负刚度摩擦阻尼装置的开发及应用研究

消能减震技术通常需要在多个楼层布置减震装置才能有效降低结构的地震响应,占用了较多的结构空间。针对此种问题提出在底部楼层布置负刚度阻尼装置的减震方案,形成力学上的隔震层,用减震实现类似隔震的效果,以减少阻尼器的布置数量。为实现该减震方案,研发了一种基于氮气弹簧的负刚度摩擦阻尼装置,该装置具有行程大,力学性能稳定等优点。性能试验验证了负刚度摩擦阻尼装置可以实现具有负刚度特征的滞回模型,对负刚度摩擦阻尼装置布置于底部楼层的减震方案进行了模拟分析,结果表明仅在底层布置负刚度阻尼装置可以获得理想的减震效果。

Development and application of a negative stiffness friction damping device

The conventional technology of energy dissipation and shock absorption requires the layout of shock absorption devices installed on multiple floors to effectively reduce the seismic response of a structure,which occupies more structural space.Thus,a negative stiffness device was proposed to be arranged on the lower floor of the structure which formed a mechanically isolated layer to reduce the quantity of dampers and achieved the similar isolation effect by virtue of proper friction damping components.A kind of negative stiffness friction damping device was designed and developed.It has the advantages of large stroke and stable mechanical properties.The performance test verifies that the negative stiffness friction damping device can realize the hysteretic model with negative stiffness.The simulation analysis of the damping scheme shows that if only the device is placed on the bottom floor,the negative stiffness damping device can obtain an ideal damping effect.