2024-03-28T10:44:11Z
https://erjm.journals.ekb.eg/?_action=export&rf=summon&issue=10043
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
Superconducting Magnetic Energy Storage (SMES) Stabilizer Based Model Predictive Control Technique
M.
Roshdy
Ashraf M.
Hemeida
Abd-Allah A.
Ibrahim
Gaber
Elsaady
This paper presents a design of Model predictive control (MPC) based superconducting magnetic Energy Storage (SMES) unit. Model predictive control (MPC) technique has the ability to consider the overall system constraints. The MPC technique is applied successfully for improving the overall power systems performance. The paper presents the application of MPC technique based SMES device for enhancing power system stabilization. A single-machine infinite bus power system model is used to examine the feasibility of applying MPC technique based SMES device for improving the power systems performance and damping power systems oscillations. The obtained results show that the proposed controller maintain the robust performance, minimize the effect of disturbances and specified uncertainties, very effectively.
Single-machine infinite bus (SMIB)
Superconducting Magnetic Energy Storage (SMES)
Model predictive control (MPC)
Proportional-Integral-Derivative Controller (PID)
2017
10
01
301
307
https://erjm.journals.ekb.eg/article_66356_90f0cdfa7c58f32937c8d188d4cdf9f4.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
Experimental Investigation of Heat and Mass Transfer in Evaporative Heat Exchangers at Variable Operating Conditions
Mostafa A.
Abdel-Baky
Amr IbrahemM.
Eid
Hany. A.
Shalata
The evaporative heat exchanger has numerous applications in transferring heat. In this research an experimental study of the heat and mass transfer has been conducted on an experimental evaporative heat exchanger. The study involves the effect of cold water mass flow rate, hot water inlet temperature, air flow rate, injection holes diameter and horizontal distance between injection holes on the heat transfer, overall heat transfer coefficient, effectiveness and mass transfer. The results obtained indicate an increase of heat and mass transfer with the increase of hot water flow rate, hot water inlet temperature, air flow rate and injection holes diameter.
heat transfer
Evaporative heat exchanger
Evaporative condenser
2017
10
01
309
323
https://erjm.journals.ekb.eg/article_66357_7d921662718f66826faaca3172f8d804.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
BEHAVIOR OF PRECAST PRESTRESSED HOLLOW CORE SLABS WITH OPENINGS: EXPERIMENTAL STUDY
A. F. EL-
khouly
N. N.
Meleka
M. A.
Tayel
K.M.
Heiza
A hollow core slab is a precast prestressed concrete member with longitudinal hollow cores that reduce its self-weight. This paper presents the effects of openings on flexural and shear behavior of precast prestressed hollow core slabs. Three full-scale hollow core slabs of dimensions 4100x1200x160 mm were tested. One slab without opening is considered as a control specimen. The second slab with a central opening with dimensions 250x250 mm at mid of span was tested to investigate the effect of this opening on the flexure capacity. The third slab has an opening at mid of one-third of span was tested to investigate the effect of the opening on shear capacity of hollow core slab. All specimens were tested under four loading points until failure. Test results showed that the opening at mid-span decreases the flexure capacity of the slab. The failure load of the slab in this case is decreased by about 11.40%. The failure modes of the hollow core slab with a central opening as well as the control slab were ductile. The presence of the opening at maximum shear affect the slab behavior badly. It caused a sudden failure. The reduction of the failure load was about 21%
2017
10
01
325
329
https://erjm.journals.ekb.eg/article_66358_ecf222080c92b7393d772178691a8b45.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
EFFECTS OF DIFFERENT TYPES OF CONCRETE TOPPINGS ON THE BEHAVIOR OF PPHC SLABS
A.
Nabil
N.
Meleka
Kh.
