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Analysis of reinforced concrete beams with large opening
مقدم أطروحة جامعية
الجامعة
الجامعة التكنولوجية
الكلية
-
القسم الأكاديمي
قسم هندسة البناء و الإنشاءات
دولة الجامعة
العراق
الدرجة العلمية
ماجستير
تاريخ الدرجة العلمية
2004
الملخص الإنجليزي
This study is devoted to investigate the behavior of reinforced concrete beams with large openings subjected to pure torsion, using a non-linear three- dimensional finite clement model.
The 20-node isoparametric brick elements have been used to model the concrete The reinforcing bars are idealized as axial member, embedded within the concrete element and perfect bond between the concrete and the reinforcement has been assumed to occur.
The behavior of concrete in compression is simulated by an elasto-plastic work hardening model followed by a perfectly plastic response, which is terminated at the onset of crushing.
In tension, , smeared crack model with fixed orthogonal cracks has been used with the inclusion of models for the retained post-cracking tensile stress and the reduced shear modulus. The non-linear equations of equilibrium have been solved using an incrementa-iterative technique operating under load control The solution algorithm used was the modified Newton-Raphson method.
The numerical migration has been conducted using the 27 point Gaussian type rule. Different type of reinforced concrete beams with large rectangular transverse openings have been analysed and the finite element solution were compared with the experimental data Several parametnc studies have been carried out to investigate the effect of some important finite element and material parameters The effect of mesh refinement, concrete compressive strength, amount of transverse reinforcement, warping restraint and opening size on the torque-twist response have been investigated.
In general good agreement between the finite element solutions and the experimental results has been obtained.
The finite element solutions revealed that the collapse torque and post-cracking tensional stiffness decrease with the increase of length or depth of opening. for the beam tested in this study, the result show that the ultimate torque capacity increases by about 21% when the length of opening decreases form 800mm to 400mm, and it decreases by 16% when the length of opening increases from 800mm to 1600mm Also , as the depth of the opening decrease, form 200mm to 180mm, the torsional capacity increases by about 15%, and it decreases by 16 % when the depth of opening increases from 200mm to 240mm
التخصصات الرئيسية
الموضوعات
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Muhammad, Thair Jasim. (2004). Analysis of reinforced concrete beams with large opening. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-305926
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Muhammad, Thair Jasim. Analysis of reinforced concrete beams with large opening. (Master's theses Theses and Dissertations Master). University of Technology. (2004).
https://search.emarefa.net/detail/BIM-305926
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Muhammad, Thair Jasim. (2004). Analysis of reinforced concrete beams with large opening. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-305926
لغة النص
الإنجليزية
نوع البيانات
رسائل جامعية
رقم السجل
BIM-305926
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
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