Novel semi-active magnetorheological seismic isolators that may be used in buildings and bridges to minimize structural damage during an earthquake.
Researchers at the University of California, Irvine have developed a novel semi-active magnetorheological seismic isolator. This new isolator is composed of magnetorheological nanocomposites embedded between two steel plates. The magnetorheological nanocomposites incorporate multi-walled carbon nanotubes which enhances the performance of the isolator. Two steel yoke supports two coils which may be controlled to generate a magnetic field to change the stiffness of the magnetorheological nanocomposites. During an earthquake, sensors activate the semi-active isolators to adjust their stiffness to isolate the building or bridge in which it is embedded.
These novel isolators may be used to reduce seismic damage in building and bridges.
Unlike passive isolators, semi-active isolators have shown to use less energy and may be powered by batteries. Traditional semi-active isolators utilize fluids and they take up more space.
|United States Of America||Issued Patent||9,581,214||02/28/2017||2013-923|
A prototype has been made and its dynamic mechanical behavior has been characterized.