（北京工业大学空间结构研究中心， 北京 100124）

［摘要］对适用于大跨空间结构的碟簧-叠层橡胶三维复合隔震支座进行隔震性能试验研究，该支座由叠层橡胶与下部碟簧装置串联组成。水平方向，试验测试了简谐波激励下支座的滞回性能，考察了剪应变、竖向压力及加载频率对其水平力学性能的影响；竖直方向，对支座的等效刚度及等效阻尼比进行试验研究，考察了加载幅值、预压力及加载频率对其竖向滞回性能的影响，同时考察竖向刚度的变化对叠层橡胶支座水平力学性能的影响。结果表明，三维复合隔震支座在水平及竖向均有较好的滞回性能，水平方向等效阻尼比在0.07～0.11之间，其值随着竖向压力的增加而增大；竖向等效阻尼比在0.1～0.2之间，竖向加载频率对其影响不大；竖向刚度的降低使支座的水平等效刚度、等效阻尼比增加。

［关键词］碟簧叠层橡胶三维复合隔震支座；滞回试验；等效阻尼比；等效刚度

中图分类号：TU352-1文献标识码：A文章编号：1002-848X(2021)08-0014-07

Experiment study on the mechanical performance of disc spring-laminated rubber three-dimensional composite vibration isolation bearing

LI Xiongyan, LIANG Shuanzhu, XUE Suduo, GAO Jiayu

(Spatial Structures Research Center, Beijing University of Technology, Beijing 100124, China)

Abstract:An experimental study was conducted on the seismic isolation performance of the disc spring-laminated rubber three-dimensional composite vibration isolation bearing, which is composed of laminated rubber  and lower disc spring devices in series. In the horizontal direction, the hysteretic performance of the bearing under simple harmonic excitation was tested, and the effects of shear strain, vertical pressure and loading frequency on its horizontal mechanical properties were investigated. In the vertical direction, the equivalent stiffness and equivalent damping ratio of the support were tested, and the effects of variation of loading amplitudes, pre-pressures and loading frequency on its vertical hysteretic performance were investigated as well. Meanwhile, the effects of changes in the vertical stiffness on the horizontal mechanical performance of the laminated rubber support were tested as well. It is shown that the three-dimensional composite vibration isolation bearing shares good hysteretic performance in both horizontal and vertical directions, and the equivalent damping ratio in horizontal direction is between 0.07 and 0.11, and it will be increased with the increasing of vertical pressure. The vertical equivalent damping ratio is from 0.1 to 0.2. The reduction of the vertical stiffness led to enlarge the value of the horizontal equivalent stiffness and equivalent damping ratio of the bearing.

Keywords:disc spring-laminated rubber three-dimensional composite vibration isolation bearing;hysteresis test;equivalent damping ratio;equivalent stiffness

*国家重点研发计划课题（2016YFC0701103），国家科学自然基金（51278008）。

作者简介：李雄彦，博士，教授，Email：xiongy2006@126.com；

通信作者：梁栓柱，硕士，Email：lszbjut@126.com。