eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2016-10-01
39
4
243
249
10.21608/erjm.2016.66392
66392
Original Article
PARTICLE SWARM-AIDED DESIGN OF A FUZZY LOGIC-BASED CONTROLLER FOR SUPERCONUCTING GENERATOR
Ragaey A. F. Saleh
1
Electrical Engineering Department, Faculty of Engineering, Menoufiya University
An approach is suggested in this paper for the design of a fuzzy logic-based governor controller as a possible mean to improve superconducting generator (SCG) stability under transient conditions while it is connected to a very large power system (an infinite-bus). In this approach, the stabilizing signal is based on the instantaneous speed deviation and acceleration of the superconducting generator and on a set of simple control rules. Meanwhile, a tuning parameter is introduced to generate the appropriate control rules, and thus increase the effectiveness of the fuzzy logic-based controller. Particle swarm optimization (PSO) technique is used to search for optimal settings of the fuzzy controller parameters. Simulation results, compared with those using a conventional controller, show that the proposed, PSOtuned fuzzy controller leads to a significant improvement in the SCG system performance over a range of operating conditions.
https://erjm.journals.ekb.eg/article_66392_0ff15df1196251fe55e2adceb1aae5a7.pdf
Superconducting generator
Fuzzy logic control
Transient stability
Particle Swarm Optimization
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2016-10-01
39
4
251
261
10.21608/erjm.2016.66393
66393
Original Article
RETOFITTING OF REINFORCED CONCRET BWAMS USING CFRP FLEXURAL AND SHEAR
Tariq M. Nahhas
1
Associate professor of civil engineering Umm AlQura University College of Engineering and Islamic Architecture Makkah, Saudi Arabia
In this paper, thirty three tests were conducted on 200x400x3250 mm full-scale reinforced concrete beams retrofitted in flexural and shear using Carbon Fiber-Reinforced Polymer (CFRP) laminates. All beams were tested under four-point bending. The main variables considered were the position and the length of retrofitting of CFRP laminates, six different lengths 500,1000,1500,2000, 2500, and 3000mm were used to retrofit the beams in flexural, while three different position of CFRP, diagonal, vertical and full CFRP strips were applied on the lateral faces of the beams to retrofit the beams in shear. The experimental results, indicated that generally, CFRP laminates help in improving the structure performance by reducing deflections and/or cracking and increasing ultimate strength. The beams retrofitted in shear and flexure by using CFRP laminates are restored to stiffness and strength values nearly equal to or greater than those of the control beams. It was found that the efficiency of the strengthening technique by CFRP in flexure varied depending on the length of CFRP laminates. Also the experimental outcomes prove that CFRP strips distribution can improve the load carrying capacity of the beams retrofitted in shear. The failure modes are controlled by the pre-repair damage flexural crack wherein it causes the CFRP deboning.
https://erjm.journals.ekb.eg/article_66393_a91ac29734c69d892df7128a4f56982f.pdf
Beams
Carbon Fiber Reinforced Polymer (CFRP)
Retrofitting
Laminate
Reinforced Concrete beam
flexure
shear
Deflections
Ultimate strength
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2016-10-01
39
4
263
275
10.21608/erjm.2016.66394
66394
Original Article
SEISMIC FRAGILITY CURVES FOR LOW AND MEDIUM R.C FRAMED STRUCTURES IN EGYPT
K Kandil
1
G. Hekal
2
A. Dawod
3
Professor of Steel Structures and Bridges Design, Menoufia University, Egypt
Lecturer at Civil Engineering Department, Menoufia University, Egypt
M.Sc. Student, Menoufia University, Egypt
The current research aims at developing seismic fragility curves for reinforced concrete framed structures in Egypt. For that purpose, four and eight-story R.C. frames were designed according to Egyptian Code of Practice. The frames were located in three seismic zones, i.e. Alexandria, Safaga and Taba. Incremental dynamic analysis was performed under ten ground motions to determine the yielding and collapse capacity of each building. Five performance levels, namely, operational (OP), immediate occupancy (IO), damage control (DC), life safety (LS) and collapse prevention (CP) were considered and monitored in the analysis. Fragility curves were developed for the structural models of the studied frames considering the five selected performance levels.
