DIANA钢筋混凝土框架填充墙加固抗震分析.pptx
《DIANA钢筋混凝土框架填充墙加固抗震分析.pptx》由会员分享,可在线阅读,更多相关《DIANA钢筋混凝土框架填充墙加固抗震分析.pptx(44页珍藏版)》请在沃文网上搜索。
1、Nonlinear FEAnalysis of RC Frames Infilled with RCWalls for Seismic Retrofitting in DIANAFEAElpida Georgiou-PhD CandidateSupervisor-Professor Christis Chrysostomou21 November 2017DepartmentDepartment of of CivilCivil EngineeringEngineering andand GeomaticsGeomaticsCUT is a a newnew statestate Univer
2、sityUniversity in Cyprus Growing within the historical city center of LimassolCUT was founded in 2004 and welcomed its first students in 2007 Offers academic degree programs at all levels(Undergraduate,Masters,PhD)17 Undergraduate Programs of Study 32 Graduate Programs of StudyTheThe facultyfaculty
3、of of EngineeringEngineering andand TechnologyTechnology Department of Electrical Eng.Computer Engineering and Informatics Department of Mechanical Eng.And Materials Science and Engineering Department of Civil Engineering and GeomaticsCYPRUS UNIVERSITY OF TECHNOLOGYGeneral dataThe youngest among the
4、 leadingYoung Universities in EuropeCyprus University of Technologybetween 350-400 in the world202 in EuropeIn less than 10 yearsOverviewResearch purposeProcedureExperimental studyGeometry,design,tests,resultsModel in DIANAFEAGeometry definition,elements,mesh,material models,loads,analysisDIANAFEAre
5、sults comparison with experimental resultsOutcomesFurther workDIANA FEA WebinarResearchPurposeStrengtheningStrengthening ofof existingexisting structuresstructures withwith RCRC infillsinfills withinwithin existingexisting framesframes Limitations in design and construction regardingthis method furt
6、her investigation is required Aparametric study is necessarySimulationSimulation ofof a a full-scalefull-scale Ps-DPs-D testtest in inDIANADIANA FEAFEA Numerical experiments Global&Local resultsContributionContribution ofof shearshear connectorsconnectors(dowels(dowels)Important component of the ove
7、rall shearresistance capacity of RC Not been yet analyzed adequately Complicated mechanism Not clear how to design themDIANA FEA WebinarOriginal FrameRetrofitted FramePrototypePrototype modelmodel-SERFIN project-Full-scale case study-Model correctly reflectsthe real situation-Results&dataDIANAFEAfor
8、DIANAFEAforsimulationsimulation-FEM of the frame torepresent the experiment-Validation with experimentalresults-Nonlinear hystereticbehavior of materials at thelocal level-Capture and evaluate thebehavior of RC infillsProcedureReliableReliable studystudy ofof anyanybuildingbuilding parameterparamete
9、r-Numerical experiments andparametric studiesDIANA FEA WebinarExperimentalstudySERIESSERIESS Seismic E Engineering R Research I Infrastructures of E European S Synergies European Commission,Framework Programme 7SERFINSERFIN projectSeSeismic R Retrofitting of RC F Frames with RC InInfilling First tim
10、e in the world a full-size test of this type of specimen 18 months(December 2013 July 2015)European Laboratory of StructuralAssessment(ELSA)of the Joint Research Centre inIspra(Italy)Important Experimental results&DataStructuralStructural EngineeringEngineering InternationalInternational JournalJour
11、nal ofof IABSE,IABSE,23(2),23(2),159-166,159-166,(2013)(2013)-http:/ ScientificScientific andand TechnicalTechnical ResearchResearch Reports,Reports,(2013)(2013)-https:/ec.europa.eu/jrc/en/publication/eur-scientific-https:/ec.europa.eu/jrc/en/publication/eur-scientific-and-technical-research-reports
12、/seismic-retrofitting-rc-frames-rc-infilling-serfin-project-series-transnational-accessand-technical-research-reports/seismic-retrofitting-rc-frames-rc-infilling-serfin-project-series-transnational-accessParticipants:Participants:Cyprus University of Technology CoordinatorUniversity of Nantes(France
13、)University of CyprusDENCO Design&EngineeringConsultants(Greece)DIANA FEA WebinarThespecimen-geometryMulti-storeyMulti-storey 4-storeys Total specimen height 12m-excluding the foundation Storey height 3mMulti-bayMulti-bay 3-bays Centre-line length of thespecimen was 8.5mRCRC infillinginfilling 2 end
