JJG (纤检) 03-1993 亚麻纤维气流细度仪检定规程
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基本信息
| 标准名称： | 亚麻纤维气流细度仪检定规程 |
| 中标分类： | 综合 >> 计量 >> 长度计量 |
| 发布部门： | 中国纤维检验局 |
| 发布日期： | |
| 实施日期： | 2004-11-01 |
| 首发日期： | |
| 作废日期： | |
| 归口单位： | 中国纤维检验局 |
| 起草单位： | 黑龙江省纤维检验所、黑龙江省纺织工业研究所 |
| 起草人： | 盛喜才、石平 |
| 出版日期： | |
| 页数： | 4页 |
适用范围
适用于新制造、使用中和修理后的亚麻纤维气流细度仪的检定。
前言
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目录
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引用标准
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所属分类： 综合 计量 长度计量
下载地址: 点击此处下载
【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标准试验方法
【标准号】:ASTMD5311-1992(2004)e1
【标准状态】:现行
【国别】:美国
【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】:
【英文主题词】:consolidated-undrainedtests;cohesionlesssoils;laboratorytests;liquefaction;triaxialtests;Axialstrain;Cohesionlesssoil;Consolidated-undrainedtests;Cyclicstrengthtests;Liquefaction;Loadcontrolledcyclictriaxialtechnique;Loadingt
【摘要】:Cyclictriaxialstrengthtestresultsareusedforevaluatingtheabilityofasoiltoresisttheshearstressesinducedinasoilmassduetoearthquakeorothercyclicloading.Cyclictriaxialstrengthtestsmaybeperformedatdifferentvaluesofeffectiveconfiningpressureonisotropicallyconsolidatedspecimenstoprovidedatarequiredforestimatingthecyclicstabilityofasoil.Cyclictriaxialstrengthtestsmaybeperformedatasingleeffectiveconfiningpressure,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).1.3Cyclictriaxialstrengthtestsareconductedunderundrainedconditionstosimulateessentiallyundrainedfieldconditionsduringearthquakeorothercyclicloading.1.4Cyclictriaxialstrengthtestsaredestructive.Failuremaybedefinedonthebasisofthenumberofstresscyclesrequiredtoreachalimitingstrainor100%porepressureratio.SeeSection3forTerminology.1.5Thistestmethodisgenerallyapplicablefortestingcohesionlessfreedrainingsoilsofrelativelyhighpermeability.Whentestingwell-gradedmaterials,silts,orclays,itshouldberecognizedthatpore-waterpressuresmonitoredatthespecimenendstonotingeneralrepresentpore-waterpressurevaluesthroughoutthespecimen.However,thistestmethodmaybefollowedwhentestingmostsoiltypesifcareistakentoensurethatproblemsoilsreceivespecialconsiderationwhentestedandwhentestresultsareevaluated.1.6Therearecertainlimitationsinherentinusingcyclictriaxialteststosimulatethestressandstrainconditionsofasoilelementinthefieldduringanearthquake.1.6.1Nonuniformstressconditionswithinthetestspecimenareimposedbythespecimenendplatens.Thiscancausearedistributionofvoidratiowithinthespecimenduringthetest.1.6.2A90x00B0;changeinthedirectionofthemajorprincipalstressoccursduringthetwohalvesoftheloadingcycleonisotropicallyconsolidatedspecimens.1.6.3Themaximumcyclicshearstressthatcanbeappliedtothespecimeniscontrolledbythestressconditionsattheendofconsolidationandthepore-waterpressuresgeneratedduringtesting.Foranisotropicallyconsolidatedcontractive(volumedecreasing)specimentestedincycliccompression,themaximumcyclicshearstressthatcanbeappliedtothespecimenisequaltoone-halfoftheinitialtotalaxialpressure.Sincecohesionlesssoilsarenotcapableoftak......
