMA plate specimens, the investigation was commenced by examining the thermal characteristics, and the phase transformation behaviour of the SMA plates was characterised. Subsequently, cyclic tension-release tests of the SMA plates were conducted in the laboratory at room temperatures, and multi-phase tests considering varied loading protocols were carried out. It was observed that the self-centring capability of the SMA plates was comparatively less encouraging than bars and wires examined in the literature, whereas training cycles enabled stabilisation of the behaviour of the specimens by producing a newly recentring strain range with increased post-yield behaviour and decreasing martensite transformation stress. However, the energy dissipation of the SMA plates was reduced after experiencing the training protocols. Following the test programme, detailed numerical models of novel beam-to-column energy dissipation connection equipped with SMA plates were developed, and the feasibility of exploiting the cyclic behaviour of SMA plates was confirmed. Nonlinear spectral analyses of single-degree-of-freedom (SDF) systems representing structures were analysed to examine the influence of the structural hysteretic parameters on the structural inelastic demands quantified by strength reduction factor, and the influence of hysteretic parameters of the SMA plates on the structural seismic demand was characterised.
AB - This study examined the hysteretic behaviour of commercial Shape Memory Alloy (SMA) plates to promote their seismic applications in beam-to-column energy dissipation connections, and the research focus was given to the cyclic tension-release behaviour. Based on a series of SMA plate specimens, the investigation was commenced by examining the thermal characteristics, and the phase transformation behaviour of the SMA plates was characterised. Subsequently, cyclic tension-release tests of the SMA plates were conducted in the laboratory at room temperatures, and multi-phase tests considering varied loading protocols were carried out. It was observed that the self-centring capability of the SMA plates was comparatively less encouraging than bars and wires examined in the literature, whereas training cycles enabled stabilisation of the behaviour of the specimens by producing a newly recentring strain range with increased post-yield behaviour and decreasing martensite transformation stress. However, the energy dissipation of the SMA plates was reduced after experiencing the training protocols. Following the test programme, detailed numerical models of novel beam-to-column energy dissipation connection equipped with SMA plates were developed, and the feasibility of exploiting the cyclic behaviour of SMA plates was confirmed. Nonlinear spectral analyses of single-degree-of-freedom (SDF) systems representing structures were analysed to examine the influence of the structural hysteretic parameters on the structural inelastic demands quantified by strength reduction factor, and the influence of hysteretic parameters of the SMA plates on the structural seismic demand was characterised.
KW - Cyclic behaviour
KW - Dynamic analysis
KW - Seismic engineering
KW - Shape memory alloy plate
UR - http://www.scopus.com/inward/record.url?scp=85111326608&partnerID=8YFLogxK
U2 - 10.1016/j.tws.2021.108158
DO - 10.1016/j.tws.2021.108158
M3 - Journal article
AN - SCOPUS:85111326608
SN - 0263-8231
VL - 167
JO - Thin-Walled Structures
JF - Thin-Walled Structures
M1 - 108158
ER -