Numerical Analysis of a Self-centering Energy Dissipating Device Based on Shape Memory Alloy Bar

An innovative self-centering energy dissipating device based on shape memory alloy (SMA) bar was proposed. The material cyclic stretching tests on shape memory alloy bar were conducted to assess the superelastic capacity and energy dissipating capacity. Data from the piecewise linear pseudo-elastic constitutive model of SMA material established were compared with the test data in order to verify the vadility of the model. The theoretical model and the energy consumption principle were briefly described. Furthermore, numerical simulation test was carried out by the finite element analysis software. The results show that self-centering energy dissipating device has stable hysteresis capability under the cyclic loading. The energy consumption per unit cycle is high and the residual deformation small, presenting satisfying energy dissipating property and self-centering property.