高陡边坡组合支挡结构振动台模型试验与数值模拟

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1、ABSTRACTChina．whichissituatedontheintersectionoftheCircum．PacificseismiczoneandEurasianseismiczone，suffersfromearthquakedisastergreatly5．12Wenchuanearthquakecreatedlarge—scalelandslides．coastsandotherdisastersoftheslopeⅦhichwasunprotectedorinadequatelyprotectedandmadehugelossestothepeople。

2、slifesafetyandpropertyGreatWenchuanearthquakebringsupgreatchallengestoselectionandoptimizationoftheslopesupportingstructureAtpresent，China’swesterntrafficisfacinganewconstructionperiod．Therefore，itisnecessarytostudydynamicresponseofthesupportingstructuresunderthestrongearthquake，andtoselec

3、tappropriateretainingstructuresformsoftheslopeBasedonthebackgroundofDariRailwayconstructionincomplicatedgeographicalmountainousareas，thepaperissupportedbyrailwayministry：Anti—seismictechnologystudyofthespecialsupportingstructureofthehi曲一Steepslope(No：2008G028．D-4)Theresearchwascarriedoutto

4、studythedynamicresponseofsupportingstructuresunderseismicactionbyfieldinvestigation，large—scaleshakingtablemodeltestandnumericalsimulationmethods，andinordertoprovideareferencefortheengineeringpracticeThemaincontentsofthisarticleareasfoflows：(1)Fieldinvestigationanddocumentationinvestigatio

5、nonretainingstructureswasconductedonrailwayandroadembankmentsinheavydisasterareaofWenchuanearthquake，andanchorflamebeamasthemainsurpportingstructurewithgoodseismicperformancewereselectedbycomparasion(2)Shakingtablemodeltestforslopewithanchorflamebeamwascamedouttoresearchdynamicreactionofth

6、eslopeandcombinationretainingstructuresunderWenehuanearthquake—waveexcitation(3)NumericsimulationwascarriedoutforcombinationretainingstructuresbyusingFLAC3D．Theresultsbetweenthenumericalsimulationandshakingtablemodeltestresultswerecompared，andtheshakingtablemodeltestresultprovedreliableThe

7、seismicperformanceforcombinationretainingstructurewascomparedandtheretainingstructuresuchaspile—prankwall(down)andprestressedallchorframebeam(up)hadthebetterperformanceduringtheearthquakeKeywords：FLAC3D、supportingstructure、anchorframebeam，numericsimulation，sha