直接基于位移的抗震设计方法研究

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1、华南理工大学博士学位论文直接基于位移的抗震设计方法研究姓名：李艺华申请学位级别：博士专业：结构工程指导教师：吴波20061013总结给出了该类有控结构直接基于位移的抗震设计步骤。6．考察了大震作用下，安装粘滞和枯弹性消能器结构的薄弱层层间位移可靠指标与原无控结构薄弱层层间位移可靠指标，第一振型附加阻尼比和粘弹性材料损耗因子之间的定量关系；结合无控结构直接基于位移可靠度的抗震设计步骤，总结给出了安装速度相关型消能器结构直接基于位移可靠度的抗震设计步骤。关键词：抗震设计；基于性能；基于位移；可靠度；有控结构IIAbstract砸ledirectdisplacem

2、em—baseddesign(DDBD)methodisacompletelynewseismicdesignapproachandmaydesignstrueturestoachieveperformancelevelsbyspecifyingstructuraldisplacementresponse．Apassiveenergydissipationsystemcallbeallassistantrolewithsmmuralelementsintheresistingstructuralresponsetovibration。Theperforman

3、celevelofStructuresmaybeeffectivelyimprovedbecauseoftheinstallationofthissystem．Atthepresenttime，thestructuralelementdesignisbasedonreliabilitytheoryanditsfundamentobjectistoensurethattheprobabilityofstructureachievingthepre·selectedperformancelevelmaybeacceptable．Fromtheaboveaddre

4、ss，itmayberecognizedthatthetheoriesofDDBD．controlledstructuredesignandreliabilityallCanbethetheoreticalbasisforachievingperformance·basedseismicdesign．Therefore，basedonthecombinationofthesethreetheories，thestudyofthedirectdisplacement-basedseismicdesignmethodisveryindispensable．The

5、followingworkhasbeendoneinthispaper：1．Investigatethedeterminingmethodsofexistingequivalentdampingrelationships；onthebaseofthisinvestigation,usingtheruleofthebestmatchingbetweenelasticandrelatedinelasticdisplacementspeetr扎accordingtothecalculatedresultsofdynamictimehistoryanalyses，t

6、heappropriateequivalentdampingrelationshipsofhilinearelastic，elastoplasticaaddegradingbilinearmodelsCOAlbeestablishedforDDBDmethod．2．Classifytheselectedearthquakerecordsintermsoftheircharacteristicperiods，thenextensivelyexaminetheratioofspectraldisplacement、vithcertaindampingto5％da

7、mpedspectraldisplacementandproposetheratiorelationship，Explorethepropertyofdisplacementspectraandhencegeneratestandardizeddisplacementratiospectra(displacementspectranormalizedbypcal【grounddisplacement)thatcovinglongerperiods(uptolOs)andhigherdamping(upto50％、．Determinetherelationsh

8、ipbetweenpeakgrounddisplac