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1、建筑結(jié)構(gòu)學報JournalofBuildingStructures第35卷第5期2014年5月007Vol.35No.5May2014文章編號:1000-6869(2014)05-0048-09冷彎薄壁型鋼與結(jié)構(gòu)用OSB板自攻螺釘連接性能試驗研究李元齊1,馬榮奎1,何慧文2(1.同濟大學建筑工程系,上海200092;2.上海鋼之杰(集團)公司,上海200949)摘要:龍骨式復(fù)合墻體是冷彎薄壁型鋼龍骨體系結(jié)構(gòu)的主要抗側(cè)力構(gòu)件,其抗震性能與覆面板和龍骨骨架間自攻螺釘連接的性能密切相關(guān)。通過對受單調(diào)和低周往
2、復(fù)受剪荷載的冷彎薄壁型鋼龍骨與結(jié)構(gòu)用OSB板自攻螺釘連接受力性能的試驗研究,分析了加載速率、面板布置方向、螺釘端距以及龍骨壁厚等因素對其抗震性能的影響。研究結(jié)果表明:試驗加載速率和OSB板布置方向?qū)ζ涫芗粜阅芫鶡o明顯影響;隨著螺釘端距在試驗釘距范圍內(nèi)增大,荷載及變形能力均有大幅提高;隨著龍骨壁厚由0.8mm增大至1.0mm,峰值荷載提高了約10%,而變形能力則無明顯變化規(guī)律。最后,在試驗結(jié)果基礎(chǔ)上,采用改進的“Foschi”指數(shù)型骨架曲線和定點指向型滯回規(guī)則建立了鋼龍骨與結(jié)構(gòu)用OSB板自攻螺釘連接的恢
3、復(fù)力模型,為龍骨式復(fù)合墻體及房屋整體的抗震性能數(shù)值模擬研究提供了基本參數(shù)。關(guān)鍵詞:冷彎薄壁型鋼;結(jié)構(gòu)用OSB板;螺釘連接;靜力試驗;擬靜力試驗;數(shù)值模擬分析;恢復(fù)力模型;抗震性能中圖分類號:TU392.5TU317.1文獻標志碼:AExperimentalstudyonbehaviorofscrewconnectionsforcold-formedthin-walledsteelandstructuralOSBboardsLIYuanqi1,MARongkui1,HEHuiwen2(1.Departm
4、entofBuildingEngineering,TongjiUniversity,Shanghai200092,China;2.ShanghaiBeststeelGroup,Shanghai200949,China)Abstract:Theseismicbehaviorofframingshearwall,whichisthemainlateralforce-resistanceassemblyofcold-formedthin-walledsteelframingsystem,iscloselya
5、ssociatedwiththebehaviorofscrewconnectionsbetweensteelstudsandsheathingboards.Aseriesoftestsonbehaviorofscrewconnectionsbetweenthecold-formedsteelstudsandstructuralorientedstrandboards(OSBs),undermonotonicandcyclicshearloading,werecarriedout.Themainobje
6、ctivesofthetestsweretoinvestigatetheeffectsofloadingrate,sheathingorientation,enddistanceofscrewsandthicknessofsteelstuds.Itisshownthat,theshearbehaviorofscrewconnectionsislittleaffectedbyboththetestedloadingrateandsheathingorientation;boththestrengthan
7、ddeformationincreasewiththeenddistanceincreasinginthetestedrange;thepeakloadincreasesbyabout10%withstudthicknessincreasingfrom0.8mmto1.0mm,whilethedeformationdoesnotexhibitacleartendency.Finally,basedonthetestsresults,arestoringforcemodelofscrewconnecti
8、onsbetweencold-formedsteelstudsandstructuralOSBwasobtainedbythecombinationofmodifiedexponential‘Foschi’skeletoncurveandpivothystereticrule,whichwillsupportthenumericalstudyonseismicbehaviorofframingshearwalls,andevenintegralbuild