@article { author = {Salama, Radwa and elsersawy, Heba}, title = {COMPARISION BETWEEN TWO NUMERICAL MODELS FOR PREDICATION OF HYDRAULICS AND MORPHOLOGICAL CHANGES IN THE RIVER NILE (FROM KM 633 TO KM 645 UPSTREAM El-RODA GAUGE STATION)}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {749-764}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.39116.1002}, abstract = {The numerical models have effective and necessary tools for rivers hydrological and morphological studies. Numerical models are useful when results are required on scales applicable for hydrological and morphological changes, where velocity and water depth distributions are significant especially in river reaches. In the present study , two well known hydraulic models are used to simulate the River Nile hydraulics and morphological changes. A sensitivity analysis is carried out for the two models to investigate the features and disadvantages of each model and give recommendations for their further applications. The performance analysis depends on field survey data and simulations. The two models are the SMS modules (FESWMS) model and the (Delft3D) model. The field data were collected for a study reach of 12 km which is located between km 633 to km 645, measured from El-Roda gauge station. The data included geometric and hydraulic data, that were gathered for calibration and validation of the models. The results indicated that both the SMS module and (Delft3D) model predicted the water surface elevations quite well. The sensitivity analysis showed that (Delft3D) model was more logical to mesh resolution than the SMS module and SMS model presented a better fit for the hydraulic variables. However, Delft3D presented a better fit for velocity and morphological changes.}, keywords = {Morphological changes,Hydraulics,SMS,Delft3D and River Nile}, url = {https://jesaun.journals.ekb.eg/article_109760.html}, eprint = {https://jesaun.journals.ekb.eg/article_109760_feb6c48ee41c4d00b0d2693634491ac9.pdf} } @article { author = {Moussa, Ghada and Abdel-Raheem, Ashraf and Abdel-Wahed, Talaat}, title = {INVESTIGATING THE MOISTURE SUSCEPTIBILITY OF ASPHALT MIXTURES MODIFIED WITH HIGH-DENSITY POLYETHYLENE}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {765-782}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.39052.1001}, abstract = {Flexible pavements are susceptible to the damaging effects of moisture, causing various kinds of problemes for asphalt such as stripping. That reduces the durability and serviceability life of pavements and consequently increases the construction and maintenance cost. The aim of this research is to study the moisture sensitivity of the hot asphalt mixture with high-density polyethylene as an asphalt binder modifier. Asphalt 60/70 was mixed with several concentrations of high-density polyethylene (HDPE) ranging from 2% to 8% by bitumen weight using a high shear mixer at a temperature of 180 0C and a speed of 4000 rpm for 60 minutes. Penetration depth, softening point, rotational viscosity (RV), and scanning electron microscopy (SEM) tests were performed on both the conventional and HDPE-modified binders. Asphalt mixtures were designed according to the Egyptian specifications using the Marshall method. Conventional and HDPE-modified asphalt mixtures' moisture susceptibilities were evaluated through indirect tensile strength (IDT) and loss of stability tests. Results of scanning electron microscopy (SEM) showed that HDPE was homogeneously dispersed through the binder with no polymer cluster formations. Testing results revealed that adding high-density polyethylene at a concentration of 4% gives superior performance in most tests. Adding HDPE significantly improved the properties of asphalt binder, increased the hardness of the asphalt mixture and reduced the effect of moisture damage.}, keywords = {high density polyethylene,Polymer modified binder,Moisture susceptibility,Indirect Tensile Strength,loss of stability}, url = {https://jesaun.journals.ekb.eg/article_110349.html}, eprint = {https://jesaun.journals.ekb.eg/article_110349_69adb2f1a84bd864a575e1f94c7a6d2d.pdf} } @article { author = {Hekal, Nasr}, title = {IMPROVED DESIGN CRITERIA FOR EXTENDING BRIDGE-LIKE INTAKES INTO OPEN CHANNELS}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {783-804}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.111400}, abstract = {Extended water intakes are structures established at river sides to divert water for multiple uses and purposes. Previous studies have only focused on extending the