【中国标准分类号】:P13
【国际标准分类号】:
【页数】:10P.;A4
【正文语种】:英语
【原文标准名称】:土壤的负荷控制三向疲劳强度的标准试验方法
【标准号】:ASTMD5311-1992(2004)e1
【标准状态】:现行
【国别】:美国
【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】:
【英文主题词】:consolidated-undrainedtests;cohesionlesssoils;laboratorytests;liquefaction;triaxialtests;Axialstrain;Cohesionlesssoil;Consolidated-undrainedtests;Cyclicstrengthtests;Liquefaction;Loadcontrolledcyclictriaxialtechnique;Loadingt
【摘要】:Cyclictriaxialstrengthtestresultsareusedforevaluatingtheabilityofasoiltoresisttheshearstressesinducedinasoilmassduetoearthquakeorothercyclicloading.Cyclictriaxialstrengthtestsmaybeperformedatdifferentvaluesofeffectiveconfiningpressureonisotropicallyconsolidatedspecimenstoprovidedatarequiredforestimatingthecyclicstabilityofasoil.Cyclictriaxialstrengthtestsmaybeperformedatasingleeffectiveconfiningpressure,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).1.3Cyclictriaxialstrengthtestsareconductedunderundrainedconditionstosimulateessentiallyundrainedfieldconditionsduringearthquakeorothercyclicloading.1.4Cyclictriaxialstrengthtestsaredestructive.Failuremaybedefinedonthebasisofthenumberofstresscyclesrequiredtoreachalimitingstrainor100%porepressureratio.SeeSection3forTerminology.1.5Thistestmethodisgenerallyapplicablefortestingcohesionlessfreedrainingsoilsofrelativelyhighpermeability.Whentestingwell-gradedmaterials,silts,orclays,itshouldberecognizedthatpore-waterpressuresmonitoredatthespecimenendstonotingeneralrepresentpore-waterpressurevaluesthroughoutthespecimen.However,thistestmethodmaybefollowedwhentestingmostsoiltypesifcareistakentoensurethatproblemsoilsreceivespecialconsiderationwhentestedandwhentestresultsareevaluated.1.6Therearecertainlimitationsinherentinusingcyclictriaxialteststosimulatethestressandstrainconditionsofasoilelementinthefieldduringanearthquake.1.6.1Nonuniformstressconditionswithinthetestspecimenareimposedbythespecimenendplatens.Thiscancausearedistributionofvoidratiowithinthespecimenduringthetest.1.6.2A90x00B0;changeinthedirectionofthemajorprincipalstressoccursduringthetwohalvesoftheloadingcycleonisotropicallyconsolidatedspecimens.1.6.3Themaximumcyclicshearstressthatcanbeappliedtothespecimeniscontrolledbythestressconditionsattheendofconsolidationandthepore-waterpressuresgeneratedduringtesting.Foranisotropicallyconsolidatedcontractive(volumedecreasing)specimentestedincycliccompression,themaximumcyclicshearstressthatcanbeappliedtothespecimenisequaltoone-halfoftheinitialtotalaxialpressure.Sincecohesionlesssoilsarenotcapableoftak......
【中国标准分类号】:P13
【国际标准分类号】:
【页数】:10P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 鸡用乳头式饮水器 |
| 中标分类： | 农业、林业 >> 农、林机械与设备 >> 畜牧、家禽机械与设备 |
| 替代情况： | 替代NJ 292-83;NJ 293-83;被JB/T 7720-2007代替 |
| 发布日期： | 1995-06-20 |
| 实施日期： | 1996-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2008-03-01 |
| 归口单位： | 中国农业机械化科学研究院 |
| 出版日期： | 1900-01-01 |
| 页数： | 5 页 |
| 批文号： | 机械科[1995]494号 |
适用范围
本标准规定了饮水器的型号、参数、技术要求、试验方法与验收规。
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 农业 林业 农 林机械与设备 畜牧 家禽机械与设备
