高桥墩在强震作用下的动力响应与空间非线性分析

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1、臼伽verseexcitation，verticalexcitation,transverseandverticaltwo‘dimensionalexcitationbasedonworkingconditionsoflinearelasticityandgeometricallynoIdiIleaLConsideringsixworkingconditionscomparativeanalysis，theresultsverifiedthatdisplacementvaluesandinternalforcevaluesofcrosssectionsincreasedabout5％consi

2、deringlargedeformationeffectwhichcouldbemoreclosetorealforcesituationonpier．3．TheiIltemalforcevaluesofCOreareainmiddlepierWasrelativelysmall，butcomparedtootherareathedeformationWaSlarge．Ⅵsiblyequivalentpartofdefomationcanmeetthecoordinationonpierdeformation．Thereforeitisimportanttoincreaseflexibilit

3、y,arrangereinforcementflexiblyanddecreaseitsweight·Soflexible-piershouldbeoptimalselection．4．Comp锄．edwiththreeexcitations，verticalexcitationprovidedlesscontributiontotl硼versea【ldlongitudinaldisplacementsthanotherexcitations．ItisconnectedcloselYwimfixedcon蛐c抽tinthepierbottom．Inthebasicpartofbridgepie

4、r,strengtheningpile-soilintegritycoulddecreasedcontributionratioofverticalexcitation-5．hlthree虹Ildsofexcitations，thetrendinlongitudinaldisplacementisdifferentf如mtIansversedisplacement．Transversedisplacementgraduallyincreasedalongthepier’longi砌iIlaldisplacementofforwarddirectiongotmaximalvalueoverthe

5、middleofpieraIldlongitudinaldisplacementofnegativedirectiongotmaximalvalueatthe101werpartofpier．Itisconnectedwithrigidnessoflongitudinalandtransversedirection．Thecoreareainpierbottomhadhighforceandlowdeformation,wouldoccurplastichingeatfirst．Thenthesuperstructureeffectedoncoreareainpiertop，apl)e舭ngp

6、l枷chingesecondly．Atlast，externalforcegraduallyconcentratedtothecentralpl盱andconsl瞳血eddeformation．Thethirdplastichingewouldappearinthecentralpier．KEYWORDS：high-pier；geometricnonlinearity；dynamicresponse；transientchain-cuRingdisastermitigation；目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．1引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯l1．1．1课题的

7、研究意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．1．2国内、外高墩桥梁的发展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．21．2高墩桥梁的结构特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．51．3桥梁非线性理论的研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．61．4强震下高墩稳定理论研究现状及发展动态⋯⋯⋯⋯⋯⋯⋯⋯．71．5弱势环节断链减灾机制在桥梁震害中的应用⋯⋯⋯⋯⋯⋯⋯．．81．5．1孕源断链减灾⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．81．5．