intake to a sufficient water depth for ensuring permanent abstraction. They used physical and numerical models to predict the trend of the site riverbed morphological changes for identifying the lowest bed levels and biggest depths to which intakes could be extended. However, they have ignored other parameters that govern the extension. This paper aims to investigate those parameters and introduce a practical and scientific basis that helps estimate the minimum (min) offshore extension distance of a water intake. It is the distance between the point where the annual min water stage meets the channel bank and the point where a critical water depth is sufficient to submerge the suction pipe inlet without producing vortices that affect both the pumping system and channel bed. Based on the definition of the extension distance, the critical water depth under the min water stage at the channel cross section concerned has to be computed. By analyzing the min water stage, it was found that it is equal to the sum of a submergence depth, the diameter of the suction pipe inlet or (the strainer length), and a clearance distance above the channel bed. Doing further analysis, it was found that the submergence depth value depends on the water station discharge requirements, the water suction velocity at the pipe inlet, and the maximum height of a water wave generated by a moving navigation boat near the intake as well as the channel bed morphology. Also, the value of the clearance distance above the bed was found to be a function of the suction pipe diameter or (the strainer length). To compute the min extension distance, a Spreadsheet Model was developed to correlate all the concerned parameters and help study as many scenarios as possible to find the most economical and safest distance. Finally, the research concluded that the computation of the min extension distance is governed by a number of factors such as the min water stage, water station discharge requirements, water suction velocity at the pipe inlet, and maximum water wave height generated by a moving boat near the intake.}, keywords = {Water Bridge-like Intakes,Offshore Extension Distance,Submergence Distance,Water Stage Recession}, url = {https://jesaun.journals.ekb.eg/article_111400.html}, eprint = {https://jesaun.journals.ekb.eg/article_111400_267af9611a00239ef7a46c181ae860d2.pdf} } @article { author = {Youssef, Mena and Ahmed, Abdel-Rahman and Ahmed, Mohamed and Farghal, Omar}, title = {A NUMERICAL STUDY ON SEISMIC PERFORMANCE EVALUATION OF RC RECTANGULAR COLUMNS STRENGTHENED WITH CFRP SHEETS}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {805-829}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.39384.1003}, abstract = {External confinement of reinforced concrete columns using fiber-reinforced polymer (FRP) sheets can significantly enhance their seismic behavior. This research presents a numerical investigation to evaluate the seismic performance of RC rectangular columns with limited cross-sections' aspect ratios (1, 1.5, and 2) strengthened with a fully wrapped CFRP jacket under constant axial and pushover lateral loads. Therefore, a three-dimensional finite element model was implemented via ABAQUS software, which has been adopted in this study, where the proposed model showed a reliable agreement with the previous experimental work. The studied parameters are: longitudinal steel reinforcement ratio, CFRP confinement ratio, and axial load/capacity ratio for each cross-section aspect ratio. The obtained numerical results have proved that the external wrapping of RC rectangular columns with CFRP sheets has effectively increased drift capacity ratios for cross-sections aspect ratios 1, 1.5, and 2. Moreover, the strengthening of RC rectangular columns using external CFRP wrapping increases the nominal shear and flexural strengths of the strengthened columns. Also, the effect of increasing the longitudinal steel reinforcement ratio can significantly decrease the ultimate lateral displacement and drift capacity ratios. Besides, with the increase of the axial load/capacity ratios, the drift capacity ratios significantly decrease for the strengthened RC rectangular columns.}, keywords = {Strengthened RC Columns,CFRP,seismic behavior,Ductility,flexural strength}, url = {https://jesaun.journals.ekb.eg/article_112703.html}, eprint = {https://jesaun.journals.ekb.eg/article_112703_d9715e948e2b23a285f454acaf056b23.pdf} } @article { author = {Abd El Raouf, Moamen E.