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Journal of Al-Azhar University Engineering Sector
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Elharouney, B., Hussein, A., Mostafa, E., Elnemr, A. (2019). FLEXURAL BEHAVIOR OF PRESTRESSED CONCRETE BEAMS STRENGTHENED BY NEAR SURFACE MOUNTED FRP RODS. Journal of Al-Azhar University Engineering Sector, 14(53), 1424-1435. doi: 10.21608/auej.2019.64241
Belal Hesham Elharouney; Ayman Hussein; Ezz El-Deen Mostafa; Amr Elnemr. "FLEXURAL BEHAVIOR OF PRESTRESSED CONCRETE BEAMS STRENGTHENED BY NEAR SURFACE MOUNTED FRP RODS". Journal of Al-Azhar University Engineering Sector, 14, 53, 2019, 1424-1435. doi: 10.21608/auej.2019.64241
Elharouney, B., Hussein, A., Mostafa, E., Elnemr, A. (2019). 'FLEXURAL BEHAVIOR OF PRESTRESSED CONCRETE BEAMS STRENGTHENED BY NEAR SURFACE MOUNTED FRP RODS', Journal of Al-Azhar University Engineering Sector, 14(53), pp. 1424-1435. doi: 10.21608/auej.2019.64241
Elharouney, B., Hussein, A., Mostafa, E., Elnemr, A. FLEXURAL BEHAVIOR OF PRESTRESSED CONCRETE BEAMS STRENGTHENED BY NEAR SURFACE MOUNTED FRP RODS. Journal of Al-Azhar University Engineering Sector, 2019; 14(53): 1424-1435. doi: 10.21608/auej.2019.64241

FLEXURAL BEHAVIOR OF PRESTRESSED CONCRETE BEAMS STRENGTHENED BY NEAR SURFACE MOUNTED FRP RODS

Article 19, Volume 14, Issue 53, Autumn 2019, Page 1424-1435  XML PDF (5.99 MB)
DOI: 10.21608/auej.2019.64241
Authors
Belal Hesham Elharouney1; Ayman Hussein2; Ezz El-Deen Mostafa2; Amr Elnemr3
1Structural design engineer at ASGC, Misr algadida, Cairo, Egypt
2Structural Engineering Department, Faculty of Eng., Ain Shams University, Cairo, Egypt
3Structural Engineering Department, German University, Cairo, Egypt
Abstract
The applications of post tensioned concrete have increased and have now been used in
different regions of the world. There are only few studies which have studied the behavior of
retrofitted prestressed concrete experimentally, with the major part of the studies focusing on
retrofitted reinforced concrete. This research study is initiated by a desire to more fully
investigate the response of it. This paper presents a parametric study established on a beam
with T-sec with web width 700 mm and a height of 1800mm, the thickness of the flange is
150 mm, the width of beam flange is 1500mm with span 29.6m. The beam was simply
supported and loaded uniformly. A total no. of 20 finite element 3D models was generated
taking the all possible failure modes such as FRP rupture, concrete cover separation and
concrete crushing in order to study percentage of prestressing steel (Wp) parameter. Finally, a
comparison is done between ACI 440.2R-08 code and the finite element results for the
ultimate failure load and the predicted failure mode 0.
 
تطبيقات الخرسانة سابقة الإجھاد أصبحت واسعة الانتشار في کل إنحاء العالم وخاصة في الکباري الخراسانية ذات البحور
الطويلة في حدود ٣٠ إلي ٤٠ متر لذلک کان لابد من دراسة تدعيم او تقوية ھذا النظام باستخدام الفيبر المسلح المدفون
بالقرب من السطح.في الوقت الحالي کانت غالبية الدراسات ترکز علي تدعيم الخرسانة المسلحة ويوجد حاليا دراسات
بسيطة تطرقت الي ھذا المجال عمليا فقط لذلک ترکزت ھذه الدراسة علي الناحية النظرية و التمثيل الدقيق لسلوک الکمرة
المدعمة للحصول علي حمل الکسر وتحديد نوع الانھيار.جميع ھذه الکمرات لھا ارتفاع ثابت ھو ١٨٠٠ مم وعرض جزع T-section تم عمل دراسة نظرية علي کمرة بقطاع
الکمرات ٧٠٠ مم وسمک الشفة العلوية (البلاطة) ١٥٠ مم و بعرض ثابت قدره ١٥٠٠ مم .وتم تدعيم ھذه الکمرات
بالقضبان البوليمارية المدفونة بالقرب من السطح بإعداد مختلفة وکانت الکمرة بسيطة الارتکاز محملة بحمل موزع.
تدرس تأثير النسبة المئوية لکابلات سابقة الشد في ABAQUS حيت تم عمل 20 نموذج تحليلي باستخدام برنامج ال
ACI 440.2R- القطاع.ولکي يتم تقييم النتائج النظرية تم عمل مقارنة حمل الانھيار ونوع الانھيار بين الکود الأمريکي 0.8
Keywords
Posttensioned beam; FRP; NSM; reinforced concrete beams; Strengtheningکمرة لاحقة الشد – الفيبر المسلح بالبوليمر-الالياف المدفونة بالقرب من السطح- کمر مسلح-التدعيم
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