دراسة سلوك الجيزان الفولاذية المغلفة بالبيتون ذاتي الاكتناز على الانعطاف تجريبيآ وتحليليآ

الموضوعات

علوم تطبيقية وتكنولوجية

روابط وملفات

التعريف والنوع

رقم الوثيقة

fed3645c-17db-426c-97ea-3aa3f2e25649

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

1957663_1.pdf

بيانات النشر

ترجمة العنوان

Study of the Flexural Behavior of Self Compacting Concrete Encased Steel Beams Experimentally and Analytically

ألقاب المؤلفين

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اللغة

Arabic

المصدر والدورية

اسم المصدر

دراسة سلوك الجيزان الفولاذية المغلفة بالبيتون ذاتي الاكتناز على الانعطاف تجريبيآ وتحليليآ

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

The encased steel sections with concrete contribute in increasing theirresistance of fire, prevent local buckling, resistance to lateral torsional buckling and an increased ability to resist corrosion in the steel beam. The encased by normal concrete may cause the cavity phenomenon, which is caused by the appearance of voids due to the lack of suitable vibration of the concrete after casting. Such problems can be overcome by using a new type of concrete such as self-compacting concrete.In this research, an experimental study on (12) beams which were encased by self-compacting concrete and normal concrete, and exposed to a flexure load at four points. The length of each beam was (2000 mm). Two steel sections (IPN140) and (UAP80) were used. Three amounts of cement in concrete mixtures were tested (350,400, 450 kg/m3). Theexperiments were conducted to determine the properties of the materials, such as the experiment of granular analysis, the sand equivalent, the tensile experiment of the samples of bars and steel sections. The experiments were conducted on self-compacting concrete to ensure that they conform to European recommendations. The pressure strength test was performed on concrete cubes of (150x150x150mm).Several types of cement and several water ratios were tested.The tensile strength test was conducted by simple bending on prism samples of (70x70x280mm),andcylinderseparation teston cylindrical sampleswith diameter (150 mm) and height (300 mm).A four-pointflexureexperiment was conducted on the encasedbeams,Failure load and the relationship between the load and deflection were determined in each beam.In addition, the distribution of cracks (number-width-spacing) was determined in the tested encased beams.The failure load and the relationship between the load and deflection were determined computationally in the tested encased beams by dividing the section into a large number of segments, and then calculating the internal forces affecting each segment according to type of material, with neglecting the contribution of the tight concrete when calculating the capacity.The calculatedresults were compared with theexperimentalresults. Theaveragedifference between the calculated and the experimental load was found. The relationship between the load and deflection in the encased beams werefound using the moment of inertia of the concrete cracked section. A correction factor (k) was proposed in the calculation deflectionequation.A new computer model based on numerical analysis was introduced,using one of the most advanced numerical modeling programs(ANSYS), which uses the finite elements method of analysis. The analytical results were compared with the experimental and computational results. Compatibility was appeared between the computational and analytical results with the experimental results after introduction the correction factor (k) in the calculation deflection equation.

كلمات الباحثين

البيتون ذاتي الاكتناز, سلوك الجيزان الفولاذية

إشراف وإعداد

الإشراف

محمد صفو

الإعداد

معتز حسين

الاقتباسات الببليوغرافية