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1GUANGDONGARCHITECTURECIVILENGINEERING201211JAN2012No.11,,,。19981999CECS102:98《》(《》),、[1],,CECS102:2002。,《》,[2],(、、、、)(、、)。2,。,(2a),a。,,2b,2a。GB50017-2003《》(《》)N(jA)[3],,,j,,。123(1、510034;2、510006;3、()510530):,、,,,。,,。:;;;;ResearchforStrengthandStiffnessofLateralBracingUsedinGabledFrameZhangGuoming1XuZhonggen2ChengXuewen3(1、GuangdongZhonggongArchitecturalDesignInstituteCo.,Ltd.Guangzhou510034,China;2、SchoolofCivilEngineering,GuangzhouUniversityGuangzhou510006,China;3、BlueScopeBuildings(Guangzhou)Ltd.Guangzhou510530,China)Abstract:Whenthedimensionofmembersectionandtheinternalforceofmemberexceedacertainrange,wefoundthefunctionoflateralbracingusedingabledframewillbeweakenbecauseofstrengthorstiffnessinsufficiencyofpurlin.Theaboveresultedinthein-creaseofcalculationallengthofmember.Thispaperbasedonresearchfulachievementsofdomesticandoverseassummarizedtheleastre-quirementofstiffnessofpurlinsothatthelateralbracingtotakeeffectanditalsopresentedaneffectivesolutiontodealwiththebracingproblemwhilethestiffnessofpurlincannotmeettheleastrequirement.Keywords:gabledframe;lateralbracing;purlin;stiffness;sway-bracing83()[⑴⑶]135791113151719Cd=2.0Cd=1.000.20.40.60.81.01.2:JAN2012No.12012113,《》(6)。。,,(2b);,《》《》,。[4],k1,。k1=2Nll(43·d0d+1)⑴:Nl;l;d0、dNl、。⑴,《》5.1.7。,lm(20%),Fbm:Fbm=N[30(m+1)]⑵:N;m。,1901(Butler)[5]:32,:①1300mm;②4200mm2;③1130kN·m。,。[6],2:⑴bl=4·(Mfh)·CL·CdLb⑶:Mf(in.·kips);h(in.);CL,CL=1+(1.2n)(n);Cd,1.0,2.0;Lb(in.)。(:1in.·kips=0.113kN·m;1in.=0.0254m)⑵Fbr=0.008·CL·Cd·Mfh⑷:Fbr(kips)。(:1kips=4.448kN)⑴⑶,⑴⑶3。。,4~16,3,(Cd=1.0),0.898~1.086,10%,。(Cd=2.0),0.448~0.542,0.495,50%。,:①、(、),;②,,、、;③,、,(4),。,。,、、。2訳訴NL=2aaaNL=2aaa495(kN·m)1525-2428.9245.21145-1209.1127.8915916-34.91205803.1-83.61320999.7-93.81205803.1-83.691591.6-34.9145-1209.1127.91525-2428.9245.2(mm)+++(:▲。)110009500950010×9100610008×7625JAN2012No.12012114。,61m(W)×110m(L)×6.1m(H),30.5m。:0.38kNm2,1.2kNm2,0.62kNm2,0.14kNm2。STAAD.Pro,,5。,“++”,2(1525mm),“+”,(1320mm)。,7.625m(1145mm),“++”,[6],。,⑶:b=4·(Mfh)·CL·CdLb⑸:Mf,1209.1kN·m;h,1.145m;CL,1+(1.2n)(n),,n=7,CL=1.17;Cd,1.0,2.0,1.0;Lb,7.625m。,:b=[4×(1209.11.145)×1.17×1.07.625)]=648.1kN·m,⑷,:Fbr=0.008×1.17×1.0×1209.11.145=9.88kN(6),。,、:①,;②,,,30°~60°,45°。,9.88×1.4142=6.99kN,PKPM,:Z292×3.0,Z292×2.1,f12C。,,648.1kNm,1kN1.54mm。45°,,1kN,1.54mm,。,1.54×9.882=7.61mm,9.1mm,,。,,:①,,。,4.94kN(9.882=4.94kN)2;②、;③。⑸、⑹。7,,6Fbr=9.88kN79.88kN9.95kN9100114510:JAN2012No.1201211,f12(,35#)22.3kN,。(8):⑺,f12:b=ABR·E·LB2(LB2+LC2)3姨=(90.5×206×103×9100)(91002+11452)3姨=2000.5kNm>648.1kNm,。,f12。,,90~150(Galesburg),。,,Excel,[6]。55.1《》、《》《》,,0.7kNm2。,《》,,,,《MBMA2002》[7]1.4.81.4.5(a)、(b)。5.2《》5.1.7,,IBC2000,,。,,()13[5]。66.1,、⑴、⑶,(Cd=1.0),;(Cd=2.0),50%。6.2,《》5.1.7、《》6.1.6,⑷。6.3,,,。6.4,,、、,。6.5,《》、《》《》,;,《MBMA2002》。6.6,,()13。[1].()[M].:,2002[2]CECS102:2002[S][3]GB50017-2003[S][4].()[M].:,2005[5]ButlerManufacturingCompany.LargeSpanSolidWebBuildings(DPL)[6]JosephAYura,SummaryofBracingRecommendations[J].AmericanInstituteofSteelConstruction,1994(4)[7]MetalBuildingSystemsManua[S].MetalBuildingManu-facturersAssociation,Inc.,2002△′=△·cosq=F′·LABR·E=F·Lcosq·ABR·E,L,L2=LB2+LC2。△=△′cosq=F·Lcos2q·ABR·Eb=F△=ABR·E·cos2qL=ABR·E·(LBL)2L=ABR·E·LB2(LB2+LC2)3姨⑹8ABRLBF′=FcosqLcqFq△′=△cosq△11
本文标题:门式刚架结构侧向支撑的强度和刚度研究
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