考慮接觸問(wèn)題的粘彈性介質(zhì)中盾構(gòu)隧道的抗震分析.pdf

1、同濟(jì)大學(xué)博士學(xué)位論文考慮接觸問(wèn)題的粘彈性介質(zhì)中盾構(gòu)隧道的抗震分析姓名：劉學(xué)山申請(qǐng)學(xué)位級(jí)別：博士專(zhuān)業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：馮紫良2000.5.1ABSTRACTInthisdissertation，therearetwomainaspectsThefirstoneistostudytheearthquake—resistantproblemofundergroundstructuresinlongitudinaldirection，●whi

2、chincludesthetheoreticalandnumericaloscillationanalysisofbeamonviscoelasticfoundationsofWinklertypeandthelongitudinalearthquake—resistantanalysisofshieldtunnelThesecondaspectistostudytheproblemofcarthquake—resistantofund

3、ergroundstructuresintransversaldirection，includingthetransversalearthquake—resistantanalysisofshieldtunnelstakingaccountofcontactproblemsandtheparametricanalysisTheoscillationtheoryofbeamonviscoelasticfoundationsisstudie

4、dfirstlyThestressstrainequationsofvibratingbeamsonviscoelasticfoundationsareestablished，andtheprogressionalsolutionsforfreevibrationandforcedvibrationareobtainedThedynamicFEMprogramforanalyzingtheoscillationproblemofbeam

5、restrainedbyviscoelasticsoilispresentedandtestedtheoreticallyTheprogramisimprovedwhenusedforthelongitudinalearthquake—resistantanalysisofshieldtunnelsandiscapableofsolvingthedynamicproblemofundergroundstructureswhereexis

6、tjointsThestiffnessformulaoflongitudinaljointsofshieldtunnelsisderived，theinnerforceandjointdeformingoftunnelunderseismicexcitationarealsesearchedInanalyzingtransversalearthquakeresistantofshieldtunnels，twotypesofcontact

7、problemsaremet，OReisthecontactbetweentunnellininganditssurroundingsoilandtheotheristhecontactbetweentwolinkedsegmentsTheyaresimulatedwithfour—nodeandtwo—nodejointelementseparatelywhentheFEMprogramofsoil—strueluredynamici

8、nteractioniswrittenandthesegmentjointstiffnessisderivedjtheoreticallyinthepaperByrealengineeringexample，theinfluenceofjointsontheinnerforceanddeformationoftunnelunderseismicexcitationarestudiedThe：parametricstudyisprocee