COMPARISON BETWEEN SINGLE AND DOUBLE ANCHORED SHEET PILES WITH SIMPLIFIED APPROACHES TO SOLVE THE STATICALLY INDETERMINATE SYSTEMS
Dina A.
Emarah
Construction Research Institute, National Water Research Center, Ministry of Water Resources and Irrigation, Egypt
author
Safwat A.
Seleem
High Institute of Engineering, 15th May City
author
text
article
2016
eng
The paper studied a case of anchored sheet piles that exposed to surcharge loads at different distances from the wall. Experimental works were conducted on two different systems of single and double anchored sheet pile walls. Also, numerical simulations were performed on both systems using PLAXIS. The experimental and numerical results were compared. The comparison showed the advantages of using double anchored sheet pile instead of single anchored one. It was found that a large reduction occurred in the values of maximum bending moments in the double anchored system, in addition to a significant reduction in the values of anchor forces. This paper also produced three simplified approaches aiming to solve the statically indeterminate system of double anchored sheet pile exposed to surcharge loads placed at different distances from the sheet pile wall.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
659
674
https://jesaun.journals.ekb.eg/article_117622_1fba348d7a8a6ff6a5b32305238ee5f5.pdf
dx.doi.org/10.21608/jesaun.2016.117622
DEVELOPMENT OF STEEL FIBER-REINFORCED SELF-CONSOLIDATING CONCRETE FOR REPAIRING PURPOSES
Yehia. A.
Hassanean
Civil Engineering Department, Assiut University, Assiut, Egypt.
author
Mohammed M.
Ahmed
Civil Engineering Department, Assiut University, Assiut, Egypt.
author
Kamal Abas
Assaf
Civil Engineering Department, Assiut University, Assiut, Egypt.
author
Amr E. M.
Abdallah
Civil Engineering Department, Assiut University, Assiut, Egypt.
author
text
article
2016
eng
Fifteen self-consolidating concrete (SCC) as well as five steel fiber-reinforced self-consolidating concrete (SFR-SCC) mixes using full-length crimped steel fibers were developed and tested in order to optimize a suitable (SFR-SCC) mix for repair of beams. Water-cementitious materials (w/cm) ratio, sand/coarse aggregate ratio and presence of basalt dust were the main variables taken into consideration. The test results showed that the mix design for the SCC mixes without steel fibers can be achieved by satisfying the flowability criterion. But for the design of self- consolidating concrete mixes with steel fibers , both the flowability and passing ability criteria must be satisfied. Basalt dust was found to be necessary for SCC mixes without fibers with sand/coarse aggregate ratios of 0.9 and 0.8, and also for developing SCC mixes with crimped steel fibers. SFR-SCC mix with sand/coarse aggregate of 1.1 had satisfactory results in both fresh and hardened properties. SFR-SCC mixes with sand/coarse aggregate of 0.9 and 0.8 did not satisfy fresh properties criteria even with dust/coarse aggregate ratio of 0.4. The suggested SFR-SCC mix was used to repair a beam cracked due to shear stresses. For this purpose, two RC beams were cast and tested under three-point loading. One beam was tested as control beam and the other beam was repaired using the suggested mix. The inclined cracking and ultimate load of the repaired beam were increased by 87.5% and 91% comparing to the control beam, respectively. The flexural stiffness was increased significantly for the repaired beam comparing to the control beam. The test results also showed the great contribution of SFR-SCC in both compression and tension zones. Keywords: full-length crimped steel fibers, self-consolidating concrete, steel fiber-reinforced self-consolidating concrete, shear repairing.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
675
689
https://jesaun.journals.ekb.eg/article_117623_36248724c78bd7461ebcdac3ce4e326d.pdf
dx.doi.org/10.21608/jesaun.2016.117623
EFFECT OF ALUM COAGULATION ON IRON REMOVAL IN AERATED GROUNDWATER USING RAPID SAND FILTERS
Mohamed El-Sayed
El-dardeer
Civil Eng Dept, Faculty of Engineering, Assuit Univ, 71516 Assuit.
