MIL-STD-1649 (AS) (NOTICE 1)
时间:2024-05-07 19:01:03 来源: 标准资料网 作者：标准资料网 阅读：8825
MIL-STD-1649 (AS) (NOTICE 1), MILITARY STANDARD FILM, MOTION PICTURE, SUPER 8MM, LABORATORY PREPARATION OF. MIL-STD-1649 (AS), dated 31 May 1974, is hereby canceled without replacement.
【英文标准名称】:StandardTestMethodforLoadControlledCyclicTriaxialStrengthofSoil
【原文标准名称】:土壤的负荷控制三向疲劳强度的测试方法
【标准号】:ASTMD5311-1992(2004)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:压缩试验;土力学;土壤普查
【英文主题词】:consolidated-undrainedtests;cohesionlesssoils;laboratorytests;liquefaction;triaxialtests
【摘要】:Cyclictriaxialstrengthtestresultsareusedforevaluatingtheabilityofasoiltoresisttheshearstressesinducedinasoilmassduetoearthquakeorothercyclicloading.5.1.1Cyclictriaxialstrengthtestsmaybeperformedatdifferentvaluesofeffectiveconfiningpressureonisotropicallyconsolidatedspecimenstoprovidedatarequiredforestimatingthecyclicstabilityofasoil.5.1.2Cyclictriaxialstrengthtestsmaybeperformedatasingleeffectiveconfiningpressure,usuallyequalto14.5lb/in.2(100kN/m2),oralternatepressuresasappropriateonisotropicallyconsolidatedspecimenstocomparecyclicstrengthresultsforaparticularsoiltypewiththatofothersoils,Ref(2).Thecyclictriaxialtestisacommonlyusedtechniquefordeterminingcyclicsoilstrength.Cyclicstrengthdependsuponmanyfactors,includingdensity,confiningpressure,appliedcyclicshearstress,stresshistory,grainstructure,ageofsoildeposit,specimenpreparationprocedure,andthefrequency,uniformity,andshapeofthecyclicwaveform.Thus,closeattentionmustbegiventotestingdetailsandequipment.1.1Thistestmethodcoversthedeterminationofthecyclicstrength(sometimescalledtheliquefactionpotential)ofsaturatedsoilsineitherundisturbedorreconstitutedstatesbytheload-controlledcyclictriaxialtechnique.1.2Thecyclicstrengthofasoilisevaluatedrelativetoanumberoffactors,including:thedevelopmentofaxialstrain,magnitudeofappliedcyclicstress,numberofcyclesofstressapplication,developmentofexcesspore-waterpressure,andstateofeffectivestress.Acomprehensivereviewoffactorsaffectingcyclictriaxialtestresultsiscontainedintheliterature().1.3Cyclictriaxialstrengthtestsareconductedunderundrainedconditionstosimulateessentiallyundrainedfieldconditionsduringearthquakeorothercyclicloading.1.4Cyclictriaxialstrengthtestsaredestructive.Failuremaybedefinedonthebasisofthenumberofstresscyclesrequiredtoreachalimitingstrainor100%porepressureratio.SeeSectionforTerminology.1.5Thistestmethodisgenerallyapplicablefortestingcohesionlessfreedrainingsoilsofrelativelyhighpermeability.Whentestingwell-gradedmaterials,silts,orclays,itshouldberecognizedthatpore-waterpressuresmonitoredatthespecimenendstonotingeneralrepresentpore-wat
【中国标准分类号】:P13
【国际标准分类号】:
【页数】:10P.;A4
【正文语种】:
【英文标准名称】:PracticefortheOccupational/EnvironmentalHealthViewoftheElectronicHealthRecord
【原文标准名称】:电子健康记录的职业/环境卫生的使用规程
【标准号】:ANSI/ASTME2473-2006
【标准状态】:现行
【国别】:美国
【发布日期】:2006-02-14
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:使用;电子的;环境卫生;;个人保健;公共卫生;;工艺学;视图;意见
【英文主题词】:Applications;Electronic;Environmentalhealth;Occupation;Personalhealth;Publichealth;Record;Technology;Views
【摘要】:Thispracticeisintendedtoassemblealogicaloccupational/environmenthealthviewofthealreadydefindedgeneralstructueandvocabularyfortheElectroniceHealthRecord(EHR)andtosuggestthewaysinwhichthisviewcanbeusedtosupportemployeehealthassessmentandotherhealthcaredeliveredattheworksite.
【中国标准分类号】:C05
【国际标准分类号】:35_240_80
【页数】:
【正文语种】:英语