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1,222(11,432000;21,430072)[]GB5001722003,LRFD22001EC3,3,[];;;,;[]TU391[]A[]10012523X(2004)1020001203COMPARATIVELYSTUDYTHEBUCKLINGLIMITATIONSOFCOMPRESSIONORTENSILEMEMBERSANDTHECALCULATINGMETHODOFPOST2BUCKLINGSTRENGTHOFTHESHEARWEBBEAMXiaoGui2qingLiMao2huaHouJian2guo[Abstract]OnthebasesofChinesenewnationalstandard,GB5001722003,combinedwithAmericanstructuralsteelcriterionandEuropeancriterionEC3,calculatedanalyzedandcomparedthebucklinglimitationsofcompressionortensilemembers,andthecalculatingmethodofpost2bucklingstrengthaboutthebeamthatsubjectedtoshearinitsweb.Therelevantconclusionprovidedtheengineeringtechnicianwithaconferencetolearnthedevelopmentandtheleveloftechniqueofthesteelstructurecriterionshomeandaboard.[Keywords]Bucklinglimitations;Web;Flange;Post2bucklingstrength;Tensionfieldtheory;Generalwebdepth2thicknessratio:2004-07-06:(19662),,,,,,,,,ISO,,,,,GB5001722003LRFD22001EC3,,3,11.1,,,,11GB5001722003LRFD22001EC3150(200)300(350)200300180(250)(350)1,,GB5001722003150200,13110200410BuildingTechniqueDevelopmentVol.31,No.10Oct.2004LRFD22001200,;EC3,180;250;350;EC3GB5001722003,GB5001722003300350;LRFD22001300,GB5001722003;EC31.2,h0PtW,bPt,22h0PtWbPtGB5001722003(25+0.5)235Pfy(10+0.1)235PfyLRFD22001:0.38EPfy:0.95EP(fyPKc)EC3133235Pfy238235Pfy110235Pfy211235PfyGB500172200340235PfyLRFD2200111.25235PfyGB5001722003,30100,40235Pfy75235Pfy;13235Pfy20235PfyLRFD22001,E=206103NPmm2,0.35Kc0.76,LRFD2200111.25235Pfy,16.64235Pfy24.52235Pfy2:EC3GB5001722003,LRFD22001EC3,GB5001722003,LRFD22001GB5001722003EC32,LRFD22001EC3,CB50017220032,,,,,(GBJ1721988),GB5001722003GB5001722003,:s0.8Vu=hwtwfv(1)0.8s1.2Vu=hwtwfv[1-0.5(s-0.8)](2)s1.2Vu=hwtwfvP1.2s(3):Vu;s;tw;hw;fvEC3:Vu=[(h0twTbb)+0.9(gtwbbsin)]PM(4)bb=[f2y-3Tbb+2]0.5-=1.5Tbbsin2w0.8,Tbb=fyP30.8w1.25,Tbb=[1-0.8(w-0.8)]fyP3w1.25,Tbb=(1-2w)fyP3g=h0cos-(a-Sc-St)sin:;g;ScSt;Tbb;bb;fy;ws;M,111LRFD22001:hPtw1.10KvEPfy,Vu=0.90.6fyAw(5)hPtw1.10KvEPfy,Vu=0.90.6fyAwCv+1-Cv1.151+(aPh)2(6):Kv;Cv,,3GB5001722003,EC3,s1123,EC3018,EC3210:31;LRFD22001,,Q235,hc=977mm,a=2000mm,1GB5001722003LRFD22001EC311-40014;2-200010;345014GB5001722003:aPh0=1,s=1.5261.2Vu=hwtwfvP1.2s=1505.78kNEC3:w=1.6781.25Tbb=(1-2w)fyP3=44.085=P1.5=30,=57.268bb=151.72,g=732.05Vu=1255.9kNLRFD22001:aPh=1,Kv=10hPtw=2001.37EvEPfy=134.1,Cv=0.362Vu=1751.2kNVVVGB5001722003EC3LRFD22001,V-V)PV=-16.6%,(V-V)PV=16.3%,EC3GB500172200316.6%,LRFD22001GB500172200316.3%3,:a),GB5001722003150200,LRFD22001,200,GB5001722003;EC3180250350,GB5001722003CB5001722003300350,LRFD22001,300,GB5001722003;EC3,b),LRFD22001EC3,GB5001722003EC3GB5001722003,LRFD22001LRFD22001,EC3,GB5001722003LRFD22003EC3c),3GB50017220031.23,EC3;LRFD22001,,EC3CB500172200316.6%,LRFD22001GB50017220031613%1(GB5001722003[S].:,20032EN1993Eurocode3Designofsteelstructures[S]3LoadandResistanceFactordesignSpecificationforStructuralSteelBuilding[S].AISC,20014,.(GB5001722002)[J].,2002,(6):522595,.[M].:,20026.()ASD[J].,1999,(6):14215297,,.[J].,1999,(5):342358,,,.[J].,2002,(1):512609.[J].,1998,(2):42245(34)1Pm2V1Pm3P()Pm3V=V1P126.63996.88868.51%141.422224.12478.30269.22%113.121313.25232.85973.34%44.803464.014208.049299.3454,,,,1.FoundationEngineering.:,1993,59026002GB5000722002,331:10©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.