ISO 12494-2001 结构的大气结冰

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【英文标准名称】:Atmosphericicingofstructures
【原文标准名称】:结构的大气结冰
【标准号】:ISO12494-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-08
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC98
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑;负荷测量;建筑物;重量;负荷;冰荷载;雪;结构;冰;雪荷载;冻结;活荷载;屋顶区;大气的;建设工程;阻力系数;定义;建筑工程
【英文主题词】:
【摘要】:1GeneralThisInternationalStandarddescribesthegeneralprinciplesofdeterminingiceloadonstructuresofthetypeslistedin1.2.Incaseswhereacertainstructureisnotdirectlycoveredbythisoranotherstandardorrecommendation,designersmayusetheintentionsofthisInternationalStandard.However,theusershouldalwaysconsidercarefullytheapplicabilityofthestandard(recommendation)tothestructureinquestion.ThepracticaluseofalldatainthisInternationalStandardisbaseduponcertainknowledgeofthesiteofthestructure.Itisnecessarytohaveinformationaboutthedegreeof"normal"icingamounts(=iceclasses)forthesiteinquestion.Formanyareas,however,noinformationisavailable.EveninsuchcasesthisInternationalStandardcanbeuseful,becauselocalmeteorologistsorotherexperiencedpersonsshouldbeableto,onthesafeside,estimateapropericeclass.Usingsuchanestimateinthestructuraldesignwillresultinamuchsaferstructure,thandesigningwithoutanyconsiderationsforproblemsduetoice.CAUTIONItisextremelyimportanttodesignforsomeiceinsteadofnoice,andthenthequestionofwhethertheamountoficewascorrectisoflessimportance.Inparticular,theactionofwindcanbeincreasedconsiderablyduetobothincreasedexposedareaandincreaseddragcoefficient.2ApplicationThisInternationalStandardisintendedforuseindeterminingicemassandwindloadontheicedstructureforthefollowingtypesofstructure:—masts;—towers;—antennasandantennastructures;—cables,stays,guyropes,etc.;—ropeways(cablerailways);—structuresforski-lifts;—buildingsorpartsofthemexposedtopotentialicing;—towersforspecialtypesofconstructionsuchastransmissionlines,windturbines,etc.AtmosphericicingonelectricaloverheadlinesiscoveredbyIEC(InternationalElectrotechnicalCommission)standards.ThisInternationalStandardisintendedtobeusedinconjunctionwithISO2394.NOTESometypicaltypesofstructurearementioned,butothertypesmightbeconsideredalso.Designersshouldthinkintermsofwhichtypeofstructureissensitivetounforeseenice,andactthereafter.Also,inmanycasesonlypartsofstructuresshouldbedesignedforiceloads,becausetheyaremorevulnerabletounforeseenicethanisthewholestructure.EvenifelectricaloverheadlinesarecoveredbyIECstandards,designersmayusethisInternationalStandardforthemaststructurestooverheadlines(whicharenotcoveredbyIECstandards)iftheysowish.
【中国标准分类号】:P30
【国际标准分类号】:91_080_01
【页数】:56P;A4
【正文语种】:英语