Muthanna Journal of Engineering and Technology
MJET

Volume 5 issue 1, 2016

Asst. Prof.Dr. Basim Hasan Al-Majedi^a

Asst. Prof.Dr. Ahmed Hashim H. El-Eqapy^b

^a&b( Arch. Eng. Dept. / University of Technology)

الخلاصة

ركزت الاطروحات المعاصرة على دراسة الاطار العام لعمليه التصميم المعماري من خلال فهم العناصر المهمة الداخلة في مسار تلك العملية وانتهت للتركيز على مفهوم الابداع كمفهوم جامع وشامل يوضح الاسس العامة للابتكار في العملية التصميمية في العمارة، ومن هنا برزت الحاجه الى ضرورة دراسة اثر بقيه .المفاهيم المتاخمة له في تقويه واسناد المسار الابداعي بشكل عام ودورها التفصيلي في التأثير على مراحله المختلفة بشكل خاص

ويهدف هذا البحث الى تعريف الاسس العامة لمفهوم الابداع واهميته النظرية في العمارة مع دراسة وتصنيف مراحله المختلفة اضافه لعرض المفردات والمفاهيم المهمة المتاخمة له والمؤثرة في مساره التصميمي والانتاجي لتعرف مشكله البحث بعدم وضوح تأثير (التحقق) المفاهيم المساعدة (المتاخمة) في المسار التصميمي الابداعي في العمارة ويكون هدفه بتوضيح ما سبق وصولا لتشكيل اطار نظري ذو مؤشرات معرفيه واضحه مما سبق وتطبيقه على نتاج معماري متخصص بغيه استكشاف تحقق اثر تلك المؤشرات في تحقيق هدف البحث ومن ثم التوجه لطرح الاستنتاجات النهائية والتوصيات.

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Muthanna Journal of Engineering and Technology
MJET
Volume 1 issue 1, 2015

THE EFFECT OF ENTRANCE REGION GEOMETRY ON SOLAR CHIMNEY POWER PLANT PERFORMANCE

Arkan Kh. Al-Taie a, Ali Hayder Mutibb

a Machines and Equipment Engineering Department, University of Technology/Baghdad.

b Machines and Equipment Engineering Department, University of Technology/Baghdad.

Abstract

A numerical simulation to investigate the performance of solar chimney power plant is presented. A small scale model of solar chimney power plant was modelled by using FLUENT software. The solar chimney power plants consist of three essential elements, glass roof collector, chimney (tower) and wind turbine. The output power of the system depends on the input velocity to wind turbine. The turbine inlet velocity is a function of collector – chimney junction type. To solve the governing equations of conservation of mass, momentum, energy, Do- intensity, k and equations the finite volume method was adopted by FLUENT software to model and analyze such system. The results showed that the geometry of entrance region (collector-chimney junction type) has an effect on the performance parameters especially air flow velocity. Using curved or rounded junction with deflector will improve system mass flow rate by 37.65% as compared with straight junction.

Keywords: Solar chimney, Numerical simulation, Junction type, Performance parameters.

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Muthanna Journal of Engineering and Technology
MJET
Volume 1 issue 1, 2015

Abstract

The radioactive properties of building materials used for the construction of habitable structures in Iraq were investigated in this study. In the framework of this paper, ten samples of commonly used building materials (bricks and rocks used for incasing) were collected from ten Iraqi provinces for radiometric analysis. The activity concentrations of natural radionuclides in the selected samples were determined by gamma ray spectrometry using sodium iodide (NaI) detector. Based on the results of this study, the use of rocks for incasing manufactured in Al-Rumadi is considered to be unsafe for human habitation from radiological points of view due to relatively high background radioactivity. The radioactivity levels for building materials for the remaining investigated areas were well within the permissible limits.

Keywords: Natural Radioactivity Levels, Radiation Hazards, Building Materials

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Muthanna Journal for Engineering and Technology
MJET

