THE EFFECT OF CREATING SYMMETRICAL OPENINGS IN THE SLABS OF HIGH BUILDINGS ON THEIR STRUCTURAL BEHAVIOR
Mohamed
Mahmoud Ahmed
Civil Engineering, Faculty of Engineering, Assiut University
author
Aly
Gamal Abdel Al-Shafy
Civil Engineering, Faculty of Engineering, Assiut University
author
Alaa
Abd Rb Al-Nabi Mohamed
Civil Engineering, Faculty of Engineering, Assiut University
author
text
article
2017
eng
Sometimes, one is forced to create large openings in the slab of an existing multistory building for various purposes for examples to construct additional stairs, lighting purpose, elevator and other architectural features. This study examined the seismic performance of multistory building with created large openings in the slabs .The main parameters, taken into considerations are: area, position of openings and number of stories. The effect of these variables on top displacement, story drift and story shear force was considered through a numerical study. Finite element analysis using ETABS 2015 program to predict the structural behavior where statically lateral loads were applied using traditional code method. The analysis was performed according to Egyptian building code. The grade of concrete was C300 and reinforcement 36/52 in all cases. The analysis was performed and the obtained results were evaluated and discussed to evaluate the effect of openings in the slabs of multistory building under seismic loads. Finally, some important conclusions declaring the effect of the created were given.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
742
752
https://jesaun.journals.ekb.eg/article_116880_b1bc369b3b73f66148d8c652bdea0af7.pdf
dx.doi.org/10.21608/jesaun.2017.116880
EFFECT OF VARIOUS ALUMINUM WASTE GRADATIONS ON LIQUID LIMIT AND UNDRAINED SHEAR STRENGTH BEHAVIOUR OF CLAY SOIL
Waleed
Sulaiman MUSTAFA
Civil Engineering, Technical Institute of Bardarash, Duhok Polytechnic University
author
text
article
2017
eng
This study presents the results of fall cone penetration tests conducted on clay and clay aluminum waste mixtures. The influence of aluminum waste (AW) gradations, which produced after cutting aluminum sections, on liquid limit and undrained shear strength of clay soil was checked throughout a series of tests. Three various particle gradations (4.75-0.075 mm, 0.6-0.075 mm, and 0.425-0.3 mm) of AW were added to low plasticity clay. The percentage of additive AW were 0%, 10%, 20%, 30%, 40% and 50%. The results of clay aluminum waste (CAW) mixtures explained that there is a linear relationship between cone penetration and water content. Liquid limit and undrained shear strength reached their minimum values at 10% of AW of both gradations (4.75-0.075 mm and 0.6-0.075mm) and at 30% of (0.425-0.3mm) AW gradation. By adding other percentages of AW, the amount of liquid limit and undrained shear strength were increased again. It was realized that the coarser the AW gradation the more the effect on liquid limit and undrained shear strength values. This may be due to the influence of larger particles of AW which made stronger connections between whole particles of AW and increased the resistance strength of the mixture against penetration. Also, a slight difference in both liquid limit and undrained shear strength values appeared when the gradation contains good amounts of same particle size.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
753
762
https://jesaun.journals.ekb.eg/article_116884_136be85e321be67c055b394fe7b82578.pdf
dx.doi.org/10.21608/jesaun.2017.116884
DESIGN OF MINIATURIZED AND HIGH ISOLATION METAMATERIAL-BASED MIMO ANTENNA FOR MOBILE TERMINALS
Ehab
K. I. HAMAD
Electrical Eng. Depart, Aswan Faculty of Engineering, Aswan University, Aswan 81542, Egypt
author
Mohamed
Z. M. HAMDALLA
Department of Electronics and Communication Engineering, Arab Academy for Science, Technology and Maritime Transport, Aswan, Egypt
author
text
article
2017
eng
This paper presents a compact design of highly effective reduced mutual coupling of two-element MIMO antenna for mobile terminals. In order to scale down the antenna size and to degrade the mutual coupling between the antenna elements, two complementary split ring resonators (CSRRs) are etched on the ground plane. Miniaturizing of about 60 % in the antenna total area is achieved and about 10 dB improvement in the mutual coupling among the radiating elements is earned. The idea of total area reduction and mutual coupling reduction are verified via simulations, which are performed via 3D full-wave model, and measurements.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
763
772
https://jesaun.journals.ekb.eg/article_116885_ab51683f8f3bb1c06ed8f48770724a70.pdf
dx.doi.org/10.21608/jesaun.2017.116885
EFFICIENT RISK MANAGEMENT: CAUSE AND EFFECT ANALYSIS OF KEY RISKS OF COMPLEX CONSTRUCTION PROJECTS IN EGYPT
Khodeir
.
