EXPERIMENTAL AND NUMERICAL INVESTIGATION ON SHEAR TRANSFER OF CONCRETE BLOCKS STRENGTHENED WITH CFRP SHEETS UNDER TENSILE FORCE

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

Shear strength which is transmitted across a specific shear plane is denoted as shear transfer.Examples of such situations are precast concrete connections, brackets, corbels, members withdeep beam where pure or direct shear is more likely to occur, Column footing connectionssubjected to high shear forces and concrete cast at different ages are other example. This study presents experimental and numerical investigations that concern the behavior ofpull-off for normal and high strength concrete specimens strengthened with various configurationsof carbon fiber reinforced polymer (CFRP) sheets. Eighteen samples cast and tested according to the study program. The parametersinvestigated are: the first was the strength of concrete by casting nine of samples as normalstrength concrete and nine as high strength concrete. The results have shown that the ultimatestrength are increased and the deformations are decreased in case of high strength concrete andreached to 33% larger than that of the normal concrete. The second parameter is the ratio ofreinforcement crossing the shear plane. The results have shown that the reinforcement increasesthe ultimate strength when compared with blocks without reinforcement, which reached to 22% incase of normal concrete reinforced by 2∅6mm bars, 30% in case of normal concrete reinforced by2∅10mm bars, 17% in case of high strength concrete reinforced 2∅6mm bars, and 23% in case ofhigh strength concrete reinforced by 2∅10 mm bars. The third parameter was the CFRPstrengthening configuration. The result shows that the strengthening led to increase ultimatestrength up to 20% in case of normal concrete strengthened in direction perpendicular to the shearplane, 17% in case of high strength concrete strengthened in direction perpendicular to the shearplane , 33% in case of normal concrete strengthened in direction parallel to the shear plane and27% in case of high strength concrete strengthened in direction parallel to the shear plane wherethese comparisons done with same reference specimens. Also finite elements analysis a three dimensional with eight noded elements to representconcrete have been used together with embedded bar elements to represent the reinforcement. Theanalysis took into account the nonlinear behavior of concrete in compression, tension and thereduction of the shear modulus due to cracking. A good agreements are issued from FEA with theexperimental results with differences at ultimate stages are less than 10%.

روابط وملفات

التعريف والنوع

رقم الوثيقة

efe28954-8766-4ac6-8265-e7f965e37b71

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

2308324_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"اكرم شاكر محمود","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"عبدالقادر اسماعيل الحديثي","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"ياسمين سعد عبدالحميد","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

EXPERIMENTAL AND NUMERICAL INVESTIGATION ON SHEAR TRANSFER OF CONCRETE BLOCKS STRENGTHENED WITH CFRP SHEETS UNDER TENSILE FORCE

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

اكرم شاكر محمود, عبدالقادر اسماعيل الحديثي

الإعداد

ياسمين سعد عبدالحميد

الاقتباسات الببليوغرافية