我国混凝土结构火灾_高温_后损伤机理与评估方法的研究进展和发展趋势

(2)JournalofBuildingStructures(SupplementaryIssue2)基金项目:国家自然科学基金项目(50778134),土木工程防灾国家重点实验室基金项目(SLDRCE09D02)作者简介:陆洲导(1957)男,上海人,工学博士,教授Emai:[e-mail]收稿日期:2009年9月()陆洲导,苏磊(同济大学结构工程与防灾研究所,上海200092):,(),(),,,,,:;;;;:TU375.01:ATheChineseresearchprogressondamagemechanismandevaluationmethodofconcretestructureafterfireinChinaLUZhoudao,SULei(ResearchInstituteofStructuralEngineeringandDisasterReduction,TongjiUniversity,Shanghai200092,China)Abstract:BasedoncomparativeandanalyticalinvestigationontheresearchworkconductedinChina,thepaperreviewstheresearchachievementsonthefiredamageassessmentandrehabilitationofconcretestructuresduringthepast30years.Itstartswiththefiredamagedcharacteristicsofconcretestructures.Somebasictheoriesonthethermalandmechanicalpropertiesofconcreteandmechanicalbehaviorsofsteelbarsafterelevatedtemperature(fireexpose)arepresented,aswellasexpermientalmethodsandtheanalysisways.Thentheresearchachievementsonconcretemembersandstructuresafterelevatedtemperaturearesummarizedincludingmechanicalproperties,seismicbehaviorsanddurability.Finally,theprogressofdamageassessmentmethodsafterfireispresented.Prospectsareputforwardonfourfieldsincludingdamagemechanism,damageanalysismethods,newmaterialsandevaluationmethods.Keywords:concretestructure;fire;damageassessment;rehabilitation;researchprogress0,[1],[2],,,,(),:(1):;(2):,,:202;(3):,,;(4):,,,,,;;;,,,,:(1);(2);(3),,11.1,,[36]200,,CSH300,,,,,4,,,,,,,[7]X,,,,,,,[8],ASTM[9],[10]1997~1999100mm!100mm!300mm0.5/min,,R,,[1112]19992001,(60),,2000()[13],1.2,,[36],,300,20%~40%;,,,[34],:(1),,;(2),,,203;(3),;(4),(400),3001,1001987~1990∀#∃%:9[35][5],20~8009,30min,,[9][14,2122]2001~2003∃%,,,[2324]20~7008,2h,∃%∃%∃%∃%∃2h1h,%[25](;3),355,[26]1997C40C6044[2729],5:,0.4,,,,PP[3031][3236][34]1Table1Changesinstrengthofconcreteafterhightemperature()[6]()[6][14][15][1617][18]()[19]()[20]1001.001.0001.001.001.001.001.001.002000.950.9720.953000.900.9050.820.890.940.760.940.984000.760.7695000.630.6300.600.700.640.500.630.646000.550.5050.570.307000.470.3320.500.200.280.150.138000.200.1720.250.130.17204,[35],[3536],,,,[3738],[39],,,,[4043],,,[44][45]200300,,1.3,[46](),,,,,[47],,,,,80010%[48],,,,,,[49]129Z,,,1.4[50]32,,[5152],,[53];[26]645;[2729]4,,;[54],,30%~40%,[55],,250∃%∃%,450650∃%∃%,8507d,,19891997[5663]3,;;,[63],()[5662],,:,,,:(1),,205;(2),;(3);(4),2,,,,,,,,,,[64]PH12~13,,,,,[64],[65]400~800518,,[66]100mm!100mm!100mm100~9009C30,1.5h,,[7]X,,,,,,,[8],,,[24][67][68][69][70],,,,,,,,,,,,,,[71],[7273],20200400600800C25C35C50,,,,,,,,,,,,,,,,70mm100mm15mm,,,,[6],,,,206,[74],,,30%~40%,,,,,,,,,:(1),;(2),,,;(3)3(),,,,,:,,,,():(1):,,,,;,(2):,,,,,;,,;,(3):,(4):,,,,,;,,,,[1],,,.[M].:,1995.[2],,,.[M].:,1995.[3].[D].:,1989.[4],,.[R].:,1990.[5],,.[R].:,1991.[6].[D].:,2007.[7],,,.[J].,2003,6(2):135141.[8],,.[J].:,2007,30(2):207209.[9]ASTME39990.Standardtestmethodforplanestrainfracturetoughnessofmetallicmaterials[S].AmericanSocietyofTestingMaterials,1997.[10]PengGF.Evaluationoffiredamagetohighperformanceconcrete[D].HongKong:TheHongKongPolytechnicUniversity,2000.[11].[D].:207,2001.[12],,,.[J].,2001,29(6):9498.[13],.[J].,2000,19(4):408411.[14],.[R].:,2003.[15].[D].:,2002.[16],.[M].:,2003.[17].[D].:,1992[18],,.[J].,1991,17(2):14[19].[D].:,2002.[20].[D].:,2002.[21],,.[M].:,2003.[22],,.[J].,2005,34(8):13.[23],,.[J].,1991,17(2):15.[24],.[J].,1991,19(4):2226.[25],,.[J].,2004,25(1):6370.[26],.[M].:,1994.[27],,.[J].,1997,17(3):3643.[28].[D].:,1997.[29],,.[J].,1999,20(5):4249.[30],,,.[J].,2002,11(2):6569.[31],,.[J].,2000,33(2):812.[32],,.[J].,2003,6(2):182189.[33],,.[J].,2001,31(6):5356.[34],.[J].,2006,9(3):255259.[35].[D].:,2006.[36],,,.[J].,2003,31(2):186190.[37],.[J].,1998,32(5):597602.[38],.()[J].(),1996(z1):5458.[39],,.[J].,2000,18(2):1316.[40],,.[J].,2005,38(10):97101.[41].[D].:,2003.[42],,,.[J].,2005,45(1):113117.[43],,,.[J].,2006,23(1):112116.[44],,.[J].,1994,20(1):4750.[45].[J].,1996,26(5):3336.[46],,.()[J].,1991,17(2):59.[47].[D].:,1996.[48],.[J].,1995,25(5):3740.[49],,.[J].,2004,21(4):133138.[50],,.[J].,2008,40(12):18611867.208[51],,.[J].,2005,8(2):145149.[52],.[J].,2005,35(8):9396.[53],.[J].,1992,29(2):6567.[54],,,.CFRP[J].,2005,37(1):98100.[55],,,.[J].,2009,38(1):2529.[56],,.[R].NSC770410E01109,:,1989.[57],,.[R].NSC770410E01113,.,1990.[58],.[R].NSC770410E01121,:,1997.[59],.[J].,1996,8(3):371386.[60],,.[R].NSC770410E01113,:,1990.[61],鏞.钢筋混凝土梁火害后力学行为研[R].NSC770410E01109,:,1989.[62],.[R].NSC770410E01109,:,1992.[63],.[R].NSC770410E01113,:,1989[64],.[J].,1995,25(12):3741.[65].[J].:,1996,17(1):3539.[66],,.[J].,1998,1(2):175181.[67],,.[J].,2001,31(12):4647.[68],,,.[J].,2002,154(8):2123.[69].[J].:,1996,17(1):3539.[70],,,.[J].:,1998:421427.[71].[D].:,1994.[72],.[J].,2006,22(4):8185.[73],,.[J].,2006,36(1):8890.[74],,,.RC[J].,2005,27(4):2729.209