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Efficacy Of Strengthening R.C. Beams to resist Shear

فعالية تدعيم الجوائز البيتونية لمقاومة القص

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 Publication date 2017
and research's language is العربية
 Created by Shamra Editor




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Beams are considered as one of the most loaded concrete elements, which needs to be strengthened either as a result of insufficient of concrete section, or insufficient rebar or increased loads, or the result of a superficial steel or corrosion of internal steel reinforcement, and other reasons that we will mention them what we need to study this. The damaged structural elements and their inability to function fully as a result of exposure to different environmental factors damage materials and lead to lower resistance, or because of the existence of of an executive defects or inappropriate investment for its, leads to the need to rehabilitate maintenance and repair or reinforcement. So it was resorting to strengthen either magnify sections or supply necessary reinforcement or steel platelets linking external supported well to concrete section, and because of the difficulty of execution the recent studies has been implemented on the use of more efficient material which is concentrated fiber reinforced polymers. We will present here to methods of strengthening the shear up to the global studies conducted using these materials from polymers, which are characterized by high resistance to tensile and large resistance to environmental factors and weather conditions and ease of application in the specified permissible sites.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة فعالية تدعيم الجوائز البيتونية لمقاومة القص باستخدام مواد البوليميرات المسلحة بالألياف (FRP). الجوائز البيتونية هي عناصر إنشائية حاملة تتعرض لعوامل بيئية وأخطاء تنفيذية تؤدي إلى تضررها، مما يستدعي تقويتها. تقنيات التدعيم التقليدية تشمل زيادة أبعاد المقطع، الشد اللاحق، والربط بصفيحة فولاذية، بينما تشمل التقنيات الحديثة استخدام صفائح وشرائح FRP. الدراسة تستعرض مزايا وعيوب كل تقنية، وتقدم مقارنة بين فعالية تقنيات التدعيم المختلفة. النتائج تشير إلى أن تقنية NSM أكثر فعالية من EBR، وأن استخدام شرائح CFRP بزاوية 45 درجة هو الأكثر فعالية. توصي الدراسة باستخدام تقنيات NSM وCFRP لتدعيم الجوائز البيتونية لمقاومة القص.
Critical review
دراسة نقدية: تعتبر هذه الدراسة شاملة ومفيدة في مجال تدعيم الجوائز البيتونية لمقاومة القص، حيث تقدم مقارنة مفصلة بين التقنيات التقليدية والحديثة. ومع ذلك، يمكن توجيه بعض النقد البناء. أولاً، الدراسة تفتقر إلى تحليل اقتصادي مفصل لتكاليف كل تقنية، مما قد يساعد المهندسين في اتخاذ قرارات مستنيرة. ثانياً، لم تتناول الدراسة بشكل كافٍ تأثير العوامل البيئية المختلفة على فعالية مواد FRP على المدى الطويل. ثالثاً، يمكن تعزيز الدراسة بإضافة تجارب ميدانية أكثر لتأكيد النتائج المخبرية. وأخيراً، كان من الممكن تقديم توصيات أكثر تحديداً حول كيفية تحسين تقنيات التدعيم الحالية.
Questions related to the research
  1. ما هي الأسباب التي تستدعي تدعيم الجوائز البيتونية؟

    الأسباب تشمل عدم كفاية المقطع البيتوني أو حديد التسليح، زيادة الأحمال، صدأ التسليح الداخلي أو الخارجي، وتأثير العوامل البيئية المختلفة.

  2. ما هي التقنيات التقليدية لتدعيم الجوائز البيتونية على القص؟

    التقنيات التقليدية تشمل زيادة أبعاد المقطع، الشد اللاحق، والربط بصفيحة فولاذية.

  3. ما هي مزايا استخدام مواد FRP في تدعيم الجوائز البيتونية؟

    مزايا FRP تشمل مقاومة شد عالية، مقاومة كبيرة للعوامل البيئية والجوية، سهولة التطبيق، وخفة الوزن.

  4. ما هي التقنية الأكثر فعالية لتدعيم الجوائز البيتونية وفقاً للدراسة؟

    تقنية NSM باستخدام شرائح CFRP بزاوية 45 درجة هي الأكثر فعالية وفقاً للدراسة.


References used
ACI 318M-02,"BUILDING CODE REQUIREMENTS FOR STRUCTURAL CONCRETE (ACI 318M-02),AND COMMENTARY (ACI 318RM-02)",2003
ACI 440.1R-01, Emerging Technology Series, "Guide for the Design and Construction of Concrete Reinforced with FRP Bars", 2003
J.A.O. BARROS , S.J.E. DIAS , " Near surface mounted CFRP laminates for shear strengthening of concrete beams" , Cement and Concrete Composites Volume 28, Issue 3, March 2006, Pages 276 -292
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