【英文标准名称】:StandardTestMethodsforModulusandDampingofSoilsbyResonant-ColumnMethod
【原文标准名称】:用共振柱法测定土壤的模数和阻尼因数的标准试验方法
【标准号】:ASTMD4015-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.09
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:建筑;施工材料;阻尼(波);模数;土壤;测试
【英文主题词】:amplitude;confiningpressure;damping;dynamicloading;elasticwaves;elasticitymodulus;frequency;laboratorytests;nondestructivetests;resonance;sheartests;soils;strain;stress;torsionaloscillations;triaxialstress;vertical
【摘要】:Themodulusanddampingofagivensoil,asmeasuredbytheresonant-columntechniquehereindescribed,dependuponthestrainamplitudeofvibration,theambientstateofeffectivestress,andthevoidratioofthesoil,temperature,time,etc.Sincetheapplicationandcontroloftheambientstressesandthevoidratioarenotprescribedinthesemethods,theapplicabilityoftheresultstofieldconditionswilldependonthedegreetowhichtheapplicationandcontroloftheambientstressesandthevoidratio,aswellasotherparameterssuchassoilstructure,duplicatefieldconditions.Thetechniquesusedtosimulatefieldconditionsdependonmanyfactorsanditisuptotheengineertodecideonwhichtechniquesapplytoagivensituationandsoiltype.1.1Thesetestmethodscoverthedeterminationofshearmodulus,sheardamping,rodmodulus(commonlyreferredtoasYoung''smodulus),androddampingforsolidcylindricalspecimensofsoilintheundisturbedandremoldedconditionsbyvibrationusingtheresonantcolumn.Thevibrationofthespecimenmaybesuperposedonacontrolledambientstateofstressinthespecimen.Thevibrationapparatusandspecimenmaybeenclosedinatriaxialchamberandsubjectedtoanall-aroundpressureandaxialload.Inaddition,thespecimenmaybesubjectedtoothercontrolledconditions(forexample,pore-waterpressure,degreeofsaturation,temperature).Thesetestmethodsofmodulusanddampingdeterminationareconsiderednondestructivewhenthestrainamplitudesofvibrationarelessthan104rad(104in./in.),andmanymeasurementsmaybemadeonthesamespecimenandwithvariousstatesofambientstress.1.2Thesetestmethodscoveronlythedeterminationofthemodulusanddamping,thenecessaryvibration,andspecimenpreparationproceduresrelatedtothevibration,etc.,anddonotcovertheapplication,measurement,orcontroloftheambientstress.Thelatterproceduresmaybecoveredby,butarenotlimitedto,TestMethodsD2166orD2850.1.3AllrecordedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.3.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheusersobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.3.2Measurementsmadetomoresignificantdigitsorbettersensitivitythanspecifiedinthisstandardshallnotberegardedanonconformancewiththisstandard.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.ReportingtestresultsinunitsotherthanSIshallberegardedasconformancewiththesetestmethods.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:22P.;A4
【正文语种】: