33 USING NONLINEAR FINITE ELEMENT AND YIELD LINE THEORY IN SOLVING TWO WAY SOLID SLABS UNDER CONCENTRATED LOADS Mona M. Abdelmagid 1 , Mohamed Abdel-Rahman. M. Khalil 1 , Ata El-kareim Shoeib 2 , Amal Hassanin 3 Post Graduate Student and Teaching Assistant Egyptian Russian University 1 Post Graduate Student, 2 Associate Professor, 3 Assistant Professor Faculty of Engineering, Helwan University, Egypt. خص البحث ملطات المصمتة هى بطاتستخدام. الب فى ا شيوعانشائيةنظمة ا واحدة من اكثر ا المصمتةطاتعتبر الب تلمحيطة بها. الى الكمرات احمال تنقل ا سمك ثابتنية ذات خرسانه قد نحتاج هى اا ماتوجهناة التى دائممشكل الطات و ذلكذه البحات فى هضافة فتن الى احيا فى كثير من الكهربائيةت التوصيحات للكهربائية و فتلم اعد او السلمصاداخلية او الم ال السشياء مثلب العديد من ا لتركي كان اذاوصالحالة و خصذه ا. فى هلتكييفاسير او ل ا لمو اوة مسبوبت امصبطا يتم فى الب التركيب يمكننا قاأكد من مقوماتها الت يمكننا ذلك وكت الجديدةلفتحاجود اال مع وحمى تحمل اطات عل التأكد من قدرة البلترخيم. للخارجيةل احماى تحمل اخرسانية علت الطاة قدرة البريقتان فقط لزيادف انه توجد طن المعرو م) طةدة سمك الب زيا- اضضافىد تسليح ا افة حدي الفتحة حول( عمليةرات الختبا فى هذا البحث نستعرض اث لثطات ب ؛ستخداملنظرية و ذلك بائج النتالية مع ائج المعملنتارنة ات مقا تمط الكسر و الت نظرية خطو ح الخطىيل ل برنامجستخدامذلك با و كANSYS . ABSTRACT: Slabs are one of the most important components in any building. They are structural elements which are designed intrinsically by techniques based upon the elastic theory. A method for slab analysis is presented as a practical substitute to full, non- linear, finite element methods that require expert knowledge and long running times. The method provides a general, safe and efficient way to analyze reinforced concrete slabs up to failure. Yield line analysis is an equivalent for two dimensional flexural members (plate or slab) of limit analysis of a one dimensional member (continuous beam). In this research, yield line analysis was used to calculate the maximum loads for two way solid slabs with openings. Also, linear finite element program (SAP2000) and nonlinear finite element program (ANSYS) were used to analyze tested specimens. The effect of the area of steel on the maximum load was analyzed using ANSYS. In the experimental Program, two way solid slabs with dimensions (1650mm×1650mm×80mm) were surrounded by beams of dimensions (100mm×250mm). Central openings of dimensions (300mm×300mm) were contained and introduced to different specimens. The slabs were loaded using a four point load system. Results showed that the concentrated load caused variation in crack patterns. The yield line theory gave maximum loads compared to the experimental. For ANSYS, minimum steel reinforcement proved to be essential for the ductility of the reinforced concrete slab. Keywords: yield line analysis, non linear finite element analysis, two way solid slabs, openings. Al-Azhar University Civil Engineering Research Magazine (CERM) Vol. (39) No. (3) july, 2017
USING NONLINEAR FINITE ELEMENT AND YIELD LINE THEORY IN SOLVING TWO WAY SOLID SLABS UNDER CONCENTRATED LOADS
Jun 26, 2023
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