提高钢结构梁柱焊接节点抗震性能的探讨
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摘要
提高梁柱焊接节点的抗震性能是钢结构抗震设计的重要内容之一。美国北岭和日本阪神震灾教训表明,为防止梁柱焊接节点在地震中出现源于焊缝的脆性破坏,设计上应注意降低节点焊缝处的应力集中,改善焊缝的受力状态,设法利用钢材的塑性储备来吸收地震能量,并根据抗震设防要求和地震载荷特点选用韧性达标的焊接材料。制造和安装时还应注意消除节点焊缝处的各种应力集中,包括妥善处置引弧板和垫板。
It is one of the most important part to improve the performance of resisting to earthquake of beam-column welded joint.The earthquakes in Northridge,America and Koba,Japan manifest that in order to prevent beam-column connections from brittle destruction born of the welds in earthquake,it should be paid attention in design to decrease the stress concentration at welding joints,ameliorate the loaded situation for seam,absorb the seismic energy by use of plastic reservation possessed by steel,and choose the welding material,which the toughness reaches the requirements of standard according to the characteristics of seismic loading and demands of resisting to earthquake.It should also be took into account to eliminated the various kinds of stress concentration at welding joint in fabrication and installation,including dealing with weld tabs and the backing-bar appropriately.
It is one of the most important part to improve the performance of resisting to earthquake of beam-column welded joint.The earthquakes in Northridge,America and Koba,Japan manifest that in order to prevent beam-column connections from brittle destruction born of the welds in earthquake,it should be paid attention in design to decrease the stress concentration at welding joints,ameliorate the loaded situation for seam,absorb the seismic energy by use of plastic reservation possessed by steel,and choose the welding material,which the toughness reaches the requirements of standard according to the characteristics of seismic loading and demands of resisting to earthquake.It should also be took into account to eliminated the various kinds of stress concentration at welding joint in fabrication and installation,including dealing with weld tabs and the backing-bar appropriately.
引文
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2Songjianlin.SeismicofspecialmomentsteelframeswithweldedconnectionsJ.Journalofstructuralengineering,1999,1254:357-370.
3Songjianlin.Riskevaluationofspecialmoment-resistingframesunderearthquakeJ.Technicalcouncilonlifelineearthquakeengineeringmonograph,1999,168:456-468.
4WhittakerAndrewEvalutionofpre-northridgesteelmoment-resistingfromjoinJ.Structuraldesignoftallbuilding,1998,1711:897-912.
5KrawnklwerH.EarthquakedesignandperformanceofsteelstructureJ.Earthquakeengineering,1998,2911:285-296.
6Wei-MingChi.Fracturetoughnessdemandsinweldedbeam-columnmomentconnectionsJ.Journalofstructuralengineering2000,1:88-96.
7NakaShimaM.Classificationofdamagetosteelbuildingsobservedinthe1995Hyogoken-NanbuearthquakeJ.Eng-ineeringStructures,1998,204-6:271-281.
8DuaneMiller.LessonslearnedfromNorthridgeearthquakeJ.Engineeringstructures,1998,204-6:249-260.
9黄南翼.日本阪神地震建筑震害分析与加固技术M.北京:地震出版社,1999.
10杨尉彪.高层建筑钢结构梁柱节点试验研究J.建筑结构,2001,8:3-8.
11EgorPualPopov.Designofsteelmafconnectionsbeforeandafter1994northridgeearthquakeJ.Engineeringstru-ctures,1998,2012:1030-1038.
12刘其祥.高层房屋钢结构梁柱刚性连接节点抗震设计J.建筑结构,2001,8:9-12.
13陈宏.高层钢结构节点地震脆断机理及抗震性能研究C.清华大学博士论文,2001.
14NakashinaMasayoshi.Testofweldedbeam-columnsubass-embilitiesJ.Journalofstructuralengineering,1998,12411:235-268.
15石永久.高层钢框架新型梁柱节点抗震试验研究J.建筑结构学报,2002:6:2-7.
16JamesM.AnelasticcyclictestingofweldingunreinforcedmomentconnectionJ.JournalofStructuralEngineering2002,1284:429-440.
17Johnlgross.AconnectionmodelfortheseismicanalysisofweldedsteelmomentframesJ.Engineeringstructures,1998,204-6:390-397.
18CharlesW.GeneralIssuesInfluencingConnectionPerform-anceJ.JournalofStructuralEngineering,2002,1284:420-428.
19Yaoguochun.Numericalstressanalysisofcrackatweldedbeam-columnconnectionJ.Chinawelding,2000,211:30-35.
20姚国春.带人工裂纹的焊接钢结构节点的有限元分析J.机械强度,2001,1:47-49.
21Yinshuangzen.FratureanddamagetheorizedandtheirapplicationM.Beijing:Publishingoftsinghuauniversity,1992.
22Housnergeorgew.Steel-framebuildinginseismicregionsstructuresJ.Congress-proceeding,1995,43-5:235-256.
23Asaotoyoda.ProblemsrelatedtomaterialforavoidingfailureofsteelframedstructuresunderheavyearthquakeM.Pairs:iwJWRonbrittlefrature,1998.
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