author
Ahmed Abdel Halim
Mohamed
Civil Eng Dept, Faculty of Engineering, Assuit Univ, 71516 Assuit.
author
Ali Abdel Rahman
Mohamed
Civil Eng Dept, Faculty of Engineering, Assuit Univ, 71516 Assuit.
author
Heba Mohamed Safwat
Abdelazim
Civil Eng Dept, Faculty of Engineering, Assuit Univ, 71516 Assuit.
author
text
article
2016
eng
The oxidation process of dissolved iron particles in water changes the iron into red-brown solid particles (particulate), which settle down in the water. Those large particles that settle down in the water can be handled. Nevertheless, iron that does not procedure large enough particles to settle down remains suspended (colloidal iron) and thus leaves the water with red tint. Unfortunately, these particles threat the industry and the municipal of water supplies. This is due to formation of scales as well as blockage of water pipes that lead to economic problems. Numerous studies have been conducted to study the effect of using oxidation processes followed by the filtration process only for the removal of iron from water. This study introduces a comparison of filtration of aerated raw water though a filter of sand bed with and without Alum as a coagulant prior to filter. A synthetic iron dozes are added to tap water to represent a pre-determined different concentrations of iron as 2 and 3 mg/L which result in 14 and 32 NTU, respectively, after aeration of raw water. The effluent of water was taken at regular time intervals to monitor the progressive rate of removal of these elements for different values of filtration rates 120, 180 and 240 m3/m2/day. A single layer gravity rapid sand filter was used with sand bed of 70 cm thickness, effective diameter of 0.7 mm and uniformity coefficient of 1.57. During the experiments, the iron concentration and turbidity in the effluent were recorded at all the used filtration rates. The results show that the low limit of the removal efficiency of iron is 89% and the high limit is 97% without coagulation and 78% to 97% with coagulation. Also, the higher the concentration of iron and turbidity, in the influent, the higher the efficiency removal of filter for all filtration rates takes place. For all tested parameters of influent iron concentrations and filtration rates, the effluent iron concentrations and effluent turbidities within the allowable limits of Egyptian drinking water specifications (0.3mg/l for iron and 1.0 NTU for turbidity), except for filtration rates exceeds the 180m3/m2/day the turbidity was above these allowable limits for both cases using coagulant or not. It obvious, also, from experiments that at low concentration of influent iron (below 3 mg/l) and filtration rates up to 180m3/m2/day there is no need to coagulation process. Keywords: Iron removal, filtration, and coagulation.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
690
702
https://jesaun.journals.ekb.eg/article_117624_ef2c3dbe893def8b4ae646c1b2302368.pdf
dx.doi.org/10.21608/jesaun.2016.117624
AFFORDABLE HOUSING DELIVERY FOR THE LOW-INCOME GROUP IN YEMEN A STUDY FOR AL-SALEH HOUSING PROJECT AS A PILOT MODEL
Abdulmalek
Al-Jolahy
Dept.of Civil Engineering, Faculty of Engineering, Sana'a University, Sana'a, Yemen
author
text
article
2016
eng
This paper studies Al-Saleh Housing Project as a new model for affordable housing delivery for the low-income group in Yemen. The first phase of the project comprised construction of 5,018 housing units (apartments) with total built up area of 430,890 m2, distributed in eight governorates. To highlight the housing solutions that came out of the project, the research methodology included, along with the analytical and evaluation study of the project, the collection and analysis of data related to the existing housing status, former public housing projects and the involvement of the private sector in housing activities. It was found that, Al-Saleh Housing Project provided practical solutions to make housing units affordable and suitable for the majority of the low-income beneficiaries, in technical and financial aspects, i.e. quality, appropriateness, low-cost, ease payment …etc. The project also established a wider and more comprehensive housing stage than their predecessors and has continuance measures. The study reached to the importance of a continuous delivery for affordable housing through a housing policy that needs to take into account the integration and empowerment of the private sector as a key partner in housing supply, and to arrange for the development of a regulatory framework for housing, as well as national engineering norms to guide and control the quality and safety in implementing the low-cost housing buildings. At the end, these arrangements are intended to lead to the growth and development of housing trade, as a feeder to the sustainable development in all Yemeni cities, in the direction of the housing problem solution.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
