某钢结构单层工业厂房雪灾倒塌分析

195201010JOURNALOFNATURALDISASTERSVo.l19No.5Oc.t2010:2009-01-27;:2010-03-16:(305011);(IRT0619);(2008FJ3122):(1971-),,,.E-mai:[e-mail]:1004-4574(2010)05-0119-06张望喜,易伟建(,410082):,,(),,,,:;;;;:TU352:AAnalysisofanonestoryindustrialfactorybuildingcollapsedduringsnowdisasterZHANGWangxiYIWeijian(TheCivilEngineeringCollegeofHunanUniversity,Changsha410082,China)Abstract:Basedonthespotinvestigationofacertainone-storysteelindustrialfactorybuildingcollapsedduringsnowdisaster,thedamagestateofthestructuralmembersinthebuildingwasdescribedindetai.lTheinternalforcesandstressesofthesteelrooftrussunderdeadloadsandliveloadswerecalculatedbymeansoffiniteelementmethod,inordertoclarifythecollapsecausesofthesteelindustrialfactorybuilding.Thenumeralsimulationanalyticsolutionisinagreementwiththeresultofspotinvestigation.Somemeaningfulconclusionsandinspirationareobtainedfromthefurtheranalysisofanticollapseofbuildingagainstsnowdisaster.Keywords:snowdisaster;collapse;fieldinvestigation;calculationanalysis;inspiration,:,,,,,,,,,,,,,(GB50009-2001),,50a,,,(),,,,,,,:,,,,!∀,,!∀,,1200812,,,,,15m,6m,7.5m,2007,,11Fig.1Planofcolumnarrangement,,,,,,,,,,,,3mm,,,1.5mmQ345,,22(1),:1):0.376mm,,0.5mm;2):2(100#40#20),1.5m;3):1.5mm3.0mm;4)3(2)(3),4SAP2000,PIPE,CIRCLE,∃120∃19(GkQk)2Fig.2Photoofcollapsedfactorybuildingonspot3Fig.3Elevationsketchofrooftruss4Fig.4Calculationdiagram(3)6.0m:1)Gk(kN)∃121∃5,::785#1.5#6.0#0.0005=0.353:78.5#0.0072#6.0=3.391:0.353+3.391=3.744()2)Qk(kN):0.5#1.5#6.0=4.5(4),,1,0.5kN/m2,15mm3.0mm,598.8MPa326.7MPa1Table1Calculationsofinternalforceinsteeltubeoflowerchordatedgeofsupport/mm/kN∃m/kN/MPa1.50.0424-34.397279.90.0406-40.260318.9598.83.00.0370-36.643154.50.0308-42.421172.2326.73,,:(1)0.5kN/m2,1.5mm3.0mm,()598.8MPa326.7MPa(2),:2Table2Summaryofpredictedfeaturesofsteelroof/mm1.53.0Q235Q345Q390Q4200.5kN/m2Q235Q345Q390Q4202,1.5mmQ235,,,,Q3450.5kN/m2,3.0mmQ345,,,,,1~1.50.5%~1%,!∀99%~99.5%,:(1)0.8kN/m2,0.5kN/m2(2)3mm(3),,0.9!∀,,,∃122∃194(GB50009-2001)3,S,S(1):S=GSGk+Q1SQ1k+ni=2QiciSQik(1)(2)S=GSGk+ni=1QiciSQik(2):G%%%,:,,1.2;,1.35;,10;Qi%%%i,QiQ1,1.4;SGk%%%Gk;SQik%%%Qik,SQik;ci%%%Qi,;n%%%,,::1.2#+1.4#max(,);:1.35#+1.4#0.7#max(,),:0S&R(3):0%%%,1.0,0.9;R%%%,(1.1),,():(1)[max(,)#1.4+(1.2-1.0)#]#1.1;(2)[max(,)1.4#0.7+(1.35-1.0)#]#1.1,0.5kN/m22.0kN/m23.0kN/m2,,,30a50a0.300.40,,0.5kN/m2,,,0.9,0.7kN/m2,1%,,!∀,,,,!∀,,,:,5,:(1)0.5kN/m2,1.5mm3.0mm,598.8MPa326.7MPa;(2)1.5mmQ235,,,,,;0.5kN/m2,3.0mmQ345,,∃123∃5,:,,,08kN/m2,0.5kN/m2,(3),:[max(,)#1.4+(1.2-1.0)#]#1.1;[max(,)1.4#0.7+(1.35-1.0)#]#1.1(4),,,0.7kN/m2,(5),,!∀,!∀,!∀!∀(6),,,,(7),,,:[1],,,.[J].,2007,16(4):43-48[2].2007[J].,2007,(4):33-35[3],,,.%%%[J].,2007,16(4):103-109[4],.%%%[J].,2005,14(3):124-129[5],.[J].,2001,10(1):114-119[6],,,.[J].,2006,25(5):96-101[7],,.[J].,2000,9(4):35-38∃124∃19