https://erjm.journals.ekb.eg/article_66394_03db1348421b5a8c934af16ff03dc78d.pdf
Fragility curves
Incremental dynamic analysis
Performance-based design
Lateral load resisting systems
Seismic risk analysis
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2016-10-01
39
4
277
283
10.21608/erjm.2016.66395
66395
Original Article
COMPARATIVE STUDY ON STATIC AND DYNAMIC ANALYSIS OF STRUCTURES
N Meleka
1
G. Hekal
2
Ashraf Rizk
3
Civil Engineering Department, Faculty of Engieering, Menoufiya University, EGYPT
Civil Engineering Department, Faculty of Engieering, Menoufiya University, EGYPT
Civil Engineering Department, Faculty of Engieering, Menoufiya University, EGYPT
As the modern buildings have been gotten taller and narrower than before, the structural engineers have to perform both static and dynamic analysis for seismic loads that may affect on structures in order to make sure of the safety verifications and the optimal design requirements. The two common methods that always used for structural analysis against lateral loads are equivalent static method and response spectrum analysis. However, some different limits and restrictions for using the first method are stated by the universal design codes. This research studies the differences between the two methods through the results of seismic analysis by using Egyptian code of practice 2012, European Code 8: 2004 and Uniform Building Code 1997. It has been concluded that the equivalent static analysis method always gives higher results for drifts and overturning moments than those of response spectrum analysis method in case of using the aforementioned three design codes
https://erjm.journals.ekb.eg/article_66395_519e40b715e2db7ef633797cde5338b9.pdf
Seismic analysis
response spectrum method
equivalent static method
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2016-10-01
39
4
285
300
10.21608/erjm.2016.66396
66396
Original Article
DUCTILITY OF STRENGTHENED R.C BEAMS WITH LAP SPLICES
G. I. khaleel
1
A. S. Debaiky
2
M. H. Mansour
3
Marwa I. Badawi
4
Prof. of Reinforced Concrete, Civil Engineering Department, Faculty of Engineering, Benha University, Cairo, Egyp.
Associate Prof, Civil Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt.
Lecturer, Civil Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt.
Demonstrators, Civil Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt.
Studying the ductility of strengthened reinforced concrete beams with varying lap splices is very important for the development of the structural behavior of RC beams. When reinforcement is spliced together within a concrete beam, it is necessary to overlap the bars long enough to transfer the tensile stresses between spliced bars without inducing a pullout failure in the concrete. Most design codes allow the use of bars with lap splice and specify minimum length of the lap as well as the required transverse reinforcement. The objective of this research is to study the behavior of reinforced concrete simply-supported beams with lap splice at tension reinforcement. The tension reinforcement of these beams will be spliced at different locations, with different numbers of lap spliced bars and by using different percentages of reinforcement. Transversal FRP strips will be used to strengthen the RC beams with different lap splice types in order to improve their ductilities. Each of glass and carbon fiber will be used to fabricate the FRP strips. This study concludes that FRP wrapping provided greater ease of application, make beams more ductility.
https://erjm.journals.ekb.eg/article_66396_4582c53d6f8ccb1d5c8fc6e4b0d78d42.pdf
Ductility
FRP
lap splices
tensile stresses
transverse reinforcement
tension reinforcement
strengthen
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2016-10-01
39
4
301
319
10.21608/erjm.2016.66397
66397
Original Article
تقييم البيئة المعمارية التعميمية لدمج الطالب ذوى اإلعاقة
صفاء محمود عيسي
1
حسام ادين مصطفي
2
عبير عطيه مهنا
3
کلية الهندسة - جامعة المنوفية
کلية الهندسة - جامعة المنوفية
