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该文简介了微分型恢复力模型(Bouc-Wen模型)的发展过程及其在铅芯橡胶支座中的应用,基于两个不同规格支座的压剪试验比较了不同屈服前刚度K1(K1=5Kd―40Kd)的微分型恢复力模型与实测结果的差异,发现了一些有益的规律。之后,计算分析了一个上部结构为8层的隔震模型,铅芯橡胶支座屈服前刚度K1分别取10Kd―40Kd,对于不同的屈服前刚度K1,上部结构底层的水平刚度分别设为100Kd、300Kd、500Kd,用以比较屈服前刚度K1对不同周期结构的地震响应的影响。通过以上对比和计算,对隔震设计中铅芯橡胶支座屈服前刚度的取值给出了合理建议。
In this paper, the development process of the differential restoring force model (Bouc-Wen model) and its application in the lead rubber bearing are briefly introduced. Based on the compression-shear tests of two different supports, the stiffness before buckling K1 = 5Kd-40Kd) differential recovery model and measured the difference between the results and found some beneficial laws. After that, an isolation model with 8 stories of superstructure was calculated and analyzed. The pre-yield stiffness K1 of lead rubber bearing was taken as 10Kd-40Kd respectively. For different pre-yield stiffness K1, the horizontal stiffness of the superstructure was 100Kd, 300Kd, 500Kd, to compare the effect of pre-yield stiffness K1 on the seismic response of different periodic structures. Through the above comparison and calculation, the reasonable pre-yield stiffness of lead-rubber bearings in isolated design is given.