Heiza
Usage of precast prestressed concrete hollow core (PPHC) slabs has been extensively spread out in roofing and flooring systems around the globe due to benefits of mass production and fast site construction. In this flooring system, prestressed precast hollow core slabs are used together with or without a cast in place concrete topping. A few research works focused on studying the effect of using concrete topping on enhancement of the structural integrity of the PPHC system. This paper presents an experimental study conducted to investigate the effects of using different types of cast in place (CIP) concrete toppings on the behavior of PPHC slabs. Ten typical full scale specimens of PPHC slabs were prepared in precast concrete plant under quality control program; specimens were classified into five groups. Group (1) includes two control specimens without topping, Group (2) contains two specimens with ordinary reinforced concrete topping, Group (3) involves two specimens with ordinary reinforced concrete topping connected to the top surface of the slab using steel anchors, Group (4) comprises two specimens with fibrous concrete topping, and finally Group (5) includes two specimens with ferrocement topping. All test specimens were tested under static line loading until failure. Cracking patterns, failure modes, cracking and ultimate failure moment capacities, and moment- deflection relationship have been illustrated, discussed, and analyzed in this study. Adding concrete topping to the PPHC slabs enhances flexural behavior directly under static line loading, as the cracking moment resistance was increased by about 6% to 31% and failure moment was increased by about 11% to 41% by using concrete toppings
Hollow core slabs
Precast concrete
Prestressed concrete
Fibrous concrete
ferrocement
Concrete toppings
Steel anchors
2017
10
01
331
339
https://erjm.journals.ekb.eg/article_66359_d2dc671a04a2d2f372d648dad52c3f82.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
EXPERIMENTAL BEHAVIOR OF PRECAST PRESTRESSED HOLLOW CORE SLABS STRENGTHENED WITH DIFFERENT TECHNIQUES
M. A.
Kandil
N. N.
Meleka
M. A.
Tayel
Precast prestressed hollow-core reinforced concrete slabs are used extensively for floor and roofing systems in precast concrete construction. This paper investigates reinforced concrete precast prestressed hollow core slabs strengthened with different systems. An experimental test program prepared to test some models of precast prestressed reinforced concrete hollow core slabs before and after strengthening. Nine full-scale hollow core slabs having the dimensions 4100x1200x160 mm were tested. Specimens were classified in three groups. The first group contains two control specimens tested without any strengthening. Second group contains three specimens strengthened by using GFRP strips. Third group contains four specimens strengthened by using steel plates. All slabs were tested under two central the line loads at middle third of span until failure. Test results showed that all of the strengthening techniques are very effective in increasing the element’s structural carrying capacity
strengthening
Precast, Prestressed
Hollow core slab
Steel plates
GFRP
2017
10
01
341
347
https://erjm.journals.ekb.eg/article_66360_782170e792b98d7d8b63127cc68d603b.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
Monorail System as Urban Sustainable Transit in Alexandria
Amr M
El Adawy
Alexandria city is the second largest and second most populated city in Egypt. It suffers from high levels of congestion and air pollution. In order to reverse this decline in the quality of life in cities, attempts should be encouraging people to reduce the usage of private cars and impress the usage of different public transportation. Taking in consideration that existing public transportation mode choices are unsustainable and undeveloped mode. Hence, the Governments must seek for sustainable modes of public transport, which make use of the road space more efficiently than private transport. The aim of the paper is to provide a study of Urban Monorail System (UMS) as a successful tool that is used all over the world to improve the urban development, activities and the overall urban environment. The paper method is Qualitative. Finally, the researcher sets out a Transport Questionnaire directed to the users of the recent transit mode under study concluding with recommendations that reflect their needs and points of view which can be implemented in the current policies governing Alexandria for the future.
Sustainable Public Transport System
Monorail Transit
Heavy Rail Transit
Transport Questionnaire
2017
10
01
349
357
https://erjm.journals.ekb.eg/article_66361_4926502b19f8ad91c193588151d0d9da.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
Development of Urban Planning Process Using Associative Parametric Approach for Optimising Urban Morphology
Sherif M.
El Adawy
Regarding the complexity of parameters such as (block size, building heights, streets width, land uses, ... etc.) controlling the aspects of urban planning (UP), traditional tools don‟t give optimum solutions in reasonable time. These tools are considered static ones, as they depend on coordinate-based systems to link planning elements with each other. Urban planners are now in constant search for new approaches and methodologies to generate multiple parameters of UP projects to overcome timing problem. Among new methodologies is the parametric approach in planning, which offers flexibility to planning variations and explorations of conceptual planning ideas. When disciplines of various science fields merge, and develop, new approaches arise. This paper focuses on merging UP process with an associative parametric approach to address the limitations of existing systems. The associative parametric approach deduces several solutions for the urban planners through utilising computational techniques. This paper reviews the basic concepts of UP regarding its aspects and theories. It illustrates parametric design (PD), its definitions, and techniques. The paper shows how merging the associative parametric approach with the conceptual planning phase of the UP process will lead to the creation of Parameterized Conceptual Planning phase, which can facilitate using several parameters during the UP process. Some examples are also demonstrated to show how applying this new computational technique through its guidelines shown before, hence applied to a case study.
