Steel Reinforced Elastomeric Bearings (SREB) are mostly designed and used for providing different supporting conditions under service loads; while recent studies have shown remarkable characteristics which help them as a cost-effective isolation system. However, little investigation has been carried out to indicate the influence of parameters affecting the mechanical properties of the bearings under large shear deformations (i.e., the seismic performance as an isolation system). A comparative parametric study was conducted herein through finite element modeling of SREBs. The implemented model was also verified by experimental test results. The hysteretic behavior was studied in both cases of bounded and unbounded, and under shear strains up to 125% of the bearing’s total rubber height, which is far beyond that of service-load induced strains. Effects of critical parameters like shape factor, Shim thickness and vertical loading level were investigated. Meanwhile, the horizontal stiffness was kept constant to allow a rational comparative study. It was shown that shape factor and vertical load level have notable influence on the effective stiffness and equivalent viscous damping of the bearings. Ruptures were also seen in steel shims of both bounded and unbounded SREBs, which were categorized in flexural and slicing ruptures. Eventually, a bilinear model was derived from the finite element analyses results to predict the hysteretic behavior of SREBs, while considering the interactive effect of both shape factor and compressive stress. The proposed model can simply be implemented in macro modeling.

钢增强弹性轴承（SREB）的设计和使用主要是为了在使用载荷下提供不同的支撑条件。而最近的研究显示出显着的特性，可以帮助他们成为具有成本效益的隔离系统。但是，很少有研究表明在大的剪切变形（即作为隔离系统的抗震性能）下，影响轴承机械性能的参数的影响。本文通过SREB的有限元建模进行了比较参数研究。实验测试结果也验证了所实现的模型。在有界和无界两种情况下都研究了滞回性能，在剪切应变下，轴承的总橡胶高度高达125％，远远超出了工作载荷引起的应变。研究了形状系数，垫片厚度和垂直载荷水平等关键参数的影响。同时，水平刚度保持恒定以进行合理的比较研究。结果表明，形状系数和垂直载荷水平对轴承的有效刚度和等效粘性阻尼有显着影响。在有边界和无边界SREB的钢垫片中也发现了断裂，这些断裂分为弯曲断裂和切片断裂。最终，在考虑形状因子和压应力相互作用的同时，从有限元分析结果推导出双线性模型来预测SREB的滞后行为。所提出的模型可以简单地在宏建模中实现。研究了垫片厚度和垂直载荷水平。同时，水平刚度保持恒定以进行合理的比较研究。结果表明，形状系数和垂直载荷水平对轴承的有效刚度和等效粘性阻尼有显着影响。在有边界和无边界SREB的钢垫片中也发现了断裂，这些断裂分为弯曲断裂和切片断裂。最终，在考虑形状因子和压应力相互作用的同时，从有限元分析结果推导出双线性模型来预测SREB的滞后行为。所提出的模型可以简单地在宏建模中实现。研究了垫片厚度和垂直载荷水平。同时，水平刚度保持恒定以进行合理的比较研究。结果表明，形状系数和垂直载荷水平对轴承的有效刚度和等效粘性阻尼有显着影响。在有边界和无边界SREB的钢垫片中也发现了断裂，这些断裂分为弯曲断裂和切片断裂。最终，从有限元分析结果中得出了一个双线性模型，以预测SREB的滞回特性，同时考虑了形状因子和压应力的相互作用。所提出的模型可以简单地在宏建模中实现。结果表明，形状系数和垂直载荷水平对轴承的有效刚度和等效粘性阻尼有显着影响。在有边界和无边界SREB的钢垫片中也发现了断裂，这些断裂分为弯曲断裂和切片断裂。最终，从有限元分析结果中得出了一个双线性模型，以预测SREB的滞回特性，同时考虑了形状因子和压应力的相互作用。所提出的模型可以简单地在宏建模中实现。结果表明，形状系数和垂直载荷水平对轴承的有效刚度和等效粘性阻尼有显着影响。在有边界和无边界SREB的钢垫片中也发现了断裂，这些断裂分为弯曲断裂和切片断裂。最终，在考虑形状因子和压应力相互作用的同时，从有限元分析结果推导出双线性模型来预测SREB的滞后行为。所提出的模型可以简单地在宏建模中实现。从有限元分析结果导出双线性模型，以预测SREB的滞回行为，同时考虑形状因子和压应力的相互作用。所提出的模型可以简单地在宏建模中实现。从有限元分析结果导出双线性模型，以预测SREB的滞回行为，同时考虑形状因子和压应力的相互作用。所提出的模型可以简单地在宏建模中实现。