703
725
https://jesaun.journals.ekb.eg/article_117625_d8f2292a9c8eb96354df60ed03a1e4d6.pdf
dx.doi.org/10.21608/jesaun.2016.117625
ENHANCED SATELLITE IMAGES FUSION ALGORITHM USING COMBINED BI-DIMENSIONAL EMPIRICAL MODE DECOMPOSITION AND SHEARLET TRANSFORM BASED ON QGA OPTIMIZATION
Usama
Sayed Mohammed
Electrical Engineering Department,Faculty of Engineering,Assiut University,
Assiut, Egypt
author
Osama Ahmed
Omer
Electrical Engineering Department, Aswan University, 81542, Aswan, Egypt;
Arab Academy for Science, Technology and Maritime Transport, Aswan, Egypt
author
Amal Ahmed
Hamed
National Authorities for Remote Sensing and Space Science, Aswan, Egypt
author
text
article
2016
eng
The satellite images fusion is a process of merging data of the same scene from the panchromatic (PAN) and multispectral (MS) images captured by different instruments. This paper introduces a new satellite images fusion method using Bidimensional Empirical Mode Decomposition (BEMD) and shearlet Transform (ST). BEMD is an efficient method for satellite images processing due to its advantage of spectral data maintaining. Basically, it is used to transform the MS image into subsets named Intrinsic Mode Functions (IMFs). Hence these IMFs and the PAN image are divided by shearlet into high and low frequencies subsets, then the high frequency ones of IMFs are replaced with their corresponding subsets of the PAN image. At last, inverse shearlet and inverse BEMD are implemented to get the fused MS image. Shearlet is preferred due to its optimal representation of the anisotropic elements in the image and due to its capability in processing the continuity and digital data unlike curvelet and contourlet. The experiment results illustrated that the proposed method extracts more spatial details from PAN images with fewer losses in spectral quality of MS images compared to other classic fusion methods. For more enhancements, the fusion weights are estimated efficiently by a quantum genetic algorithm (QGA)-based approach. Keywords: Image, satellite, fusion, BEMD, Shearlet, QGA.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
726
737
https://jesaun.journals.ekb.eg/article_117626_b4f7ed0f02d2d0595abc3c9da0210ff5.pdf
dx.doi.org/10.21608/jesaun.2016.117626
ENVIRONMENTAL ASSESSMENT OF INDUSTRIAL ZONES IN THE NEW CITIES IN EGYPT
Amal Saad
Elgohary
Dept. of Architecture, Faculty of Engineering, El-Mansoura University
author
Wael Seddik
Moustafa
Dept. of Architecture, Faculty of Engineering, El-Mansoura University
author
text
article
2016
eng
The planning of Industrial areas in new cities in Egypt has their special design standards stemming from the needs of the society, its economy and climate characteristics. However, it can effectively take advantage of the experiences of the developed countries in this field; either condition was similar or different to get to the environmental sustainability of these cities. As the Arab Republic of Egypt suffers from blurred vision in industrial zones and new urban planning, so paper deals with the study of industrial zones in the new Egyptian cities and their environmental problems and developing proposals for achieving the environmental sustainability In order to achieve the aim of the research was presented a different method of environmental assessment, such as matrix foundations and environmental standards and the African city index and index Dimension, to evaluate the industrial zones in the cities. And then try to access a methodology in the context of the most important determinants influencing the performance of the region as a whole and of energy, water, and transport emissions, air, waste and resources.. The research has come to the positives and negatives for the new cities, of the Arab Republic Egypt and put the necessary recommendations to take advantage of the positives and avoid the negatives. Keywords: Environmental Assessment - Sustainable Development - Industrial Zones - New Cities - Egypt
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
738
752
https://jesaun.journals.ekb.eg/article_117628_5e040c3b0ae75f376354b7393fb9076e.pdf
dx.doi.org/10.21608/jesaun.2016.117628
TEACHING METHODS AND STYLES AND ITS IMPACT ON THE DESIGNING OF ARCHITECTURAL DESIGN STUDIO
Bahaa Eldin
Moustafa
Dept.of Architecture, Faculty of Engineering, Beni-suef University, Beni-suef, Egypt.
