In order to ensure that the damper can still exert good energy dissipation capacity when the input displacement is small,a displacement amplified friction damper based on gear transmission was designed.The influence of displacement amplitude on the hysteretic performance of the damper was studied through tension compression cyclic mechanical tests.It pointed out that the hysteretic curve of displacement amplified friction damper was full,and its output force was that of ordinary friction damper η times(η is the ratio of the diameter of the big gear and the small gear),so the energy consumption is stronger.Taking a six story regular steel frame structure as an example,the seismic responses of uncontrolled structure,ordinary friction damper damping structure and displacement amplified friction damper damping structure were calculated.The results show that compared with ordinary friction damper,displacement amplified friction damper can better control the inter story displacement angle and vertex displacement of the structure,but their control effects on the base shear force of the structure are similar.
关键词
位移放大型摩擦阻尼器/力学试验/滞回性能/减震控制
Key words
displacement amplified friction damper/mechanical test/hysteretic behavior/damping control
维普
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