1. Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sciences, Shanghai 200032, China;
2. Tongji University, Shanghai 200092, China
Abstract：A new type of controlled frame-rocking wall structure form was proposed, in which the restraints were applied through SMA devices instead of the traditional implementation based on prestressing tendons. The V-shaped hinged support was installed between the wall and the foundation to realize the wagging and vertical support of the wall. Some energy-consuming connectors were installed between the rocking wall and the main frame to enhance the energy dissipation capacity. The seismic performance, failure mode and self-centering performance of compared frame structure and the frame-rocking wall structure using SMA device model were carefully investigated through the pseudo-static loading tests. Results showed that the stiffness and the bearing capacity of the controlled frame-rocking wall structure based on SMA device were improved significantly with the amplitude of 150% and 103%, respectively. The energy-dissipation connectors played important role in the ductility deformation, so that the hysteretic energy dissipation capacity of the structure was increased by 183%, and damage of the beam ends, column ends and beam-column joints was reduced effectively. The SMA device effectively achieved the preset working mechanism, which provided a certain restoring force for the resets of the rocking wall. The parameter matching between the rocking wall, the energy-dissipation connector and the SMA device needs further research.