Architecture, Ain Shams University, Cairo, Egypt
author
Laila
Mohamed
Architecture, Ain Shams University, Cairo, Egypt
author
text
article
2017
eng
Complex construction Projects represent time-consuming projects that have complexity in structural systems, building control systems or in their architectural design. In general, the objective of risk management is to predict, reduce and avoid the risks and their consequences. The primary objective of this research is to undergo a cause-and-effect analysis of the key risks that face complex construction projects, thus enhancing their project delivery success. The methodology used is an integrative review of the existing literature on the key concepts including risk management of complex construction projects .In addition, qualitative analysis of the case study of the Grand Egyptian Museum, as one of the pioneering complex projects, has been performed to analyze key causes of risk in this type of projects. The study covers the period from 2014 to 2016, as the project is still in progress. Finally, a survey targeting stakeholders involved in the construction and management of complex construction projects was conducted. The study findings shed light on the key causes and effects of risks affecting the success of complex projects and their effect on different project constraints. The study results showed that root causes of risks are mainly related to managerial complexities in the project. These complexities are namely: lack of proper management and uncertainties in management goals and methods. Technical complexities, however, have the most severe impact on the risks affecting complex constructions. The top identified risk was found to be improper planning, followed by legislative risk, and scope changes. These results make it clear that managerial complexities are of the same importance as technical complexities. Thus, this study underscores the role played by efficient management in managing risks and in enhancing the success of complex construction projects delivery process
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
773
790
https://jesaun.journals.ekb.eg/article_116886_890a9b5d85139f64ad12b696fca4e42e.pdf
dx.doi.org/10.21608/jesaun.2017.116886
RECYCLED SHIPPING CONTAINERS AS A TOOL TO PRACTICE MODULARITY IN ARCHITECTURE STUDIO
Ebtehal
Galal El-Deen Mohamed
Department of Architecture. Faculty of Engineering, Mataria. Helwan University, Egypt
author
text
article
2017
eng
The paper proposes a new approach to practice modularity in architecture studios by offering fixed shipping container units to be adopted in architecture educational process, the main goal of this educational adaptation is to offer a new alternative to assess the Modular Design Process by integrating sustainable approach with educational one for early years’ students, Qualitative and quantitative research designs were adapted to provide flexible approaches through the course stages which depends on the aim of each stage. Different methods will be applied to students to examine the effectiveness of using containers to develop modularization concept through all design process, and to encourage them discussing new skills with developing old ones. The grading system, analyzing data, two questionnaire and external judgment committee will be the main tools to be used. Recommendations will offer other methods to improve teaching Modularity, especially in the preliminary stages of design process to develop and enhance the student’s skills.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
791
803
https://jesaun.journals.ekb.eg/article_116887_e87959f36c386db92ca34568fe7be9c3.pdf
dx.doi.org/10.21608/jesaun.2017.116887
THE CORRELATION BETWEEN CONTEMPORARY ARCHITECTURE AND LOCAL ENVIRONMENT
Ussama
M. A. Saleh
Department of Architectural engineering, Faculty of engineering at Shoubra, Benha university, Egypt.
author
Islam
Ghonimi Ibrahim
Department of Architectural engineering, Faculty of engineering at Shoubra, Benha university, Egypt.
