Experimental and analytical investigation on innovative hybrid shape memory alloys dampers for structural control

Hongnan Li; Hui Qian; Gangbing Song

doi:10.1117/12.776203

21 April 2008 Experimental and analytical investigation on innovative hybrid shape memory alloys dampers for structural control

Hongnan Li, Hui Qian, Gangbing Song

Author Affiliations +

Proceedings Volume 6928, Active and Passive Smart Structures and Integrated Systems 2008; 69282N (2008) https://doi.org/10.1117/12.776203
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

Abstract

Energy dissipation technique, relying on the absorption and dissipation of big amount of energy by devices, provides a very effective passive method of protecting structures from the hazard of earthquakes. An innovative hybrid damper combining friction device with superelastic shape memory alloy (SMA) wires was proposed. The most important property of the damper is the integration with stable energy dissipation capacity mostly provided by the friction device and re-centring feature profited from the superelastic pre-tensioned SMA wires. To investigate the mechanical behaviors of the damper as a function of pre-displacement, displacement amplitude and loading frequency, cyclic tensile tests on a scale model under various loading conditions were conducted. The effectiveness of the damper to reduce the seismic vulnerability of structures is assessed through nonlinear time history analysis on a steel frame with the innovative dampers subjected to representative earthquake ground motions. The experimental and analytical results show that the hybrid SMA damper has both the stable energy dissipating and recentring features with the hysteretic loop under cyclic loading-unloading, and it is effective in reducing the seismic response of structures.

Citation Download Citation

Hongnan Li, Hui Qian, and Gangbing Song "Experimental and analytical investigation on innovative hybrid shape memory alloys dampers for structural control", Proc. SPIE 6928, Active and Passive Smart Structures and Integrated Systems 2008, 69282N (21 April 2008); https://doi.org/10.1117/12.776203

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