一种新型三维隔震支座的试验研究

摘要

The intention of this paper is to research the mechanical properties relationship between the three-dimensional isolation bearing and the two-dimensional isolation bearing. The new disc spring transformed from the traditional one consists of the vertical isolation bearing by a stacking way. And the vertical isolation bearings and the LNR are combined into a novel three-dimensional isolation bearings. Tests about the horizontal and vertical mechanical properties of the LNR, the disc spring vertical isolation bearing and the 3D isolation bearing were carried out respectively. Analyses were conducted on the relationship of the mechanical properties between the 2D isolation bearings and the 3D isolation bearings under independent conditions. Test results show that the vertical stiffness of the disc spring vertical isolation bearing varies linearly with the increase of compressive stress. And the frequency has little effect on the vertical stiffness of that at low frequencies. The horizontal stiffness of the 3D isolation bearing is slightly lower than that of LNR in the independent state.The effect of LNR on the overall vertical stiffness of 3D isolation bearings is not significant.%通过研究三维隔震支座与二维隔震支座力学性能的相关关系,对传统的蝶形弹簧改进,并将改进后的新型蝶形弹簧通过对合叠合的方式组成蝶形弹簧竖向隔震支座,与普通橡胶支座通过串联的方式组合成一个新型的三维隔震支座.对二维天然隔震橡胶支座(LNR)、碟形弹簧竖向隔震支座、三维隔震支座分别进行了水平方向和竖向力学性能试验,分析了独立状态下的二维隔震支座与三维隔震支座相互之间力学性能的关系,并对其规律进行了归纳和总结.试验结果表明:竖向弹簧片支座的竖向刚度随压应力的增加呈线性变化;在低频率情况下频率对其竖向刚度影响不大;三维隔震支座的水平刚度相对于独立状态下的LNR会略有降低;LNR对三维隔震支座的整体竖向刚度的影响不大.