高阻尼隔震橡胶支座性能试验研究

Test and Research on Mechanical Performance of High Damping Isolation Rubber Bearing

为了研究高阻尼隔震橡胶支座的水平力学性能相关性,通过反复加载试验的方法,进行了剪应变相关性、压应力相关性、温度相关性、反复加载次数相关性试验,并对各因素对水平等效刚度、等效阻尼比的影响进行分析。结果表明,水平等效刚度、等效阻尼比随剪应变、温度、反复加载次数的增加呈下降趋势,且50次循环加载导致的橡胶温度升高影响不能忽略不计;等效阻尼比随压应力的增加呈上升趋势;压应力对水平等效刚度影响不大。

In order to study the dependency of horizontal mechanical properties of high damping isolation rubber bearing, the cyclic loading method is adopted to study the hear-strain dependency tests, including compressive stress dependency, temperature dependency, and repeated loading dependency. The effects of the corresponding factors on horizontal equivalent shear stiffness and equivalent damping ratio are researched. The results show that horizontal equivalent shear stiffness and equivalent damping ratio decline with the increasing of shear strain, temperature and repeated loading, and the temperature increasing in rubber cannot be ignored; equivalent damping ratio increases with increasing of compressive stress; and compressive stress effect on equivalent damping ratio cannot be found.