大跨度網(wǎng)格結(jié)構(gòu)的多點地震輸入分析

1、分類號：IM31i：!巒繳：壘：ⅡY933575單位代碼：!QQ豎學(xué)號：—030208—140205大跨度網(wǎng)格結(jié)構(gòu)的多點地震輸入分析Analysisofmulti—supportseismicinputforthelongspanspatiallatticestructure學(xué)位申請人：指導(dǎo)教師：學(xué)科專業(yè)：學(xué)位類別：授予單位：答辯日期：王國剛魏建國教授結(jié)構(gòu)工程工學(xué)碩士河北農(nóng)業(yè)大學(xué)二00六年六月十三日Analysisofmultisupp

2、ortseismicinputforthelongspanspatiallatticestructureWangguogangStructuralEngineeringTutor：Weijian—guoAbstraetTheseismicinputisthepreconditionandbaseofstructuralresponseItisassumedintheconventionalcoherent—vibrationinputt

3、hatallofthesupportpointshavethesamegroundmovements，whilecarryingontheanalysisofthelongspanspatiallatticestructuretesponseofearthquakenlisisequaltotreatfoundationaSrigidbodyIfthestructuralsizeisfarsmallerthanthewavelength

4、ofearthquake，thiskindofhypothesisCanbeacceptedActually，becausethedifferenceoftheseismiccharacterandgeologyandseismictransmission，theingoingseismicwaveisvariableonthetimeandspace，evenotherconditionsarecompletelyconsiment，

5、thetimewhicheachsupportpointofaqueductreceiveseismicwaveisfallbehindeachother，becausethedistanceofsupportpointstOthefocusofea曲quakeisdifferent，insametime，themovementwhichreceivedbyeachsupportpointisdifferent，thisistheque

6、stionofmulti—supportseismicinputUsingANSYSsoftwareandbasingonthemodelofthelongspanspatiallatticestructure，thistextbuildstwodoublelayerreticulatedshellmodel，whosespanare80metersand160metersBasingonthemodalanalysisofthestr

7、uctureandANSYSParameterDesignLanguagetheprogramofcoherent—vibrationinputandmulti—supportseismicinputarecompiledUsingtheseprogramsthistextcalculatesthedynamicresponseofmodelTKstextchooses7nodesand8cellstocomparethediffere

8、ncesbetweencoherentvibrationinputandmulti—supportseismicinputIntheanalysisofmulti—supportseismicinput，thistextanalysestheinfluenceofvelocityofseismicwaveandthespanofthestructureontheresponseofearthquakeAnalysisresultsint

9、heconclusion：theresultofmulti—supportinputislargerthancoherentvibrationinputInverticalwave，verticaldisplacement，verticalaccelerationandinternalforceofmulti—supportinputarelargerthancoherentvibrationinput，themagnification

10、coefficientofmaximalvaluearelargestwhenthevelocityofseismicwaveisequalto200m／sWiththeincreaSingofvelocity，themostmagnificationcoefficientaredecreasing；Intransversewave，themagnificationcoeificlentoftransversedisplacement，

11、tlsnsverseaccelerationandinternalforcearealsolargestwhenthevelocityofseismicwaveisequalto200m／sButsomenode’Stransversedisplacement，transverseaccelerationandsomecell’Sinternalforcearesmallerwhenthevelocityofseismicwaveise