超弹性本构模型在隔震支座设计中的适用性研究

Research on Applicability of Superelastic Constitutive Model to Isolation Bearing Design

通过对Mooney-Rivlin本构和Ogden本构进行研究,得出2种典型超弹性本构模型在辅助隔震橡胶支座设计分析中的适用性,并对2种本构模型进行隔震橡胶支座竖向刚度和水平刚度模拟。结果表明:工程应变小于1.33时可选择Mooney-Rivlin本构模型;工程应变在1.33与4之间可选择Ogden本构模型;Mooney-Rivlin本构模拟隔震橡胶支座的竖向压缩与Ogden本构模拟隔震橡胶支座水平剪切刚度均与试验结果吻合较好。

Two typical superelastic constitutive models, Mooney-Rivlin and Ogden, were studied in regard to their applicability to the design of rubber isolation bearings. Simulation of vertical and horizontal stiffness was conducted on the aforementioned models. The results show that the Mooney-Rivlin model is applicable when the engineering strain is less than 1.33, while the Ogden model shall be chosen when the engineering strain ranges from 1.33 to 4; both the simulation of vertical compression of rubber isolation bearing with the Mooney-Rivlin model and simulation of horizontal shear stiffness with the Ogden model are consistent with test results.