基础隔震能够有效地降低建筑物在地震中受到的破坏,在维持结构正常使用的同 时保护人们的生命与财产安全隔震装置将建筑基础和上部结构分开,减小了地震作 用,改变了传统结构依赖增加自身结构的强度和刚度来抵抗地震作用的抗震模式本 文研究一种新的隔震结构)椭球体滚动基础隔震结构 本文的主要研究内容有包括以下几个方面: (1)在对隔震体系进行一系列的调研工作后总结出隔震原理并对几种已有的隔 震结构做出对比分析,说明了当前隔震体系所面临的问题阐述了一系列有复位功能 的隔震体系,并进行性能的隔震分析对比,得出它们的优缺点 (2)提出本文所研究的椭球体滚动基础隔震结构的特点,以及本文研究的方向与 重点说明椭球体滚动基础隔震技术的工程设计及施工中需要注意的问题 (3)提出椭球体滚动基础隔震体系的计算原理及模型;得出结构计算的单向及双 向运动微分方程计算这种隔震结构在简谐波作用下的响应,对三种参数的椭球体的 单向及双向运动计算,将结果进行对比分析,发现这种隔震结构的减震是很明显的 (4)利用MATLAB编程并结合SIMUL创K仿真技术来分析求解椭球体滚动基础 隔震结构动力方程采用三种地震波,对工程实例进行验证计算分析结合模拟计算 分析结果,认为椭球体滚动基础隔震方法对中低层结构有很大的实用性 关键词:椭球体,滚动隔震,SIMULINK,时程分析法 脚Abstract Baseisolationcandeereasethedamagesmadebyearthquakesveryeffieiently,andProteetPeoPle,s livesandProPerties,safewhilekeePingthestrueture,5usability.BaseisolationdevieescanseParatethe baseandtheuPPerPartofthestrueture;50thatiteanredueetheearthquakeresPonseandhaveehanged thetraditionalseismiemodel,whiehredueestheearthquakeresPonsejustdePendingonimProving stiffnessandstrengthofthestrueture.TherubberbearingsbaseisolationsystemsuggestedbyThe NationalSeismieCodeeannotPutintoPraetieewidelyforitshighcostandcomPlieatedteelmiques.In thisP叩erwewilldiseussatyPebaseisolationsystem:elliPtiealrollingrodsbaseisolationsystem. Themaineo爪entsofthisdissertation肚elisted韶follows: (l)Afteranalyzingtraditionalbaseisolationsystems,wegetthethesisofbaseisolation,即dProPose somebaseisolationsystemstomakeeontracts,inordertomakesuretheexistedbaseisolationsystems, Problems.W七Putforwardaseriesofbaseisolationsystemswithself-reeoveryfunetion,andgettheir advantagesanddisadvantages. (2)ThenweanalyzetheneeessitiesandsuPerioritiesofelliPtiealrollingrodsbaseisolationsystem, whiehwillbediseussedinthisthesis,tomakesuretheresearehasPectsandkeyPoints.wesuggest somethingthatneedstobenotedontheProjeetdesigningandtheteehniqueimPlementing. (3)W七makesimulationanalysisoftheuPPerPartofthestruetorewithelliPtiealrollingrodsbase isolationsystemandgettheeomPutingmodelandthedifferentialequationofboththeone一wayand two一Was.AftereomPutingthestrueture,5responsewithbaseisolationsystemunderseveraldifferent simPleharmoniewavewhileehangingtheelliPtiealrollingrods,sizesforthreetimes,wefindtheeffeets ofthisbaseisolationsystemareveryobvious. (4)WePutforwardthemethodsofutiIizingtheMATLABProgrammingandsolvingthekinetie equationofelliPticalrollingrodsbaseisolationsystem.WemakeProgralnsandmake一ealeulationand verificationofthePractiealProjeet.FromtheanalogeomPutationresult,wefindtheelli排iealrolling rodsbaseisolationsystemhasgreataPPlieability. Keywords:elliPsoid,rollingrodsbaseisolation,SIMULINK,timehistoryanalysis II目录 第一章绪论............................................................................................................ ,q .1工程抗震的现状 2隔震的工作原理 1.3基础隔震的发展历史...................................................................................4 1.4常见的几种基础隔震.......................................................6 1.4.1叠层橡胶垫隔震体系........................................................................6 1.4.2摩擦滑移隔震体系.....................................................#.#8 1.4.3复合基础隔震体系...................................................#.....#10 1.4.4悬挂隔震体系.............................................................#...#10 1.4.5其他隔震体系...........................................#..11 1.5基础隔震的发展现状...............................................................,...........11 1.6本文研究的内容及方法.............................................................................12 第二章既有滚动隔震装置简介及本文隔震装置提出..........................................15 2.1球形滚动隔震系统的特点.........................................................................巧 2.2目前各国隔震设计规范法规及抗震设计原理.........................................16 2.2.1目前国外已有的隔震建筑设计规范..............................................16 2.2.2我国规范采用的隔震结构设计方法中存在的问题......................17 2.3本文提出的椭球体滚动基础隔震结构体系.............................................18 2.4椭球体滚动隔震结构的设计要求.!,.,............................................19 2.5本章小结................................................................................................#....21 第三章椭球体滚动基础隔震结构的数值计算......................................................23 3.1基础隔震技术的原理及计算方法.............................................................23 3.2椭球体滚动基础隔震体系模型的建立.....................................................24 3.2.1隔震装置的位移计算......................................................................24 3.2.2X向运动微分方程的建立...............................................................26 3.2.3考虑双向平动的运动微分方程.........................................,......28 3.3输入简谐波时隔震结构效果检验.............................................................29 3.3.1椭球体滚动基础隔震在简谐波下的单向反应............................!.30 犷3.3.2椭球体滚动基础隔震在简谐波下的双向反应..............................31 3.4本章小结...................................................................................,...........32 第四章MAT以B时称分析法仿真模型计算.............................................................33 4.IMATLAB发展史简介及特点...................................................................33 4.2SIMULINK模块介绍.................................................................................34 4.3SIMULINK模型仿真下的时程分析法.....................................................34 4.3.1原结构的运动微分方程..................................................................34 4.3.2输入地震波记录的选取和调整......................................................36 4.3.3地震反应方程求解的数值分析法及Wilson一O法简介.................38 4.3.4阻尼矩阵的确定..........................................................................:,39 4.4椭球体滚轴基础隔震弹性时程分析程序设计与实例演算.....................40 4.5本章小结..........................,....................................................................45 结论与展望................................................................................................................47 展望及待解决的问题...................................................#.#47