Volume 4 issue 1, 2016

م.م. عمار رزاق حسن

قسم هندسة المواد/كلية الهندسة/جامعة الكوفة

الخلاصة

في هذا البحث تم إجراء عملية الطلاء الحراري بإتباع تقنية الرش باللهب من خلال استعمال خليط غازي مكون من الأوكسجين والإستيلين لغرض الحصول على طبقة سطحية من طلاء النيكل- المنيوم(metco450) على سطح الفولاذ المتوسط الكربون نوع (AISI 1050). توفر زيادة في الخواص الميكانيكية السطحية للمعدن المستعمل وتعويض الأجزاء المفقودة من السطح نتيجة عملية البلى. نفذ البحث بثلاث مراحل متلاحقة, تضمنت المرحلة الأولى تحضير النماذج وتهيئة السطح الأساس لهذه النماذج وكذلك تحضير مسحوق الطلاء وتحليل المكونات الكيمياوية للنماذج ومسحوق الطلاء. بينما تضمنت المرحلة الثانية تنفيذ عملية الطلاء(نيكل- ألمنيوم) باستخدام جهاز الرش باللهب وقد أجريت عملية الطلاء بطرائق مختلفة لكل نموذج من خلال التغير في الحجم الحبيبي لمسحوق الطلاء. أما المرحلة الثالثة من البحث فقد تضمنت إجراء الاختبارات القياسية المتمثلة باختبارات فحص الالتصاقية, فحص الخشونة, فحص البلى وفحص الصلادة لطبقة الطلاء علاوة على إجراء الفحص المجهري لطبقة الطلاء والسطح الأساس. حيث أوضحت النتائج إن زيادة الحجم الحبيبي من (25µm) إلى (75µm) أدت إلى زيادة معدل البلى وانخفاض في التصاقية طبقة الطلاء, كما لوحظ زيادة خشونة طبقة الطلاء بزداد الحجم الحبيبي لمسحوق الطلاء, كما ادى زيادة الحجم الحبيبي لمسحوق الطلاء الى انخفاض في صلادة طبقة الطلاء.

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Muthanna Journal for Engineering and Technology
MJET

Volume 4 issue 1, 2016

Hussein Yousif Aziz

PhD 1, College of Engineering, Al Muthanna University

Sammawa, 00964, Iraq

ABSTRACT

The problem of this study is that the building of foundation by stones at the present time leads to develop cracks in the superstructure. Therefore, the solutions and the right manner were suggested for building the stone in the small and big structures. This paper studies using and properties of stones in building of foundations, that the stone is rigid and stiff in the same time very cheap for building, especially in the regions wealthy with stone. The models were taken for analyzing, firstly experimentally in the field site and secondly by Plaxis Program using the Finite Elements with the same properties of the soil and calculate the vertical displacement, vertical strain, factor of safety and bearing capacity. It can be concluded that the using of the reinforced columns in the small foundation in addition to the beam and stones will reduce the vertical displacement and strain to lower values, maintain high value of bearing capacity and increase the factor of safety that makes the structure becomes safer. Also for the big structures like bridges another models were used with higher loadings and the same above parameters were calculated, the stone with special requirements approved to improve and treat the soil parameters even for the big structures.

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Muthanna Journal of Engineering and Technology
MJET
Volume 5 issue 1, 2016

Ameera Mohamad Awad

Department of Civil Engineering , College of Engineering , University of Al- Muthanna ,  Iraq

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Muthanna Journal of Engineering and Technology
MJET
Volume 5 issue 1, 2016

م.م سؤدد عبد الغني شياع

كلية الهندسة /جامعة المثني/قسم هندسة العمارة

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Muthanna Journal of Engineering and Technology
MJET
Volume 1 issue 1, 2015

Nabaa Shakir Hadi

College of Engineering, University of Babylon, Babylon, Iraq

Abstract

The main objective of the present study is to investigate the residential solid wastes characteristics and energy content in Hilla city in the middle of Iraq. The solid waste characteristics, and energy content of Hilla city were found by selecting one area, which represent different lifestyles. Data of samples were collected from 13 multi-storey buildings in the Tuhmaziya region in Hilla city through 2013. The refuse was classified into ten categories (food wastes, paper, plastics , glass, textiles, rubber, tin cans , wood, cardboard, and garden trimmings, etc). The food category was found to be 46.31% of the total weight, and moisture content of 37.52 %. The chemical formula of a residential solid waste of Hilla city was found to be C802.3 H2630.3 O1074.3 N18 with sulfur and without sulfur as C44.6 H146.1 O59.7 N. The energy content (dry basis) was found to be 12369kJ/kg.

Keywords: Energy content, Residential solid wastes, Chemical formula, Hilla city

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Muthanna Journal of Engineering and Technology
MJET
Volume 1 issue 1, 2015

Riadh A. Abassa, Mustafa Sh. Zewairb
a Dept. of Civil Engineering, College of Engineering, University of Muthanna.
b Dept. of Civil Engineering, College of Engineering, University of Basrah.

Abstract

This research is devoted to investigate the effect of CFRP strips on the behavior and load carrying capacity of strengthened I-section reinforced concrete deep beams. The experimental program variables include configurations of CFRP, spacing between CFRP and type of loading (monotonic or cyclic load) on the behavior of strengthened deep beams. The experimental test results confirm that the strengthening technique of CFRP system is applicable and can increase the shear capacity for strengthened of RC beams. In this study, the ultimate load capacity of the strengthened beams ranged between 18% to 38% under monotonic load and between 11% to 26% under cyclic load over the ultimate load capacity of the reference beam. For beams including CFRP changing the spacing of the strips from 50mm to 20mm, increased the strength of the beam by 17%. For beams subjected to cyclic load the mode failure is nearly the same as that of beams subjected to monotonic load and the cyclic loading produced somewhat less brittle behavior in beam under cyclic loading.

Keywords: CFRP, Cyclic load, I-section, Strengthened.

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