Base isolation system with shape memory alloy device for elevated highway bridges

A velocity based active vibration control of hysteretic systems

“…Case 4 ( Figure 3) shows a type of behavior often seen in electrical substations [9]. Finally, in Case 5 (Figure 4), the passive function g(z) captures the Stribeck effect as in [20] and [21]. The above hysteretic loops cannot be reproduced with the original Bouc-Wen model.…”

Semi-Active Control of Concrete Building Frames using Smart Cables of Shape Memory Alloys

“…The Graesser-Cozzarelli model [11] was extended by Wilde et al [3] to include the hardening behaviour of SMA materials after the transition from austenite to martensite phase is completed. The stress-strain relation of the extended hysteretic model of Ni-Ti Shape Memory Alloy is shown in Fig.…”

“…Previously reported applications of SMAs in structural base isolation include implementation of SMA bars for base-isolation of highway bridges [3], and SMA wire re-centering devices for buildings [4]. The SMAs have been implemented as passive energy dissipation devices in braces for framed structures [5,6,7], in dampers for cable-stayed bridges [8] and in connection elements for columns [9].…”

Dynamic Numerical Simulation of Steel Frame-Typed Piers Installed With Sma Damping Devices Based on Multi-Linear One Dimensional Constitutive Model

“…Besides models generated from experiment results Delemont and DesRoches [10], many models were derived through different theoretical approaches. For examples, Graesser and Cozzarelli proposed a model based on one strain variable ε Graesser and Cozzarelli [11], which later modified by Wilde et al [3] and Zhu and Zhang [5]. A class of thermo-mechanical models with assumed phase transformation kinetics was firstly proposed by Tanaka [12], in which an internal variable ξ was used to represent the martensite volumetric fraction.…”

“…For examples, two families of passive seismic control devices, i.e., special frame braces and isolation devices for buildings and bridges, were implemented within the MANSIDE project Dolce et al [2]. A smart isolator combined by a laminated rubber bearing with a SMA device was proposed for bridge protection Wilde et al [3]. Novel SMA-based devices were also present by Li et al [4], Zhu and Zhang [5,6], Song et al [7], McCormick et al [8], etc., on which experiments, numerical models and applications were investigated but most of them were still in laboratory stage.…”