铅芯橡胶支座微分型恢复力模型屈服前刚度的研究  

STUDY ON PRE-YIELD SHEAR STIFFNESS OF DIFFERENTIAL RESTORING FORCE MODEL FOR LEAD RUBBER BEARING

作　　者：金建敏[1,2] 周福霖[2] 谭平[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]广州大学工程抗震研究中心,广东广州510405

出　　处：《工程力学》2010年第10期7-13,共7页Engineering Mechanics

基　　金：国家自然科学基金重点项目(90815027);减震控制与结构安全开放实验室开放基金

摘　　要：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。The paper introduces the development of differential restoring model （Bouc-Wen model） and its application in lead rubber bearing. Based on the compression-shear tests of two different LRBs, the differential restoring force model with various pre-yield shear stiffness ranging from 5Kd to 40Kd is considered and compared with the experimental results, and some important conclusions can be drawn from the results. An isolated eight-story super-structure is used as the numerical example. Its pre-yield shear stiffness of the LRB is chosen to be 10Kd and 40Kd, meanwhile the stiffness of the bottom floor of the super-structure is 100Kd, 300Kd and 500Kd for different shear pre-yield stiffness of the LRB. Thus the effect of different pre-yield shear stiffness on the structure with various natural periods can be considered and compared. Finally, a reasonable value of the pre-yield shear stiffness of the lead rubber bearing is given for the design of isolated buildings.

关 键 词：铅芯橡胶支座 微分型恢复力模型 压剪试验 屈服前刚度 隔震设计 

分 类 号：TU352.1[建筑科学—结构工程]