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    Comparison Between Filled and Hollow X-Shape Plates in Dampers ADAS (Damping Ratio & Ductility Ratio & Energy Dissipation Ratio)

    مقارنة بين الصفائح المصمتة و المفرغة - بشكل حرف X- المستخدمة في المخمّدات المعدنية ADAS من حيث (نسبة التخامد & نسبة المطاوعة & نسبة تبديد الطاقة)

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     Added by Tishreen University ورقة بحثية
     Publication date 2015
      fields Structural Engineering
    and research's language is العربية
     Created by Shamra Editor


    ‎Shamra Academia - شمرا أكاديميا‎


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    Abstract in Arabic Abstract in English

    This article summarizes a numerical and mathematical comparison between filled and hollow X-shape plates to develop a new steel energy dissipative damper for structures protection of earthquakes. The plate is a weld from two ends. Energy is dissipated through flexural yielding when the plate is subjected to inelastic cyclic deformation. The performance of the plate was verified by five models by software ABAQUS and plastic mechanism analysis. Results showed that the plate exhibited stable hysteresis and dissipate energy with excellent values. It is Important to say all dimensions of plates and quality of steel are verified by international articles. This article's interest lies in studying the effect of openings on plate's dissipation energy.

    Artificial intelligence review:
    Research summary
    تقدم هذه المقالة دراسة عددية وتحليلية لمجموعة من الصفائح بشكل حرف X بهدف اختيار الصفيحة الأفضل للعمل كمخمَد معدني من النمط ADAS، والذي يهدف إلى امتصاص وتخميد الطاقة الزلزالية في الجمل الإطارية للمنشآت. يتم امتصاص وتخميد الطاقة من خلال دخول الصفيحة دفعة واحدة في مرحلة اللدونة تحت تأثير تشوهات قص دورية لا مرنة، على اعتبار أن الصفيحة مثبتة بوثاقة تامة من الطرفين. تم إثبات فعالية الصفائح المدروسة من خلال بناء خمسة نماذج حاسوبية ضمن بيئة برنامج ABAQUS ومقارنة النتائج مع نتائج التحليل للانهيار اللدن. أظهر التحليل اللاخطي أن جميع الصفائح تتمتع بسلوك هيستيري مستقر وتقوم بامتصاص الطاقة بدرجة ممتازة عند تعرضها لانتقالات دورية قسرية. تهتم المقالة بدراسة تأثير وجود فتحات صغيرة - دائرية وطولية - في هذه الصفائح لرفع جدوى التخميد بأعلى درجة ممكنة. النتائج أظهرت أن الصفائح ذات الفتحات الطولية مع فتحة في المركز (SL-5) كانت الأكثر فعالية في تبديد الطاقة، حيث بددت حوالي 1.5 كيلوجول من الطاقة، وكانت نسبة التخامد المكافئة لها حوالي 45%.
    Critical review
    دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة نحو تحسين أداء المخمدات المعدنية في المنشآت الزلزالية. ومع ذلك، يمكن الإشارة إلى بعض النقاط التي قد تحتاج إلى مزيد من التوضيح أو التحسين. أولاً، الدراسة تعتمد بشكل كبير على النمذجة الحاسوبية، ومن المفيد إجراء تجارب ميدانية للتحقق من النتائج. ثانياً، لم يتم التطرق بشكل كافٍ إلى تأثير العوامل البيئية مثل التآكل على أداء الصفائح المعدنية. ثالثاً، قد يكون من المفيد دراسة تأثير أنواع مختلفة من الفولاذ أو المواد الأخرى على أداء المخمدات. وأخيراً، يمكن تحسين الدراسة بإضافة تحليل اقتصادي لتكلفة تصنيع وتركيب هذه الصفائح مقارنةً بطرق التخميد الأخرى.
    Questions related to the research
    1. ما هو الهدف الرئيسي من استخدام الصفائح بشكل حرف X في المخمدات المعدنية ADAS؟

      الهدف الرئيسي هو امتصاص وتخميد الطاقة الزلزالية في الجمل الإطارية للمنشآت من خلال دخول الصفيحة في مرحلة اللدونة تحت تأثير تشوهات قص دورية لا مرنة.

    2. ما هي الطريقة المستخدمة في الدراسة للتحقق من فعالية الصفائح؟

      تم استخدام خمسة نماذج حاسوبية ضمن بيئة برنامج ABAQUS ومقارنة النتائج مع نتائج التحليل للانهيار اللدن للتحقق من فعالية الصفائح.

    3. ما هي الصفائح التي أظهرت أفضل أداء في تبديد الطاقة؟

      الصفائح ذات الفتحات الطولية مع فتحة في المركز (SL-5) أظهرت أفضل أداء في تبديد الطاقة، حيث بددت حوالي 1.5 كيلوجول من الطاقة.

    4. ما هي نسبة التخامد المكافئة التي حققتها الصفيحة SL-5؟

      نسبة التخامد المكافئة التي حققتها الصفيحة SL-5 كانت حوالي 45%.

    Keywords
    تبديد الطاقة المخمد المعدني ADAS التحليل اللاخطي اللامرن الصفائح بشكل X التشوهات اللدنة
    References used
    BERGMAN, D.M.; GOEL S.C. Evaluation of cyclic testing of steel plate devices for added damping and stiffness. Report no. UMCE87-10, Ann Arbor (MI, U.S.A), 1987
    BOARDMAN, P.R.; WOOD B.J.; CARR A.J. A cross braced structure with energy dissipaters. Bulletin of the New Zealand National Society for Earthquake Engineering, Vol.16, N.2, 1982
    CLARK, P.W; AIKEN, I.D.; TAJIRIAN F.; KASAI, K. Design procedures for buildings incorporating hysteretic damping devices, 1999
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