urban planning process, urban planning
associative parametric approach, parametric design, conceptual planning phase, parametrized conceptual planning phase
2017
10
01
359
366
https://erjm.journals.ekb.eg/article_66362_64847472d2d91fcd52584d8594445c7b.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
PARAMETRIC ARCHITECTURE TOOLS AS AN APPROACH TO OPTIMIZE DAYLIGHTING IN OFFICE BUILDINGS
Mohamed Osama
Hegazy
Salwa Mostafa
Shehata
Mohamed Adel
Shebl
Parametric architecture tools have been used to explore design variations and potential possibilities of architecture forms and patterns. It helps the architect to overcome the limitations of traditional tools of modelling. The computer is no longer used as a tool but rather a partner in the design process. The utilization of computers as design partners should aid architects efficiently simulating their design problems and reaching optimum goals at minimum time. As the world gives increased focus on energy efficiency and occupant comfort, there is now an emerging need to include sustainability–related performance aspects within design, most notably energy and daylighting. More recently, new methodologies have been developed to use daylight simulation as a driven tool for design, which showed the benefits of parametric driven façade to reach maximum daylight quality. This paper will discuss how to integrate parametric architecture into daylight simulation in order to reach the optimum daylight performance in the building. The research will explain the parametric architecture techniques and tools used in the optimization process. In addition, the research will track parametric driven façade examples and the parametric process used in the optimization process. Parametric modelling tools along with validated environmental analysis tools (Grasshopper and Diva for Rhino) will be used together to achieve the optimum sustainable design. The goal of the research is to link between parametric architecture as a tool in building aesthetics and daylight simulation.
Parametric Architecture
Simulation
Daylight
2017
10
01
367
374
https://erjm.journals.ekb.eg/article_66363_fc93bbb3263ec29b08bd2ef5ae249fb1.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
Toward Inclusive Design Applications in Recreational Spaces for People with Disabilities in Egypt
Menna Allah
Mounir
Asmaa Nasr
El-Dien
Lamis
El-Gezawy
A disproportionate number of persons with disabilities live in developing countries, often marginalized and in extreme poverty. They face discrimination and barriers that restrict them from participating in society. About 10 to 12% of the total populations in Egypt are suffering from different types of disabilities. They face restrictions that prevent them from normal life, and then they lose their motivation for challenging their disabilities. Besides that, there are problems about accessing entertainment spaces to keep their positive energy. Architects have their role to help people with disabilities to enjoy accessible recreational spaces although their disabilities. The aim of this research is to determine strategies for design entertainment spaces which is accessible, provide an integration in community with different abilities in a safe pleasing environment for all. This research will analyse examples of inclusion in recreational spaces in deferent countries, study universal design strategies that are common in these examples, then with making comparison between international strategies and the requirements which are included in the Egyptian Code, Conclusion can be achieved as a step toward accessible recreational spaces for people with disabilities.