}, title = {Stability of Geogrid Reinforced Embankment on Soft Clay}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {830-844}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.112941}, abstract = {The reinforcement by geotextiles or geogrids helps to improve the embankment stability and guarantee more uniform settlement. The factors effect on the stability of the reinforced embankment on soft clay, in terms of slope stability and sliding resistance has been studied using a finite element program (GEO5 program). In this paper, the effect of geogrid Spacing, the height of the first geogrid layer, unit weight of embankment fill, and the angle of internal friction was studied. The numerical model results indicated that the optimum spacing between the geogrid layers is 0.5 m.  Increasing the angle of internal friction for the embankment fill causes to increase the factors of safety. Increasing the density of the embankment fill causes to decrease the factors of safety. Also, it was recommended to install the first geogrid layer between the embankment base and underlying soft clay layer without any vertical distance.}, keywords = {Reinforced Embankment,Geogrid,Soft Clay,Lateral sliding,Stability of slope}, url = {https://jesaun.journals.ekb.eg/article_112941.html}, eprint = {https://jesaun.journals.ekb.eg/article_112941_abdf3556d66f5c2f6cc65716a2c652d2.pdf} } @article { author = {Fawzy, Mohamed and Mostafa, Yasser G. and Khodary, Farag}, title = {AUTOMATIC INDICES BASED CLASSIFICATION METHOD FOR MAP UPDATING USING VHR SATELLITE IMAGES}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {845-868}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.114602}, abstract = {Urban land cover classification using Very High Resolution (VHR) satellite images is a very important source of information for map updating. Egyptian environment has more challenges in feature extraction. The main problem lies in the spectral similarity between different land cover classes. Also, great diversity in sizes, shapes, and materials of each class. The main aim of this work is to represent a new automatic indices-based classification method for map updating using VHR satellite images. The method uses a set of spectral indices with their thresholds in consecutive order, chosen based on WorldView-2 (WV-2) bands, to classify land cover in the Egyptian environment. For this study, WV-2 satellite images with eight spectral bands were used. The proposed method is compared with five traditional classification methods; Minimum distance, Spectral angle mapper, Mahalanobis distance, Spectral correlation mapper, and Maximum likelihood method, which included in ERDAS 2015 software, for validation purpose and checking its stability. The results show that the extracted features with the proposed method can contribute significantly to update Egyptian medium scale maps. The average overall accuracy achieved with the proposed approach (75.31%) is higher than those obtained using Minimum distance (54.0%), Spectral angle mapper (69.50%), and Mahalanobis distance (73.63%). Also, it is near to those obtained by the Spectral correlation mapper (76.50%), and Maximum likelihood method (78.25%).}, keywords = {Feature Extraction,Satellite image,Spectral indices,map updating,worldview 2}, url = {https://jesaun.journals.ekb.eg/article_114602.html}, eprint = {https://jesaun.journals.ekb.eg/article_114602_ae168b221bdc873324bcfc1e47ed9fc3.pdf} } @article { author = {Shoaib, Mostafa H. and Mostafa, Yasser G and Abbas, Yousef A.}, title = {BUILDING EXTRACTION FROM VERY HIGH-RESOLUTION SATELLITE IMAGES FOR MAP UPDATING IN EGYPT}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {869-887}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.115673}, abstract = {Robust building detection from satellite images has been a subject of interest for several decades. Very High Resolution (VHR) satellite images support the efficient extraction of manmade objects. The main aim of this paper is to present an approach for building extraction from VHR satellite images for map updating in Egypt. To achieve this aim, a comparison of pixel and object-based classification techniques has been applied. Then, different refinement processes based on shadow, context, shape, and Digital Surface Model (DSM) data are carried out. Two study areas from the VHR satellite images for Assuit and Sohag cities are used. A comparison of the classification techniques shows that the Maximum Likelihood Classifier (MLC) for pixel-based technique and Support Vector Machine (SVM) for object-based technique give the highest overall accuracy results. Refinement based on shadow, context, shape, and DSM information improves the overall accuracy with an average of 18%. Thus, the building extraction results can contribute significantly to update maps in Egypt.