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【英文标准名称】:StandardSpecificationforEvaluationofDurationofLoadandCreepEffectsofWoodandWood-BasedProducts
【原文标准名称】:木制和木基产品的荷载和蠕变效应的持续时间的评价的标准规范
【标准号】:ASTMD6815-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D07.01
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:creeprate;creep-rupture;durationofload;fractionaldeflection;lumber;structuralcompositelumber;structural-usepanels;Durationofload;Fractionaldeflection;Lumber--specifications;Structuralcompositelumber(SCL)--specifications;Struc
【摘要】:1.1Thisspecificationprovidesaprocedurefortestingandevaluatingdurationofloadandcreepeffectsofwoodandwood-basedmaterialsrelativetoanaccepteddurationofloadadjustmentmodel.Thisspecificationwascreatedforproductsthatarecurrentlycoveredbyaconsensusstandard(forexample,lumber,structuralcompositelumber,andstructural-usepanels).ThisprocedureisintendedtodemonstratetheengineeringequivalencetothedurationofloadandcreepeffectsofvisuallygradedlumberasspecifiedinPracticeD245foraproductunderevaluationusedindryserviceconditions.Thisprocedureisnotintendedtoevaluatetheperformanceofproductsunderimpactloading.Quantificationofspecificdurationofloadorcreepfactorsisbeyondthescopeofthisspecification.ForfurtherguidanceregardingtheapplicabilityofthisspecificationrefertoX1.1intheCommentary.1.2UseoftheprocedureinthisspecificationtodetermineequivalencetothePracticeD245durationofloadrelationshipislimitedtosolidwoodandwood-basedproductswhoselongtermloadbehaviorissimilartothatofsolidwood.Equivalencedemonstratedinthisspecificationisdependentuponevaluationofaproduct''s90-day(minimum)creep-ruptureperformance.Inthisevaluation,threecriteriamustbesatisfied:(1)adequatestrengthovera90-dayperiod,(2)decreasingcreeprate,and(3)limitedfractionaldeflection.AsummaryofthedevelopmentofthesecriteriaandtheunderlyingassumptionsbehindthemisprovidedintheCommentaryinAppendixX1andAppendixX2.1.3Longtermdegradationphenomenanotdescribedbyacreep-rupturemodelarenotaddressedinthisspecification(seeCommentaryX1.2.4).
【中国标准分类号】:B71
【国际标准分类号】:79_080
【页数】:12P.;A4
【正文语种】:英语