位移放大型黏滞阻尼装置的减震效果研究

Study on the Damping Effect of Displacement Amplification Viscous Damping Device

为解决普通黏滞阻尼器性能在层间位移较小的结构或位置难以得到充分发挥的问题,提出一种基于杠杆原理将位移和速度放大的黏滞阻尼装置,该装置通过放大普通黏滞阻尼器两端的相对位移,进而放大相对速度,使阻尼器性能得以充分发挥,更好地达到降低结构地震响应的效果。以某实际工程结构为背景,通过SAP2000有限元软件建立有限元模型,分析原结构、附加普通黏滞阻尼器结构和附加放大型黏滞阻尼器结构在3条地震波作用下的地震响应。结果表明,在3条地震波作用下,相较于附加普通筒式黏滞阻尼器结构,附加放大型黏滞阻尼器结构的层间位移角和基底剪力降低幅度均较大,说明放大型黏滞阻尼器相较于普通黏滞阻尼器有更好的减震效果。

In order to solve the problem that the performance of the ordinary viscous damper is difficult to be fully utilized in the structure or position with small inter-story displacement,a viscous damping device based on the lever principle is proposed to amplify the displacement and velocity.The device amplifies the relative displacement at both ends of the ordinary viscous damper,and then amplifies the relative velocity,so that the damper performance can be fully utilized,and the effect of reducing the seismic response of the structure can be better achieved.Taking a practical engineering structure as the background,the finite element model is established by SAP2000 finite element software to analyze the seismic response of the original structure,the structure with additional ordinary viscous damper and the structure with additional large viscous damper under three seismic waves.The results show that under the action of three seismic waves,compared with the structure with ordinary cylindrical viscous dampers,the interlayer displacement angle and base shear force of the structure with additional enlarged viscous dampers are greatly reduced,indicating that the enlarged viscous dampers have better damping effect than the ordinary viscous dampers.