}, keywords = {Building extraction,Pixel-based,Object-based,classification,Accuracy Assessment,map updating}, url = {https://jesaun.journals.ekb.eg/article_115673.html}, eprint = {https://jesaun.journals.ekb.eg/article_115673_1a3263d92970cfc6405b3103b524a3ad.pdf} } @article { author = {Elsibaey, Mohamed. O. and Awadallah, Zakaria. H. and Zakaria, Mohamed and Farghal, Omar. A.}, title = {STRENGTHENING OF REINFORCED CONCRETE SQUARE COLUMNS BY MEANS OF FERRO CEMENT JACKET}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {888-909}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.118571}, abstract = {This paper presents an experimental investigation to clarify the behaviour of reinforced concrete square columns strengthened using ferrocement jacket. Strengthening using ferrocement jacket is relatively a new technique, which has a high strength/weight ratio, good resistance to cracking and impact loading, acceptable resistance to fire, and more resistance to corrosion than traditional materials. Ten reinforced concrete short columns with nominal cross-sectional dimensions of 200 × 200 mm with a total length of 1200 mm were cast and tested under axial loading until failure. The main parameters in this study were the number of layers of wire mesh, type of wire mesh, and the cement mortar strength. The results showed the effectiveness of the ferrocement jacket in improving the column capacity and reducing the vertical and lateral deformation. The results from the experiment were compared with the theoretical results obtained from the modified ECP 203 and modified ACI 318 equation codes.}, keywords = {Ferro cement jacket,Square column,and Strengthening of Columns}, url = {https://jesaun.journals.ekb.eg/article_118571.html}, eprint = {https://jesaun.journals.ekb.eg/article_118571_f11b23496583b217a26caf29c5032af1.pdf} } @article { author = {Eldiasty, Asmaa and Samra, Medhat and Eleishi, Alaa}, title = {SPACE SYNTAX AS AN EVALUATIVE AND PREDICTIVE TOOL TO EXPLORE URBANITY LEVELS IN NEW DAMIETTA CITY}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {910-926}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.120427}, abstract = {In New Damietta city, many residential neighborhoods have the appearance of empty, dull, and monotonous places. These neighborhoods have low levels of urbanity in terms of vital and flourishing street life. Some researchers attribute the low levels of urbanity in new cities to the urban planning approaches undertaken (the neighborhood unit). To conduct this research, we used space syntax analysis as a key method to study urbanity in New Damietta city. In addition to other methods such as direct field observations through which we observed land use patterns and activities occurred in the study area. Observed land use patterns and activities were mapped in Geographical Information System (GIS). This study finds out how space syntax is an effective tool that can evaluate the current situation of urbanity and how it can be used as a predictive tool in the planning processes in the forthcoming generations of new cities.}, keywords = {space syntax,Depth map,observations,new cities in Egypt,Urbanity}, url = {https://jesaun.journals.ekb.eg/article_120427.html}, eprint = {https://jesaun.journals.ekb.eg/article_120427_eb1689a893fcb12caac4d99c28cd954a.pdf} } @article { author = {Mobasher, Amir M.}, title = {INFLUENCE OF THE RESERVOIR SEDIMENTATION ON THE DAM OPERATION – A STUDY OF ASWAN HIGH DAM IN EGYPT}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {927-950}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.120433}, abstract = {Reservoirs are an important source of water supply, provide hydropower, reduce the deficiency influences, and provide flood protection. Due to the dam structure and reservoir founding, the releases from the dam has become more restrained and the hanging sediment concentricity summits have been decreased considerably and accumulated upstream the dam. Sediment siltation has increasingly reduced the efficiency of reservoir functionality throughout the years by declining the storage capability. Determining the reservoir sedimentation influence on the dam operation is important to holding current operation and preparing for future polices. The existing paper deals with the review and assessment