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时间:2019-05-13
《钢结构厚板力学性能的低温试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、学兔兔www.xuetutu.com第33卷第5期JournalofCivil,Architectural&EnvironmentalEngineering土木建筑与环境工程Vo1.33No.52O11年10月Oct.2011钢结构厚板力学性能的低温试验研究王元清,周晖,胡宗文,石永久,陈宏(清华大学a.土木工程系土木工程安全与耐久教育部重点实验室;b.建筑设计研究院,北京100084)摘要:厚板钢材在高层建筑和大跨结构中得到了广泛应用,然而厚度的增加会引起钢板力学性能的变化,特别是厚度方向的性能。采用圆棒拉伸试样,对厚度为6O~150mm的建筑结构用厚板Q3
2、45B进行了低温力学性能试验,试样分为垂直轧制方向的横向试样和贯穿厚度方向的Z向试样。试验获得了4种厚度钢板的屈服强度厂v、抗拉强度.厂和断面收缩率等指标及其随温度和取样位置的变化关系,并测得4种厚度钢板Z向性能的相应指标。试验结果表明,随温度的降低,厚板的屈服强度和抗拉强度增大而断面收缩率减小;由钢板表面至中心,横向试样的断面收缩率呈下降趋势;随钢板厚度的增加,Z向试样的断面收缩率逐渐减小,且小于横向试样的断面收缩率。关键词:钢结构;厚板;力学性能;低温;拉伸试验;z向性能中图分类号:TU391文献标志码:A文章编号:1674—4764(2011)05—00
3、07—06ExperimentalAnalysisofMechanicalPropertiesofThickPlateinSteelStructureatLowTemperatureWANGYuan—qing。,ZHOUHui。,HUZong-wen。,SHIYong-jiu。,CHENHong。(a.KeyLaboratoryofCivilEngineeringSafetyandDurabilityofChinaEducationMinistry.DepartmentofCivilEngineering;b.ArchitecturalDesignandRes
4、earchInstitute,TsinghuaUniversity,Beijing100084,P.R.China)Abstract:Thicksteelplatesarewidelyusedinhigh—risebuildingsandlarge—spansteelstructuresHowever,.theincreaseofsteelplatethicknesswillinducevariationsofmechanicalpropertiesofsteelplates,especiallythethicknessproperties.Themechan
5、icalpropertiesofstructuralsteelQ345Bwithplatethicknessfrom60to150mmweretestedatlowtemperaturethroughroundbartensilespecimenswhichincludedtwotypes,i.e.transversespecimenthatisperpendiculartotherollingdirectionandZ-direction(orthroughthickness)specimen.Theindicesofyieldstrengthfy,ulti
6、matetensilestrengthf,percentagereductionofareaandtheirvariationswithtemperatureandsamplinglocationsweremeasuredintheexperiments;thecorrespondingindicesforthoroughthicknesspropertieswerealsoobtained.itisindicatedthat:(1)whentemperaturedecreases,fyandfofthickplateincreasewhilevaluedec
7、reases;(2)fromsurfacetocenterofthethickplate,valuesfortransversespecimensdecrease;(3)withtheincreaseofplatethickness,valuesforZ-directionspecimensdecreaseandaresmallerthanthoseoftransversespecimens.Usefu1materialpropertydataofthicksteelplateareprovidedforthickplatesteelstructures.Ke
8、ywords:steelstructu
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