author
Ezzat Abdelmoneim
Merghany
Dept.of Architecture, Faculty of Engineering, Assiut University, Assiut, Egypt
author
Azza Mohammed
Ahmed
Dept.of Architecture, Faculty of Engineering, Assiut University, Assiut, Egypt
author
text
article
2016
eng
Architecture acts as the mirror of the people. It, also, guides its renaissance and progress. So, it was necessary to develop architectural education in order to support and establish this renaissance taking into account the special conditions of society. In the long term, architecture studio was considered as a center for teaching and learning. This studio acted as the physical environment in this kind of education. Inside this studio students interact actively with each other, as well as with the stuff members using different educational methods and styles. Therefore, we need to provide Architecture studios in each architecture school. These studios have to be suitable for and compatible with the different methods of teaching architecture in order to be use in design subjects and meet their needs. This study aimed to evaluate design studios spaces in architecture departments at Egyptian universities and suggest changes required to provide the tools and mechanisms necessary to teach the different teaching methods. The study presented previous studies in this field to identify the methods and styles of teaching clearly and physical requirements of the built environment. In addition, the researcher analyzed five cases of architectural design studios from governmental, private, regional and modern universities and institutes. By comparing the characteristics of those studios with the requirements proposed by the previous researches and studies, we can identify shortcomings in designing Design Studio in each case. The research found a set of recommendations for the development of design studios in Egyptian architecture schools to suit different educational methods and achieve the main goal of architecture studio.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
753
773
https://jesaun.journals.ekb.eg/article_117630_eeede7e1077470a8b0090a9130dec780.pdf
dx.doi.org/10.21608/jesaun.2016.117630
FORMULATION OF A SYSTEM FOR PREPARATION OF STRATEGIC URBAN PLANS OF THE EGYPTIAN CITIES A CASE STUDY: ISMAILIA AND FAYOUM GOVERNORATES
Mahmoud Fouad
Mahmoud
Architecture and Urban Planning department, Suez canal university.
author
text
article
2016
eng
The State established the National Project for preparation of the general and detailed strategic plans of the Egyptian cities during the last ten years, through "participatory planning" methodology, to achieve the competitiveness of the city and formulating a vision for the future, and as a necessity imposed by the urban problems of the Egyptian society in view of the important role of the city in the achievement of the economic and social development. The current status indicates the laxity of local administrations to participate in the preparation of the strategic plans and the interest only in the discussion about the structural stipulations and the urban sprawl areas, in addition to the lack of coordination between the strategic plans output (proposed projects) and the preparation of the sector plans and their budgets by the various ministries. This would lead to the waste of effort and resources. The research aims to survey the opinion of some participants in the decision-making in different sectors including urban development and the preparation and implementation of strategic plans, so as to find out the extent of benefit from the strategic urban plans, in the preparation of development plans and the distribution of its funds. The study is based on the inductive and analytical method to review the term of reference (TOR) for the preparation of the general and detailed strategic plans of the Egyptian cities, and on a questionnaire to explore the opinion of some of the stakeholders participating in the preparation of the strategic plans through individual meetings and discussion groups, in addition to a review of the planning laws at the local level. The study concludes a proposed system as an approach for the implementation of the urban strategic plans to achieve the desired social and economic goals, and to prevent the negligence of the urban strategic plans. This system is based on five basic pillars (institutional framework and legislation, decentralization, variation of funding resources, community participation and capacity building, the availability of adequate areas of land), and require the presence of an effective compatibility among them, taking into account the local nature of each city. Keywords: Strategic plans - Egyptian cities - development plans - decentralization - Participatory planning.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
44
v.
No 6
no.
2016
774
791
https://jesaun.journals.ekb.eg/article_117631_542cf8e517c2d31a6f123ad339592356.pdf
dx.doi.org/10.21608/jesaun.2016.117631