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Strengthening of Masonry Arches under Vertical Loads Using Fiber Reinforced Polymer (FRP)

تقـوية الأقواس الحجـرية تحت تـأثير الأحمال الشــاقولية باستعمال البوليميرات المسلحة بالألياف (FRP)

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 Publication date 2012
and research's language is العربية
 Created by Shamra Editor




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It is well known that arch is a main part of the historical structures. Therefore, many techniques are used to strengthen these arches. In this paper, Fiber Reinforced Polymer (FRP) is used to reinforce the arch under vertical loads. Materially Non-Linear Analysis (MNLA) is performed to demonstrate the behavior of the arch with and without the FRP. On the other hand, the effect of FRP lamina thickness and length is undertaken in this research. This paper shows that a small amount of the FRP to some local areas can enhance the ultimate strength of the arch significantly.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة تأثير استخدام البوليميرات المسلحة بالألياف (FRP) في تعزيز قدرة التحمل الحدية للأقواس الحجرية تحت تأثير الأحمال الشاقولية. تم استخدام النمذجة العددية وفق طريقة العناصر المحدودة (Finite Element Analysis) مع تحليل لاخطي يأخذ في الاعتبار لاخطية المادة. أظهرت النتائج أن استخدام سماكة صغيرة من شريحة الـ FRP في أماكن محددة يمكن أن يرفع قدرة تحمل القوس بشكل كبير. تم إجراء مقارنة بين النتائج العددية والنتائج التجريبية السابقة، حيث أظهرت الدراسة أن استخدام الـ FRP يزيد من قدرة التحمل بنسبة تصل إلى 175%. كما تم دراسة تأثير تغيير الخصائص البعدية لشريحة الـ FRP مثل الطول والسماكة، وأظهرت النتائج أن زيادة الطول والسماكة تؤدي إلى تحسين قدرة التحمل حتى حد معين، بعده تبدأ القوة الحدية بالتراجع.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في مجال تعزيز المنشآت الحجرية باستخدام البوليميرات المسلحة بالألياف (FRP)، حيث تقدم حلاً فعالاً لزيادة قدرة التحمل للأقواس الحجرية. ومع ذلك، يمكن توجيه بعض الانتقادات البناءة للدراسة. أولاً، لم تأخذ الدراسة في الاعتبار التماسك بين شريحة الـ FRP والحجر بشكل كامل، مما قد يؤدي إلى نتائج غير دقيقة في بعض الحالات. ثانياً، تم نمذجة المادة الحجرية كمادة واحدة دون التمييز بين القطع الحجرية والمونة، وهو ما يمكن أن يؤثر على دقة النتائج. يوصى في الأبحاث المستقبلية بنمذجة القطع الحجرية والمونة بشكل منفصل وأخذ التماسك بين الحجر وشرائح الـ FRP بعين الاعتبار لدراسة التصرف الحقيقي للقوس بعد الوصول إلى قدرة التحمل الحرجة.
Questions related to the research
  1. ما هو الهدف الرئيسي من استخدام البوليميرات المسلحة بالألياف (FRP) في هذه الدراسة؟

    الهدف الرئيسي هو تعزيز قدرة التحمل الحدية للأقواس الحجرية تحت تأثير الأحمال الشاقولية.

  2. ما هي الطريقة التحليلية المستخدمة في هذه الدراسة؟

    تم استخدام النمذجة العددية وفق طريقة العناصر المحدودة (Finite Element Analysis) مع تحليل لاخطي يأخذ في الاعتبار لاخطية المادة.

  3. ما هي النتائج الرئيسية التي توصلت إليها الدراسة بشأن تأثير سماكة وطول شريحة الـ FRP؟

    أظهرت النتائج أن استخدام سماكة صغيرة من شريحة الـ FRP في أماكن محددة يمكن أن يرفع قدرة تحمل القوس بشكل كبير، وأن زيادة الطول والسماكة تؤدي إلى تحسين قدرة التحمل حتى حد معين، بعده تبدأ القوة الحدية بالتراجع.

  4. ما هي التوصيات التي قدمتها الدراسة للأبحاث المستقبلية؟

    يوصى بنمذجة القطع الحجرية والمونة بشكل منفصل وأخذ التماسك بين الحجر وشرائح الـ FRP بعين الاعتبار لدراسة التصرف الحقيقي للقوس بعد الوصول إلى قدرة التحمل الحرجة.


References used
BS EN 1996-1-1:2005. EUROCODE 6- Design of Masonry Structures، Part 1-1: General rules for reinforced and unreinforced masonry structures. Brussels: CEN، 2005، 124
BEUERMAN، T.E. Inventory of Repairing and Strengthening Techniques for Masonry Arch Bridges. Master’s Thesis، University: (Universitat Politècnica de Catalunya)، Spain، 2009، 106
BJURSTROM، H.; LASELL، J. Capacity Assessment of a Single Span Arch Bridge with Backfill. Master’s Thesis، Royal Institute of Technology (KTH)، Stockholm، Sweden، 2009، 101
SANSHEZ، I.B. Strengthening of arched masonry structures with composite materials. Ph.D. Thesis، University of Minho، Department of Civil Engineering، Portugal، 2007، 232
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