of the reservoir sedimentation effect on operation of Aswan High Dam (AHD) in Egypt. A new simulation model was developed and calibrated for Aswan High Dam Reservoir (AHDR) to evaluate the reservoir sedimentation effects on the factors affecting the operation of the dam. These factors are Toshka spillway outflows, upstream water levels of AHD, dam safety, withdraw from the reservoir, the losses due to the evaporation and the hydropower generation from AHD. The results of the study displayed that the factors affecting the operation of AHD were affected due to presence of these deposits in AHDR. Therefore, the reservoir sedimentation effect should be considered to implement or develop of simulation models for AHDR.}, keywords = {Reservoir,Sedimentation,Dam Operation,Aswan High Dam,Nile River}, url = {https://jesaun.journals.ekb.eg/article_120433.html}, eprint = {https://jesaun.journals.ekb.eg/article_120433_f5f7934264a18bc242e9dc1836cfd3da.pdf} } @article { author = {Megahed, Salwa A}, title = {Developing a systematic framework for smart urban transformation towards sustainability: in the context of Egyptian case تطوير إطار منهجي للتحول الحضري الذکي نحو الاستدامة: في سياق الحالة المصرية}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {951-978}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.124883}, abstract = {Contemporary Egyptian cities are in need to ensure sustainable development and to address urban, social, economic and environmental problems. Despite the great potential of smart cities to improve the economy, conditions of cities and population conditions, this potential has not been fully realized, the frameworks and models of the current smart cities are still not enough to make the smart city concept successful in the context of Egyptian case. This paper aims to provide an in-depth systematic framework for urban transformation towards smart sustainable city in the context of Egyptian case. This study relied on qualitative and critical analysis of a selective set of literature and previous studies. The architecture of proposed framework is based on the conceptual theoretical model of the phenomenon of smart urban transformation; Analysis of strategic planning methodology for urban development; as well as the context of the Egyptian cities with regard to the application of smart city concept. The proposed framework is a guiding reference tool for policy makers, academics, executives or decision makers, enabling them to develop an effective and realistic strategic plan to make city smart rather than adopting policies and strategies that may not be compatible with Local context. That ensures more chances of success, based on a realistic and modern theoretical model of smart urban transformation.   المدن المصرية المعاصرة بحاجة لتصبح أکثر ذکاءً لضمان التنمية المستدامة ولمواجهة المشکلات الحضرية والاجتماعية والاقتصادية والبيئية الملحة. وعلى الرغم مما تتمتع به المدن الذکية من إمکانيات کبيرة لتحسين اقتصاد وظروف المدن وأحوال السکان؛ إلا أن هذه الإمکانات لم تتحقق بالکامل. فأطر ونماذج المدن الذکية الحالية لازالت لا تکفي لإنجاح تطبيق مفهوم المدينة الذکية في سياق الحالة المصرية نظرا لما تواجهه المدن المصرية من تحديات حضرية متفاقمة. فمن خلال مراجعة الأدبيات والدراسات السابقة تبين وجود نقص في الدراسات الخاصة بالمنهجيات والمقاييس لإدارة وتنفيذ عمليات التحول نحو المدينة الذکية – في سياق الدول النامية بشکل عام- کما أنه هناک فجوة معرفية في مجال الأطر المنهجية للتحول الذکي في السياق المصري؛ لذا تهدف هذه الورقة لتقديم إطار منهجي متکامل متعمق للتحول الحضري نحو المدينة الذکية المستدامة في سياق الحالة المصرية، وذلک بتطبيق منهجية التخطيط الاستراتيجي للتنمية الحضرية. وقد اعتمدت الدراسة على التحليل النوعي والنقدي لمجموعة انتقائية من الأدبيات والدراسات. وذلک للبناء المعرفي لظاهرة التحول الذکي للمدن؛ وکذلک لتحليل منهجية التخطيط الاستراتيجي للتنمية الحضرية وسياق الحالة المصرية. والإطار المقدم يتميز-عما طرح في الدراسات السابقة من أطر في سياق الدول النامية- باشتماله على: مرحلتي الاعداد والتحضير وتهيئة المدينة وتأتي اهمية تلک المراحل في مد الجسور بين الواقع والمأمول؛ مؤشرات الأداء الرئيسية في مراحل مختلفة مما يتيح مقارنة أداء المدينة قبل وبعد تنفيذ المبادرات والبرامج لقياس مستوى التقدم نحو الأهداف وتقويم الاستراتيجية بما يضمن استمرارية عملية التحول والتطوير. ويعد إطار العمل المقترح؛ أداة مرجعية استرشادية للمعنيين بالتنمية وصنع السياسات الحضرية في مصر، سواء الأکاديميين أو التنفيذيين أو صانعي القرار؛ تمکنهم من تطوير خطة استراتيجية فعالة وواقعية للتحول نحو مدن ذکية مستدامة بدلا من تبني سياسات واستراتيجيات قد لا تتوافق مع الواقع المحلي. مما يکفل زيادة فرص النجاح؛ وذلک لاستناده على النموذج النظري الواقعي والحديث لعملية التحول الحضري الذکي؛ ونموذج منهجية التخطيط الاستراتيجي للتنمية الحضرية؛ وکذلک أيضا سياق الحالة المصرية فيما يتعلق بتطبيق مفهوم المدينة الذکية المستدامة.