ABSTRACT

To improve the isolation property of conventional-coned disc spring isolation (CDSI) bearings, novel coned-disc spring compound vertical isolation (CDSCI) bearings were proposed. These combined the conventional CDSI bearings with high–damping viscoelastic (HDV) layers. Static loading tests, dynamic loading tests, and temperature dependence tests were conducted to study the mechanical performance of the CDSCI bearings. The test results indicated that HDV layers can enhance the conventional CDSI bearings’ energy-dissipation capacity effectively; the preloading displacement has a positive correlation relationship with the equivalent damping ratio and equivalent stiffness of the CDSCI bearings; and the dynamic loading amplitude has a negative correlation with the equivalent damping ratio of the CDSCI bearings, while it has a positive correlation relationship with the equivalent stiffness. As the ambient temperature increases, the equivalent damping ratio and equivalent stiffness of the CDSCI bearing decrease. Furthermore, the mechanical behavior of the CDSCI bearing was simulated using a modified Bouc–Wen model. Last, seismic responses of a typical CDSCI-isolated structure was investigated using time history analysis. Numerical results show that force responses of a structure can be reduced by CDSCI bearings effectively.

摘要

为提高传统锥形盘簧隔振（CDSI）轴承的隔振性能，提出了新型锥形盘簧复合垂直隔振（CDSCI）轴承。它们将传统的 CDSI 轴承与高阻尼粘弹性 (HDV) 层相结合。进行静态负载测试、动态负载测试和温度依赖性测试以研究 CDSCI 轴承的机械性能。试验结果表明，HDV层能有效提高常规CDSI轴承的消能能力；预紧位移与CDSCI轴承的等效阻尼比和等效刚度呈正相关关系；动载荷幅值与CDSCI轴承的等效阻尼比呈负相关，而与等效刚度呈正相关关系。随着环境温度的升高，CDSCI轴承的等效阻尼比和等效刚度降低。此外，CDSCI 轴承的机械性能使用改进的 Bouc-Wen 模型进行了模拟。最后，使用时程分析研究了典型 CDSCI 隔离结构的地震响应。数值结果表明，CDSCI轴承可以有效地降低结构的力响应。使用时程分析研究了典型 CDSCI 隔离结构的地震响应。数值结果表明，CDSCI轴承可以有效地降低结构的力响应。使用时程分析研究了典型 CDSCI 隔离结构的地震响应。数值结果表明，CDSCI轴承可以有效地降低结构的力响应。