場地地震反應(yīng)分析中的地震動輸入影響研究.pdf

1、中國地震局蘭州地震研究所碩士學(xué)位論文場地地震反應(yīng)分析中的地震動輸入影響研究姓名：王恒知申請學(xué)位級別：碩士專業(yè)：構(gòu)造地質(zhì)學(xué)指導(dǎo)教師：石玉成20090701摘要IIAbstractSiteearthquakeresponseftheantiseismicdesignoftheengineeringstructurestructuralreliabilityestimatescanbeconsideredoneoftheimptantgrou

2、ndmotionparameters.Analysiscalculationofsiteearthquakeresponsethroughsyntheticmethodcanobtainnonstationarygroundmotionconsistentinbedrockresponsespectrum.becausesynthesizedseismicwavesatisfiesarbitrarygroundmotionparamet

3、ersofintensityspectrumdurationtimeiswidelyused.Synthesizedseismicwaveresultsseismicmotioninputuncertaintythusdirectlyaffectsthesiteseismicgroundmotionparameters.Crectlyhletheinfluenceoftheseismicmotioninputuncertaintydis

4、cussthemechanismofseismicmotioninputisobviouslygreattheeticalsignificancepracticalapplicationvalue.Thisstudyfocusedonthefollowingaspects:(1)Summarizetheloessareaacteristicsofcpusluteumseismicmotion.Introducetheloessaread

5、istributionofseismicmotiontheloessareaacteristicofseismicmotionparameterstheloessareainfluencingfactsofseismicmotion.(2)Fittingthesyntheticseismicmotiontimehistylanalyzetheinfluencelawofenvelopecurvetimehistyparametertos

6、iteresponse.Inthispaperthetargetspectralfittingmethodisusedtosynthesizetimehistyofearthquakemotion.Thesoilseismicresponseisanalyzedbychangingthequantitativeparametersofenvelopewhichcouldinfluencethesiteresponseintheproce

7、ssofartificialfittingearthquakemotiontimehisty.Indertoprovidethebasisfseismicftificationsitetheinfluencesofthetimehistyparametersarediscussed.Theresultsshowthatwhent1、t2ctakingdifferentvaluesthesoilseismicresponsehavebee

8、ngreaterimpactbythefittingearthquakemotiontimehistytheinfluencedegreeiscloselyrelatedtothesoilstructure.Meanwhileinthefittingprocessalsotakeintoaccounttheeffectoftheromphaseonmanmadeearthquakegroundmotiontimehisty.(3)Col

9、lecttheGansustrongmotionrecdsaboutMs8.0WenchuanearthquakeanalyzeitsfrequencyspectrumacteristicsthroughtheresponsespectrumtheFourierspectrumtwobedrockstationsstrongmotionrecdstocarryontheanalysisofthesoillayersiteearthqua