PWDs (People with Disabilities)
Recreational spaces
Accessibility and The Egyptian code requirements for construct
2017
10
01
375
384
https://erjm.journals.ekb.eg/article_66364_cf91441b941b2293cedeaba6a507772f.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
الاستدامة فى عمارة تنسيق المواقع دراسة تطبيقية لنظام تقييم المواقع المستدامة (SITES V2)على الفراغات المفتوحة بجامعة کفر الشيخ
آيه حمدي سعيد
رجب
ياسر جلال الدين
عارف
محمد ابراهيم محمد
ابراهيم
محمد عادل
شبل
ملخص البحث: زاد الاهتمام خلال العقود الماضية بالقضايا البيئية وعواقبها الاقتصادية، وبدأت الدول المتقدمة فى وضع أساليب جديدة لتحقيق الاستدامة فى قطاعات البناء والتشييد، إلا أنه ما يزال هناک تهميش لدور تنسيق المواقع والفراغات المفتوحة وکيفية تصميمها من منظور الاستدامة، وذلک على الرغم من کونها بيئة مکملة للبيئة المبنية، وذات مساحات أکبر من المساحات البنائية. من ناحية أخرى، تتضح أهمية هذه الفراغات في کونها محور لتفاعل المستعملين مع البيئة الخارجية، بالإضافة إلى ما يقع عليها من عبء تحقيق التوازن الاجتماعي والبيئي، وما لها من دور فى تحقيق القيم البصرية والجمالية، إلى جانب خصائصها العمرانية والوظيفية. لذلک، يهدف هذا البحث إلى وضع مبادئ لتحقيق الاستدامة فى عمارة تنسيق المواقع، وذلک من خلال القاء الضوء على أول نظام معتمد بالولايات المتحدة الأمريکية لتقييم عمليات تصميم وانشاء وصيانة المواقع المستدامة SITES V2. وأيضاً، إجراء دراسة تحليلية لنماذج من مشروعات تم تقييمها واعتمادها بهذا النظام. وأخيراً، يتم تقييم الآداء البيئي لنموذج من الفراغات المفتوحة للجامعات فى مصر، کنموذج لتنسيق المواقع، وصولاً إلى أهم الاعتبارات التي يجب مراعاتها لتعزيز جهود الاستدامة فى عمارة تنسيق المواقع، ومن ثم وضع التصورات والمقترحات التي تساعد على التطور بهذا الإتجاه مستقبلاً.
الاستدامة – عمارة تنسيق المواقع – نظام التقييم SITES V2– مصر – الجامعات
2017
10
01
385
399
https://erjm.journals.ekb.eg/article_66365_458f8c4eb1da2350c1046a34a93efbcb.pdf
ERJ. Engineering Research Journal
1110-1180
1110-1180
2017
40
4
الدلالات الرمزية لتکنولوجيا أنظمة الإنشاء واثرها على جماليات التعبيرالمعماري
محمد زکريا
غريب
لقد أدى التطور التکنولوجي في أنظمة الإنشاء إلى أن أصبح الإنشاء أداة للتعبير المعماري بدلا من کونه عائقا وبالتالي تعاظم الدور الإنشائي في العملية الإبداعية والرمزية في العمارة من منطلق أن أنظمة الإنشاء لا تستخدم فقط وإنما تعرض أيضًا کوُنها تعبير مادي عن اطر ثقافية وتحوّلات تّقنيه تجسّد الواقع وتوحي بالمستقبل , فإن تلک الأنظمة لا تهدف إلى تحقيق مضامين وظيفية للمستخدم فقط وإّنما لابد لها من دلالات تعبيرية توفرالاستمتاع البصري والادراکي للمشاهد وتکون وسيله للتلاقي والتواصل معه , ويتحقق ذلک عند إکساب تلک النظم تأثيرات جمالية ومقاربات رمزية ُتقدم في لغة تصميمية تتضمن صياغات بنائية تعبّر عن القوة والرشاقة ومعالجات فراغيه تؤکد على التواصل , وعلاقات إنشائية ديناميکية تجمع بين الصرامة والحيوية , ومن هنا يهتم البحث بتلک التأثيرات والمقاربات کأحد الادوات للارتقاء بالبيئة المعمارية کونها عناصر مرنة تتيح له الانتقال من صياغة کتل جافة وجامدة إلى إبداع أشکال إنشائية تحمل قيم ومعاني وبصفتها وسائل متنوعة لجذب المتلقي والتأثير فيه وتلبية احتياجاته الفکرية والمعنوية , وبالتالي يوّلي البحث اهتمامًا بجماليات التعبير بالرمز في الصيّغ البنائية للأنظمة الانشائية ويدعوا إلى تعظيم التعاطي معها بصفتها نصوصًا لغوية تحمل رسائل في لهجات إنشائية متمايزة .
الدلالات الرمزية
تکنولوجيا أنظمة الإنشاء
التعبير المعماري
2017
10
01
401
416
https://erjm.journals.ekb.eg/article_66366_c42a86037fb213561302594014ebaac9.pdf