دراسة تأثير بعض الوتغيرات على مقاومة القص في العناصر ذات الوقطع T -عادي ومقلوب- من البيتون عالي المقاومة

الموضوعات

علوم تطبيقية وتكنولوجية

روابط وملفات

التعريف والنوع

رقم الوثيقة

f83cc65f-4bc3-44cd-aebd-a44270771434

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

1957966_1.pdf

بيانات النشر

ترجمة العنوان

Studying the effect of some parameters on shear resistance in high strength concrete members with T section -normal and inverse-

ألقاب المؤلفين

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اللغة

Arabic

المصدر والدورية

اسم المصدر

دراسة تأثير بعض الوتغيرات على مقاومة القص في العناصر ذات الوقطع T -عادي ومقلوب- من البيتون عالي المقاومة

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

This study shows the test results of experimental study to evaluate the effect of compressed and tensioned flanges of T beams on shear strength of high strength concrete beams, the parameters in this study is : shape of cross section and compression resistance of concrete was taken at least (60Mpa), the distance between force and support also was taken at (a/d=1.8) and (a/d=2.7), Ratio of flange thickness to web width was ()and ratio of flange thickness to depth of the beam was ().A 78 simply supported beams without shear reinforcement were tested (6 rectangular beams , 36 normal T beams and 36 converse T beams) and loaded in two points. The results showed cracking loads and ultimate loads, also we measured deflections and strains in different points in each beam and we noticed types of failure and measured the width, length and angle of diagonal cracks in each beam.The results showed that the shear capacity of high strength concrete T beams is higher than its in rectangular beams by 31% for beams with (a/d=1.8) and by 40% for beams with (a/d=2.7), while in converse T beams their capacities were the same in rectangular beams at the ratio (a/d=1.8) and they increased by 25% at the ratio (a/d=2.7) .Also test results showed that the contribution of the flange doesn't restricted on increasing shear resistance but also on formation of cracks in the beams,so the depth of moment cracks isrelativelysmall by using the flanges.A mathematical study was made, and meanwhilethere is no any mathematical relationship available (except Russian code) that takes the effect of flanges on shear resistance of concrete and on deflections, so we developed equations to compute these deflection and cracks wide according to ACI318-05 and the results was similar to experimental results, then we developed a relationship to compute capacity of concrete beams by using Zustty equation which her results were the closest to our experimental results.Finally we normalized and analyzed test beamsby using finite element method in ANSYS program then we compared experimental results with mathematical results from our relationship and with results from ANSYS for deflections and shear capacity, and we found that our modification on Zustty equation gave a good convergence with experimental results then we put some conclusions and recommendations .

كلمات الباحثين

Beam, High strength concrete, Ratio of flange thickness to effective depth in T section, Ratio of distance between force and support to effective depth, Shear resistance, Types of failure, انماط الانهيار, بيتون عالي المقاومة, جائز, سبة بعد القوة عن المسند إلى العمق الفعال (, مقاومة القص, نسبة سماكة الجناح إلى الارتفاع الفعال في المقطع

إشراف وإعداد

الإشراف

نزيه منصور , أحمد عبود

الإعداد

الشريفة بهيجة آل الفضل

الاقتباسات الببليوغرافية