author
text
article
2017
eng
The research mainly discusses the correlation between the effect of technological evolution and the environmental aspects on architecture. The research depends on data analysis of theoretical study which carried out to explain the features of this effect. The environment could be classified to two major elements: the natural environment and built environment. Through ages, both natural and built environment are responsible for formulation of cultural and religion identity of any civilization which identifies it and achieves respect and appreciation from various civilization. On other hand, the development of societies requires paying attention and keeping up with technological evolution through ages. Technological evolution provides new tools and techniques for many fields in societies especially architecture as many features are affected by it such as: the evolution of design process, building materials, structural systems, and construction methods. As well, the architectural thinking is developed through the implementation of new digital design methodologies, new building materials configuration, and innovative construction methods. This development formulates a contemporary architecture which differs in its concept and applications from any previous architecture concepts appeared in all ages before information technology age. Recently, a huge confusion caused by approaches which discussed and presented by theorists to achieve the balance between the technological capabilities and environment determinants to submit an objective architecture which meet the need of activities applied in and do not care about the form without the content. The research offers a methodology to measure the extent to which contemporary architecture is connected with the place. The proposed methodology depends on the different dissertations that call for the establishment of a balance between originality and contemporary and is used to evaluate the architectural practices which are connected with the place. The practical study relies on applying the central axis of new Cairo as a case study to follow the Egyptian contemporary practices which are connected to the place.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
804
829
https://jesaun.journals.ekb.eg/article_116888_46aa63246d2a9d9acabaa5b66a20ea21.pdf
dx.doi.org/10.21608/jesaun.2017.116888
ANALOGY CONCEPT BETWEEN FUNCTION OF THE ORGANISMS SKIN AND FUNCTION OF BUILDING SKIN
Mona
M. Hosni Agour
Department of Architectural engineering, Faculty of engineering at Mattaria, Helwan university. Egypt.
author
text
article
2017
eng
Nowadays, the building skin acts as an intermediate between the external environment and its enclosed spaces. It is considered as the first line of defense for protecting buildings from the surrounding environment. The concept of building skin makes it one of the main solutions in the face of environmental changes. Skins of the organisms provide an important database of multiple adaptive strategies and make use of them in the architecture of the building's skin.The research discusses the concept of analogy between the function of skin in living organisms and its function in architecture, and the importance of this concept to explore the problem of the lack of clarity of the meaning of analogy in different stages of the process in the corresponding architectural functions, cases of usage, and the relationship between environmental variables that affect these functions and mechanisms. The research then explores the four main themes of the skin function – thermos regulation, water balance, protection and communication – and how can be analogized to adapt the environmental conditions and reflect the analogy between the skin of organism and the building skin. Finally, the research describes the analogy relationship between the function in each theme, in addition, a comparative analytical study that deals with the presentation of the similar model and analogy applications in the buildings in order to achieve the ways of applying the ideas to solve the problems that the designer can meet for compatibility and adaptation to the surrounding environment, thus promoting the development of various design solutions. In addition, it opens up new horizons that enable designers to create accurate design and morphological solutions from the beginning of design.At the end of the research, the results will provide help to designers to understand the determinants of those functions and processes that can improve the performance of building skins to incubate environmental changes.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
830
846
https://jesaun.journals.ekb.eg/article_116889_d41d8cd98f00b204e9800998ecf8427e.pdf
dx.doi.org/10.21608/jesaun.2017.116889
THE EFFECT OF THE INSPIRATION OF TRADITIONAL ARCHITECTURAL FACADES ON THE FEATURES OF MODERN ARCHITECTURAL DESIGN
Eman
Faize Maher Basely
Department of Architecture, Faculty of Fine Arts, Helwan university, Egypt.
author
Tamer
Reffat Abdel Hamid
Department of Architecture, Canadian higher institute for Engineering technology and Administration.