}, keywords = {Smart Sustainable City,urban transformation,The Context of the Egyptian cities,Strategic Urban Planning المدينة الذکية المستدامة – التحول الحضري – سياق الحالة المصرية – التخطيط الحضري الاستراتيجي}, url = {https://jesaun.journals.ekb.eg/article_124883.html}, eprint = {https://jesaun.journals.ekb.eg/article_124883_f56bdca11a12e09afae5cbff6365d774.pdf} } @article { author = {Abdel Magid, Essam Salah Said}, title = {Residential balconies in contemporary Egyptian architecture: An analytical study الشرفات السکنية في العمارة المصرية المعاصرة: دراسة تحليلية}, journal = {JES. Journal of Engineering Sciences}, volume = {48}, number = {No 5}, pages = {979-997}, year = {2020}, publisher = {Assiut University, Faculty of Engineering}, issn = {1687-0530}, eissn = {2356-8550}, doi = {10.21608/jesaun.2020.124884}, abstract = {Balconies in residential buildings are an integral part of the housing unit; they are spaces that complement the housing unit because it provides the house with a relatively specific external space from which it interacts with the outside environment; in addition to providing a view of the external environment surrounding the housing unit. Residential balconies in contemporary Egyptian architecture are gradually losing their basic function in a large proportion of residential buildings in Egypt, especially in distracts with high population densities. In addition to the random treatments of the owners of housing units for their balconies with additions and finishing materials in different colors and shapes.Every housing unit is looking for individual excellence in its own balconies without taking into account the harmony between them and the facade of the building which is part of it or the surrounding environment in general, For this reason, the Egyptian National Authority for Cultural Coordination was considered to consider balconies a form of visual pollution in Egyptian cities.        The research aims to find out the reasons for the changes in the residential balconies in the contemporary Egyptian architecture in terms of function and general appearance, by studying the current situation of the residential balconies, and analyzing it to know the reasons for this change and its problems and thus suggest a set of treatments and controls that contribute to the improvement of the current situation and take into account in future designs. This is based on a systematic analysis based on the analysis of the studies carried out in this field, field studies, available information sources and relevant references.   تعد الشرفات في المباني السکنية جزء لا يتجزأ من الوحدة السکنية؛ فهي فراغات مکملة للوحدة السکنية لما توفره للمسکن من فراغ خارجي يتسم بخصوصية نسبية ويتم التفاعل منه مع المحيط الخارجي؛ إضافة إلى توفير إطلالة على البيئة الخارجية المحيطة بالوحدة السکنية. بدأت الشرفات السکنية في العمارة المصرية المعاصرة تفقد وظيفتها الأساسية تدريجيا في نسبة کبيرة من المباني السکنية في مصر وخاصة في المناطق ذات الکثافات السکانية العالية أو المطلة على شوارع ضيقة نسبياً وتتحول إلى مخزن للوحدة السکنية أو منشر للملابس، أو يتم ضمها للفراغ الداخلي للوحدة السکنية لزيادة مساحة الفراغ الداخلي؛ إضافة إلى ذلک العشوائية في معالجة أصحاب الوحدات السکنية للشرفات الخاصة بهم بإضافات ومواد تشطيبات بألوان وأشکال مختلفة کلا على حدة. فکل وحدة سکنية تبحث عن التميز الفردي في الشرفات الخاصة بها دون مراعاة التناسق فيما بينها وبين واجهة المبنى التي هي جزء منها أو البيئة المحيطة بشکل عام، وهو ما دعا الجهاز القومي المصري للتنسيق الحضاري إلى اعتبار شرفات المباني السکنية أحد أشکال التلوث البصري في المدن المصرية. يهدف البحث إلى محاولة الوقوف على الأسباب الحقيقية للتغيرات المستجدة على الشرفات السکنية في العمارة المصرية المعاصرة من حيث الوظيفة والمظهر العام؛ وذلک من خلال دراسة الوضع الراهن للشرفات وتحليله للوقوف على أسباب هذا التحول والمشاکل الناتجة عنه وبالتالي اقتراح مجموعة من المعالجات والضوابط التي تساهم في تحسين الوضع القائم ومراعاة ذلک في التصاميم المستقبلية؛ وذلک في إطار منهجي يعتمد على تحليل الدراسات التي تمت في هذا الاتجاه ودراسة وتقييم الوضع الراهن من خلال الدراسات الميدانية ومصادر المعلومات المتاحة والمراجع ذات الصلة.}, keywords = {Balconies,Residential Buildings,privacy,treatments,Visual pollution الشرفات – المباني السکنية – الخصوصية – المعالجات – التلوث البصري}, url = {https://jesaun.journals.ekb.eg/article_124884.html}, eprint = {https://jesaun.journals.ekb.eg/article_124884_ea42b84949b44b93a545a45b8b2eada4.pdf} }