多级变频复合摩擦摆-隔震支座的力学性能和隔震效果研究  

RESEARCH ON MECHANICAL PROPERTIES AND ISOLATION EFFECT OF A ISOLATION BEARING WITH MULTI-STAGE FREQUENCY-CONVERSION COMPOSITE FRICTION PENDULUMS

作　　者：杨海旭[1] 朱峰 王海飙[1] 石明 史心如 YANG Haixu;ZHU Feng;WANG Haibiao;SHI Ming;SHI Xinru(School of Civil Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040

出　　处：《工业建筑》2020年第6期71-78,110,共9页Industrial Construction

基　　金：中央高校基本科研业务经费专项资金项目(2572018BJ01);国家级大学生创新项目(201910225131);国家自然科学基金面上资助项目(51878130)。

摘　　要：为避免摩擦摆隔震结构与上部结构发生共振破坏,研制出具有变曲率变摩擦系数圆弧滑动面的多级变频摩擦摆隔震支座。在阐述其力学性能和隔震机理的基础上,通过动力平衡方程分析得出该多级变频摩擦摆隔震支座的自振周期只与该摩擦摆摩擦系数μ、弧面半径R及摩擦摆水平限度位移有关。加工出实体模型,通过试验测试其恢复力模型和摩擦系数等力学性能;采用ABAQUS有限元软件对一栋安装此隔震支座的6层框架结构进行模拟分析,对比在地震作用下,隔震前后结构的动力响应。研究表明:多级变频摩擦摆具有良好的稳定性、变频能力、自限及自复位能力,且适应多级隔震,无需单独设置阻尼器,结构简单,应用方便,隔震效果良好。In order to avoid the resonance damage of the friction pendulum isolation structure and the upper structure,a multi-stage frequency conversion friction pendulum isolation bearing with a variable curvature and friction coefficient arc sliding surface was developed.The mechanical properties and isolation mechanism were expounded.The theoretical analysis of the dynamic equilibrium equation showed that the natural vibration period of the multi-stage frequency conversion friction pendulum isolation bearing was only related to the friction coefficientμof the frictional pendulum,the radius of the arc surface R and the horizontal displacement of the friction pendulum.The solid model was made,and the mechanical properties such as the restoring force model and friction coefficient were tested by experiments.The ABAQUS finite element software was used to simulate a 6-story frame structure set up by this isolation bearings.The dynamic responses of the structure under earthquake action before and after installing isolator were compared.The research showed that the multi-stage frequency conversion friction pendulum had good stability,frequency conversion capability,self-limiting and self-restoring capacity,and was suitable for multi-stage isolation scheme,which did not need to be equipped with a separate damper.The multi-stage frequency conversion friction pendulum showed the advantages of simple structure,convenient application and good isolation effect.

关 键 词：摩擦摆 变频 隔震支座 恢复力模型 隔震性能 

分 类 号：TU352.12[建筑科学—结构工程]