author
text
article
2017
eng
The preservation of privacy and identity is very important to be sure that the architecture today is being as an extension of the previous time architecture and also as a bridge to the architecture of tomorrow. The form is an important part of the dedication of architectural identity, when the principles of architecture and sustainability are being understood; the architecture’s privacy which occupies a prominent place in architectural practice will be inspired. The methods of architectural formation have been linked to the fulfillment of different human requirements; finally the general architectural output can be classified in two main directions:The first approach: “direct inspiration for the physical properties” in order to reproduce them and the use of its components and details of its forms in the construction of contemporary architectural and modern architectural models of different functions and have to do with the assets of those companies.The second approach: “symbolic and moral inspiration” This approach is based on the systematic research of various methods of extrapolation, analysis and replacement of the local conditions and contemporary cultural data of the time. Hence, the development of concepts and the conclusion of mechanisms that fit consciously and selectively with the modern and local conditions to produce an architectural and urban style which does not inspire necessarily traditional elements as they are, but produce a traditional local architectural character that is compatible with concepts, traditions and preserves the cultural and civilization specificity of the local environment.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
847
862
https://jesaun.journals.ekb.eg/article_116891_2748d4dd918a124759d68e280ac8afcb.pdf
dx.doi.org/10.21608/jesaun.2017.116891
PROCESS ORIENTED GUIDED EXPERIENTIAL LEARNING AS AN INNOVATIVE TEACHING METHOD IN LIGHTING EDUCATION IN ARCHITECTURE
Ashraf
Ali Ibrahim Nessim
Architectural Engineering Department, Faculty of Engineering, Ain Shams University.
author
text
article
2017
eng
As acknowledged, exterior lighting brings its own unique elements to the nighttime scene. The exterior lighting designer's challenge is to define and enhance the building appearance, thus adding ambiance to the exterior night scene.This pedagogical study aims at evaluating the experience of the application of Experiential learning method in lighting education in architecture as it presents the lessons learned during and the outcomes of the International Lighting Design Workshop held in Kronach, Germany. The workshop is part of the preparations of a lighting festival held annually called “KRONACH leuchtet” or “Kronach in Lights”. The workshop covers both theoretical parts and practical experiences. The workshop targets undergraduate and postgraduate students. To achieve the aim of the workshop, the participants were involved in a process oriented “Experiential Learning” approach. The use of modern and innovative educational technology and Experiential learning in lighting education is valuable in conducting efficient training and professional induction of participants. The detected findings of this paper could help those involved in teaching lighting courses as the experience of using the Experiential Approach method shows promising character of its application in the lighting education. It can be used to improve the communication skills, critical thinking and problem solving skills of participants. Meanwhile, the paper offers relevant methods of introducing future architects to the study of lighting in architecture.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
863
877
https://jesaun.journals.ekb.eg/article_116892_31e2a6c05329f05b6aaf7acf40da8691.pdf
dx.doi.org/10.21608/jesaun.2017.116892
PERFORMANCE IMPROVEMENT FOR PUBLIC CONSTRUCTION PROJECTS USING RISK ANALYSIS
Mohamed
Said Meselhy Elsaeed
Architecture Department, Faculty of Engineering, Fayoum University, Fayoum, Egypt
author
text
article
2017
eng
In the last five years, many of the construction projects faced a lot of new variables which stopped or delayed in the commission some of these projects, Most of them its cost had been raised up or implemented with low quality and low performance not as it was planned. The new variables which faced the construction projects came as result of new changes on the international level which effected directly on our local level, The political term made new regulation and policies effected on the construction industry, Social term created negative behavior between the partnerships in the construction industry, Economic term made unexpected results on the construction projects and the investment projects on general that because the increasing in the building materials cost and the labor cost rates which led to raise up the total budget of this projects not as it was planned.The research aims to achieve the risk analysis job plan which is leading improve the performance of public construction projects with that new variable in the last five years through presenting a risk analysis job plan (risk planning, risk identification, qualitative analysis, quantitative analysis, risk treatment and risk monitoring and control) of a public construction project on the local level as a case study. The research will present the effect of the risk analysis on the public construction project’s performance to be able to face the uncertainties events through the implementation stage.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
45
v.
No 6
no.
2017
878
899
https://jesaun.journals.ekb.eg/article_116893_233bdce3051ad6f95b9b6158331a73b9.pdf
dx.doi.org/10.21608/jesaun.2017.116893