Implementation and testing of passive control devices based on shape memory alloys

Abstract

Two families of passive seismic control devices exploiting the peculiar properties of shape memory alloy (SMA) kernel components have been implemented and tested within the MANSIDE project (Memory Alloys for New Seismic Isolation and Energy Dissipation Devices). They are special braces for framed structures and isolation devices for buildings and bridges. Their most important feature is their extreme versatility, i.e. the possibility to obtain a wide range of cyclic behaviour * from supplemental and fully re-centring to highly dissipating * by simply varying the number and/or the characteristics of the SMA components. Other remarkable properties are their extraordinary fatigue resistance under large strain cycles and their great durability and reliability in the long run. In this paper, the working mechanisms of the SMA based devices are outlined and the experimental tests carried out to verify the above-mentioned properties are extensively described.

Superelastic shape memory alloy flag-shaped hysteresis model with sliding response from residual deformation: Experimental and numerical study

“…earthquake or wind load) ceases. The hysteresis of the system was found similar to a flag-shaped hysteresis which closely matches with the hysteresis of the similar systems investigated by Dolce et al (2000) and Zhu and Zhang (2007).…”

“…In addition, in recent times, many structural systems have been developed using SMA wires and bars (Alam et al, 2007). SMA wires have been used mostly for steel braces (Dolce et al, 2000; Lafortune et al, 2007; Ma et al, 2004; Zhu and Zhang, 2007, etc.) and isolation devices (Dezfuli and Alam, 2013), and bars have been used for reinforced concrete bridge piers (Muntasir Billah and Alam, 2015; Saiidi and Wang, 2006), bridge restrainers (Alam et al, 2012; Andrawes and DesRoches, 2007), and concrete beam-column joints (Youssef et al, 2008).…”

“…However, not many self-centering systems are readily available in the market. So far researchers have developed numerous technologies in this field, such as Spring-Based Piston Bracing (SPB) (Issa and Alam, 2019), piston-based self-centering (PBSC) (Haque and ALAM, 2017), Self-Centering Energy Dissipation Device (SCED) (Tremblay and Christopoulos, 2012), Memory Alloys for New Seismic Isolation Devices (MANSIDE) (Dolce et al, 2000), Reusable Hysteretic Damping Brace (RHDB) (Zhu and Zhang, 2007), or the post-tensioned beam-column joints. Researchers have also developed base isolation systems with good self-centering capabilities (Dezfuli and Alam, 2013).…”

Seismic responses of steel frame structures with self-centering energy dissipation braced on shape memory alloy cables

“…Due to the excellent performances, different types of SMA dampers have been developed, and they were installed to the structures for enhancing the seismic performance (Clark et al, 1995; Dolce et al, 2000; Li et al, 2008; Ma and Yam, 2011; Miller et al, 2012; Ozbulut et al, 2011; Zhu and Zhang, 2007). For example, Zhu and Zhang (2007) developed a new SMA-based damper.…”

Hydraulic shape memory alloy shock absorber: Design, analysis, and experiments

“…The MANSIDE (Memory alloys for new seismic isolation and energy dissipation devices) project was a major program (Cardone et al, 2006; Dolce and Cardone, 2001a, 2001b; Dolce et al, 2000, 2005), in the study of SMA structural passive vibration control. The project developed energy dissipation devices based on NiTi SMA wires.…”