پديد آورنده :
اخلاقي، عليرضا
عنوان :
بررسي تحليلي تير به ستون پيش ساخته بتني هيبريد تحت اثر تركيب بارهاي قائم و جانبي
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران
صفحه شمار :
ده،{II}ص:مصور،جدول،نمودار
يادداشت :
ص.ع به :فارسي وانگليسي
استاد راهنما :
عليمحمد مؤمني
استاد مشاور :
محمد مهدي سعادت پور
توصيفگر ها :
سيستم هاي سازه اي , اتصال هيبريد , آرماتورگذاري
تاريخ نمايه سازي :
23/1/1388
استاد داور :
عليرضا شهيدي، مرتضي مدح خوان
تاريخ ورود اطلاعات :
1396/09/11
چكيده فارسي :
به فارسي وانگليسي:قابل رؤيت در نسخه ديجيتال
چكيده انگليسي :
Abstract Precast concrete frame construction is not used extensively in high seismic regions despite its potential benefits in construction speed and quality control The new type of framehas been developed recently for resisting seismic loads in buildings It consists of precastconcrete beams and columns that are joined by a combination of conventional steel reinforcingbars and unbounded post tensioned tendons The clamping force between the beam and thecolumn provides vertical shear force transfer at the interface between the beam and thecolumn so the corbel is not needed The mild steel bars are placed in ducts and grouted intosleeves at the top and bottom of the beam which extended through the columns They areplaced at the top and bottom of the beams because this would maximize the dissipation ofenergy through cyclic yielding in tension and compression In order to protect mild steel fromfracture and to reduce the strain in it they are debonded at the beam column interface regionfor a short length This study focuses on analytical investigation of hybrid precast beam column concreteconnections subjected to lateral loading 3 D nonlinear finite element was developed to studythe response and predict and validate experimental results for O P Z4 specimen Theexperiments were conducted at NIST The results from the FE model accurately predictedactual strain levels in the mild steels and force in the PT tendon The force displacementenvelope was also in satisfactory agreement with experimental result Upon the validation of experimental work the behavior of monolithic and hybridspecimens with identical characteristic were evaluated Furthermore effective functions in thebehavior of hybrid connections including the amount of the PT tendons contribution in beammoment strength and initial post tensioning force were investigated The results fromnonlinear analysis in ANSYS showed that elastic and plastic stiffness of hybrid frames withany amount of PT tendons contribution in beam moment strength or initial post tensioningforce were greater than monolithic frame Also the elastic stiffness of hybrid framesincreased with growing of initial post tensioning force and decreased with raising the amountof the PT tendons contribution The plastic stiffness of hybrid frames increased withincreasing the amount of PT tendons contribution and decreased with raising the initial post tensioning force Hybrid frames yield load with any arrangement of mild steel bars and PTtendons were greater than monolithic frame and with raising the strand effective stress theyield load decreased The same results were obtained for post yield loads In a new approach rotation analysis was used in order to compare the ANSYS results withthis new method The results from this method showed good agreement with software results The post yield prediction of this method from the behavior of hybrid connections wasconservative and leaded to smaller post yield stiffness than software The results lead us to theconclusion that the rotation analysis is suitable for designing and modeling the hybrid framesystems
استاد راهنما :
عليمحمد مؤمني
استاد مشاور :
محمد مهدي سعادت پور
استاد داور :
عليرضا شهيدي، مرتضي مدح خوان
