3334

3194

كارشناسي ارشد

﴿ سازه ﴾

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1385

ده، 122، [II] ص.: مصور، نمودار، جدول

ص. ع. به فارسي و انگليسي

فرهاد بهنام فر

بيژن برومند

حميد هاشم الحسيني، بهروز كوشا

1396/03/01

كتابنامه

عمران

مهندسي عمران

ID3194

به فارسي وانگليسي : قابل رؤيت در نسخه ديجيتال

Abstract Two way slabs have a lot of usage in many structure systems because of theirspecial behavior and properties Two way slabs can supply longer spans with a thinthickness in the compare with other structural systems But they have some specialdisadvantages in design and serviceability Large deflections and serviceability problemsand weakness against lateral loads are the main of these disadvantages Slabs have sometypes based on their conditions Based on the presence or absence of the beam slabsdivide in to categories flat slabs and beam slabs At this study the flat slabs arediscussed Because of absence of rigid structural member in the joint of the flat slab andcolumn all of the applied load should be transferred via the joint of flat slab and columnthat causes a complicated distribution of stresses in the joint Presence of some additionalapplied loads such as moment transfer complicates it more Punching shear and attemptto prevent it to happen is a great challenge in the design of flat slabs and is an importantCriteria for designers Sometimes the changes in usage design and practical errors concrete damages steel corrosion changes in design codes creation an opening andsome other reasons implement the strengthening of an existing joint The strengtheningof these joints includes some techniques such as use of stud steel plates or FRPcomposites The main concentration of this thesis is on the use of FRP laminates toincrease the punching shear capacity of flat slab joints For this purpose nonlinear modelof concrete has developed in the finite element application ANSYS After calibration ofthe program and verifying the results of the models of one beam and two flat slab columnjoint with experimental results a model of joint designed for experience of punchingshear was modeled in the application After determination of the effect of efficientparameters on the modeling of joint and achieving a suitable model FRP laminates addedto the model in different arrangements The effect of different parameters on the joint hasbeen studied The results shown that in the samples designed for experience of punchingshear the strengthening with FRP laminates do not change the mechanism of failure Theultimate load of the joint increases by the use of FRP laminates But the ultimatedisplacement of the joint will be decrease in the presence of FRP laminates One way toprevent this disadvantage effect on the ultimate displacement is the use of studs in nearthe column The use of studs decreases the undesirable effect of FRP laminates on theultimate displacement The results have shown that the use of FRP laminates can increasethe ultimate load of the joint up to 80 percent depending on the original properties of thesample and the rehabilitation procedure

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حميد هاشم الحسيني، بهروز كوشا