Disability is a part of the human nature, where everyone suffers from some form of disability at some point in his life stage, it may be temporary or permanent. The research problem could be summarized in how the architectural rehabilitation is not efficient for the integration of students with disabilities in the Egyptian Governmental schools, Thus, a study of the current situation of the architectural rehabilitation of some local schools is required, which can be occurred by comparing local models to some Arab and international examples. The importance of the Research represented as it is the first step for the person with disability in dealing with the community. The Reseach aims at defining the Importance of the Integration of Students with disabilities in the School Environment, and assesses the design processes achieved in the schools with the integration programs. The Research follows the Qualitative approach, which depends on the method of a case study, through a comparative analysis of two local examples with International and Arabic ones. The research consists of three parts,the first part discusses the theoretical framework of the concepts of disability and integration, while the second part deals with the case study of international, Arabic and local examples, and concludes with findings and recommendations. The research results indicate that the average level of architectural rehabilitation of the local models is weak. The inefficiency of such schools is represented in the lack of basic criteria which should have been considered for students with disabilities. Such inconsideration results in their movement disability and prevents them from using spaces independently. The research recommends the allocation of at least one school, at each level of educational administration to serve as an educational, therapeutic, and rehabilitative institution - given the current economic challenges faced by Egypt - as well as providing all detailed drawings that concern design with accessibility for individuals with disabilities, to be available for architects at the Public Organization for Educational Buildings, in order to ensure proper implementation
https://erjm.journals.ekb.eg/article_66397_f7b12a4a71f7b1d1ccd72bba5b13c1a3.pdf
تأهيؿ البيئة
الدمج
الطالب ذکم اإلعاقة
البيئة المدرسية
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2016-10-01
39
4
321
330
10.21608/erjm.2016.66398
66398
Original Article
التراث اللامادي مدخال للحفاظ العمرانًي وتنمٌة المجتمع المحلًي دراسة لمولد السٌيد البدوي بمدٌينة طنطا
علاء علوي الحبشي
1
علياء خليل السيد زيدان
2
کلية الهندسة - جامعة المنوفية
کلية الهندسة - جامعة المنوفية
تتسم ثمافة الشعوب باحترام العادات والتمالٌد، وتعد ظاهرة االحتفال بموالد األولٌاء من تلن العادات الضاربة فً جذور المجتمع المصري حٌث تمام سنوٌا، والموالد فعالٌة دٌنٌة لها تراث ثمافً ٌلزم أخذه فى االعتبار کجزء ال ٌتجزأ للحفاظ على الموالع التراثٌة واألثرٌة المرتبطة بها، فالحدث ال ٌکون دٌنٌا فمط بل له شک سٌاحً والتصادي ومجتمعً وتراثً، لتمتزج الثمافة الشعبٌة بشمٌها المادي وغٌر المادي بعناصر فً النسٌج العمرانً المحٌط مثل: عمارة الخدمات والسرادلات، وتخطٌط عمران المولد، والذکر الصوفً، واألنشطة االلتصادٌة، واأللعاب الشعبٌة وغٌرها فٌتکامل الشک المادي بنظٌره الالمادي فً منظومة تتوارثها األجٌال. والبحث ٌلمً الضوء على مولد السٌد البدوي بمدٌنة طنطا فً دلتا مصر وهو أکبر موالد مصر من حٌث المساحة وعدد المرٌدٌن، فنجد تؤثٌره الواضح على النمط العمرانً للمدٌنة )من مناطک سکنٌة – فراغات عامة – خدمات مرتبطة بالمولد( ،وعلى النمو السرٌع والمضطرد للمدٌنة عمرانٌا واجتماعٌا والتصادٌا وکذلن سٌاحٌا لٌصبح تفعٌل منظومة الحفاظ على عناصر التراث المادي فً خضم هذه التنمٌة السرٌعة تحدٌا صعبا ، بالرغم من أن هذه العناصر تمثل الدلٌل الماطع على تارٌخٌة الفعالٌة، وهنا تنصب مشکلة البحث فً طرح أطر تشغٌلٌة ٌکون فٌها مدى الحفاظ العمرانً واألثري للعناصر المادٌة متزنا مع الضوابط األمنٌة للتحکم والسٌطرة على فعالٌات الحدث. إن المبالغة فً تفعٌل منظومة حفاظ عمرانً تإصل الروح التراثٌة بالمکان وتضع ضوابط تمٌٌد مرٌدي المولد فً تفاعلهم مع عناصر التراث له تؤثٌرا سلبٌا على استمرارٌة الظاهرة وٌشوه التمالٌد المرتبطة بالحدث، إال أن إعطاء کامل الحرٌة للنمو المضطرد السرٌع للمولد على حساب تشوٌه النسٌج العمرانً التارٌخً إلفساح مساحات للحشود فً الفراغات العامة أو بالمبانً التارٌخٌة المرتبطة بالحدث وتوسعتهما بغرض استٌعاب أکبر لدر من المرٌدٌن، هً تنمٌة غٌر متوافمة مع أسس الحفاظ العمرانً األمر الذي سٌفمد موالع التراث لٌمتها وتکاملها بعضها البعض، وسٌشوه هوٌة العمران تدرجٌا، وسٌإثر على المدى البعٌد على األهمٌة التارٌخٌة للفعالٌة، ولد ٌإدى ذلن أٌضا إلً تغٌٌرات ثمافٌة، بل وإمکانٌة اندثار الحدث. وبتحدد الهدف من البحث فى تحمٌک عاللة االتزان بٌن الحفاظ على التراث الثمالى المادى وغٌر المادى فى منظومة الحفاظ على الموالع التراثٌة، والحفاظ على الهوٌة الثمافٌة واستغالل التراث غٌر المادى کموة دافعة للتنمٌة االلتصادٌة واالجتماعٌة للسکان المحلٌٌن، والبحث ٌعتمد على الطرٌمة النوعٌة Research Qualitative ،فالدراسة تضم زٌارات مٌدانٌة للمحٌط العمرانى للمولد وکذلن لماءات مع ممٌمٌه ورواده وسکان المنطمة، وکذلن دراسة معمارٌة وتارٌخٌة للوحدات السکنٌة والمبانً المحٌطة التً تنتمً للحدث، وذلن لتمٌٌم تکامل العناصر المادٌة مع الشک غٌر المادي من أنشطة وعادات وتمالٌد، وتخلص الدراسة إلى تحدٌد المٌم والسمات المعبرة للظاهرة التراثٌة إلدراجها ضمن مخطط حفاظ للمعبرات المادٌة وغٌر المادٌة وال تخص واحدا دون اآلخر، وتطرح أسسا لمنظومة توظٌف متزنة مع آلٌات الحفاظ العمرانً ومع التنمٌة السٌاحٌة إلفادة المجتمع المحلً.
https://erjm.journals.ekb.eg/article_66398_8a6d71fdcb1982376f9bf5caad6486a7.pdf
التراث غٌر المادي– الموالد- الحفاظ العمرانً