14、 exterior frames only Spaced at 6m Linked by a 0.15m thick RC slaband 4 transverse beams 35x65 RC infill wall has the samethickness as the width of theframe members(0.25m)Central bay 2.5m/Two exteriorbays 3m(centre to centre)Columns 25x40,Beams 25x50DIANA FEA WebinarEASTEASTWESTWESTSOUTHSOUTHWALLWAL
15、LDesignDesign standardstandardTypical building inthe 70s-80s inCyprusNo specific design standardNo provisions forearthquakeCP110:1972,BS8110:1983LoadsLoadsGravity loads only(vertically loaded)Dead load:3kN/mLive load:1.5kN/mThespecimen-designMaterialsMaterialsConcrete C20/25 Unit weight 25kN/m E=30G
16、PaReinforcement steel fyk:400MPa existingstructure fyk:450MPa RC infilldowelsDIANA FEA WebinarThespecimendesigndetailsColumnsColumns reinforcementreinforcement 4Y20 longitudinal Spliced right above each slabwith 550mm length Y8/200 stirrupsColumn cross-sectionTransversalTransversal BeamsBeamsreinfor
17、cementreinforcement 2Y20 top 5Y20 bottom Y10/150 stirrupsReinforcement detailfor beamsLongitudinal beamcross-sectionTransversal beamcross-sectionReinforcement detailfor columnsLongitudinalLongitudinal BeamsBeamsreinforcementreinforcement 4Y12 top+bottom Y8/200 stirrupsDIANA FEA WebinarThespecimendes
18、igndetailsRCRC InfillsInfills&DowelsDowelsDifferent amounts of reinforcement for the infills With the north one being the stronger of the twoTwo distinct connection detailsWall reinforcement and connection detailsbetween the walls and the bounding frameDIANA FEA WebinarThespecimendesigndetailsDowels
19、 and starter barsDowels,starter bars andweb reinforcementDIANA FEA WebinarShort dowelsDowels and starter barsRCRC InfillsInfills&DowelsDowelsFirstFirst detaildetail StarterStarter barsbars Web bars connected with the surrounding framethrough lap splicing Same diameter starter bars Epoxy grouted into
20、 the frame members ShortShort dowelsdowels Transfer the shear at the interface between thewall and the frame memberThespecimendesigndetailsRCRC InfillsInfills&DowelsDowelsSecondSecond detaildetail LongerLonger dowelsdowels Act both as dowels and asstarter bars of the webreinforcement These dowels ar
21、e consideredas lap-spliced The clear distance between thedowel and the nearest web bar,violated the maximum cleardistance of 50mm or 4between lapped bars(Specifiedin Eurocode 2(CEN,2004)DowelsDowels and webreinforcementDIANA FEA WebinarDowelsThespecimendesigndetailsDowelsDowels firstfirst detaildeta
22、il waswas usedused toto connectconnect thethe wall:wall:Bottom beam 2nd floor bottom beam Left(west)column of the ground floor Right(east)column of the 1st floorDowelsDowels secondsecond detaildetail waswas usedused toto connectconnect thethe wall:wall:Top beam of the all floors Bottom beam of the 3
23、rd and 4th floors Left(west)of the 2nd,3rd,and 4th floors Right(east)of the 1st,3rd and 4th floorsDIANA FEA WebinarThespecimendesigndetails3-sided CFRP reinforcement jacket to reinforce theedges of the wall at the ground floorThis additional retrofit on the lap length is crucialand constitutes part
24、of the proposed retrofitstrategy to avoid premature tensile lap-splicefailureDIANA FEA WebinarThespecimen-transducers 108 Displacementtransducers 22 Inclinometers 8 Heidenhain linearencoders Elongation/Shortening Rotations Beam supports(Opening/Closing)Beam-middle(Slip)Column(Slip)Shear DeformationD
25、IANA FEA WebinarActuator attachment beamsThespecimen-testsHorizontalHorizontal loadingloadingUni-directional pseudo-dynamic(Ps-D)testing 0.1g acceleration 0.25g accelerationCyclic Displacement history was imposed at the top storey Triangular distribution of forces was imposed 92,-92,89,-125,37,0(mm)
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
20 积分
下载 | 加入VIP,下载更划算! |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- DIANA 钢筋混凝土 框架 填充 加固 抗震 分析