Past and recent earthquakes events demonstrate that buildings with configuration irregularity are more vulnerable to earthquake damages. So it's essential to investigate the seismic response of these structures in active seismic zones to reduce the potential seismic damages. The configuration irregularities introduce major challenges in the seismic design of building structures. One such form of irregularity is the presence of re-entrant corners that causes stress concentration due to sudden changes in stiffness and torsion amplification in the buildings; hence causes early collapse. This, the conventional design codes have not recommendations for proper evaluation of these buildings yet. Thus, a constructive research into re-entrant corner irregularity problems is essentially needed greater than ever. The objective of this study is to grasp the seismic behavior of the buildings with irregular plan of L-shape floor plan through the evaluation of the configuration irregularity of reentrant corners effects on measured seismic response demands. The measured responses include inter-story drift; story shear force; overturning moment; torsion moment at the base and along the building height; top floor displacement; and torsional Irregularity Ratio. Three dimensional finite element model of nine stories moment resisting frame buildings as reference model is developed; six L-shaped models are formulated with gradual reduction in the plan of the reference model. The models are analyzed with ETABS using Equivalent Static Load (ESL) and Response Spectrum (RS) Methods. The results prove that buildings with severe irregularity are more vulnerable than those with regular configuration resulting from torsion behavior, and the additional shear force produced in the perpendicular direction to the earthquake input. Also, in the codal empirical equation for the calculation of fundamental period of vibration could not grasp significant higher vibration modes such as torsional vibration of irregular buildings that could significantly affect seismic demands.

Past and recent earthquakes events demonstrate that buildings with configuration irregularity are more vulnerable to earthquake damages. So it's essential to investigate the seismic response of these structures in active seismic zones to reduce the potential seismic damages. The configuration irregularities introduce major challenges in the seismic design of building structures. One such form of irregularity is the presence of re-entrant corners that causes stress concentration due to sudden changes in stiffness and torsion amplification in the buildings; hence causes early collapse. This, the conventional design codes have not recommendations for proper evaluation of these buildings yet. Thus, a constructive research into re-entrant corner irregularity problems is essentially needed greater than ever. The objective of this study is to grasp the seismic behavior of the buildings with irregular plan of L-shape floor plan through the evaluation of the configuration irregularity of reentrant corners effects on measured seismic response demands. The measured responses include inter-story drift; story shear force; overturning moment; torsion moment at the base and along the building height; top floor displacement; and torsional Irregularity Ratio. Three dimensional finite element model of nine stories moment resisting frame buildings as reference model is developed; six L-shaped models are formulated with gradual reduction in the plan of the reference model. The models are analyzed with ETABS using Equivalent Static Load (ESL) and Response Spectrum (RS) Methods. The results prove that buildings with severe irregularity are more vulnerable than those with regular configuration resulting from torsion behavior, and the additional shear force produced in the perpendicular direction to the earthquake input. Also, in the codal empirical equation for the calculation of fundamental period of vibration could not grasp significant higher vibration modes such as torsional vibration of irregular buildings that could significantly affect seismic demands.

The main target of this research is to allow modern distributed energy resources (DERs) to contribute effectively in the economic feasibility of hybrid renewable power generation system. There are several factors such as the net present cost (NPC), levelized cost of energy (COE), amount of greenhouse gases (GHG) emissions, and the ability of the hybrid system to meet the load at different meteorological conditions to consider when evaluating the effectiveness of hybrid generation system within microgrids. A multi-objective based optimization algorithm to reduce cost, emissions, and a combined solution between cost and emissions is investigated in this research. This research presents an approach to optimize a hybrid microgrid (HMG) system with different fuel options. The power management approach determines the optimal sizing of DERs based on ant colony optimization (ACO) algorithm. In order to find the best configuration, the obtained results are compared with genetic algorithm (GA), particle swarm optimization (PSO), and HOMER. Three isolated areas in Egypt with different metrological conditions are selected for optimization of HMG system, namely: Kharga, Saint Katherine, and Qussair. The results show that the combined optimal configuration of HMG system is better in satisfying load demands without violating any restraints.

The main target of this research is to allow modern distributed energy resources (DERs) to contribute effectively in the economic feasibility of hybrid renewable power generation system. There are several factors such as the net present cost (NPC), levelized cost of energy (COE), amount of greenhouse gases (GHG) emissions, and the ability of the hybrid system to meet the load at different meteorological conditions to consider when evaluating the effectiveness of hybrid generation system within microgrids. A multi-objective based optimization algorithm to reduce cost, emissions, and a combined solution between cost and emissions is investigated in this research. This research presents an approach to optimize a hybrid microgrid (HMG) system with different fuel options. The power management approach determines the optimal sizing of DERs based on ant colony optimization (ACO) algorithm. In order to find the best configuration, the obtained results are compared with genetic algorithm (GA), particle swarm optimization (PSO), and HOMER. Three isolated areas in Egypt with different metrological conditions are selected for optimization of HMG system, namely: Kharga, Saint Katherine, and Qussair. The results show that the combined optimal configuration of HMG system is better in satisfying load demands without violating any restraints.

Housing in Egypt consumes high energy for cooling. Bioclimatic building design is one of the strategies of sustainable devel-opment. This study aims to investigate the thermal performance and indoor air quality of solar chimney with passive cooling wind tower (SCPCW) on occupant’s comfort. Thermal performance of a full-scale SCPCW was experimentally investigated. The passive cooling design is integrated on the ceiling of 30m2 test house. Monitoring of indoor environment was carried out over a period of 2months in the summer season (August, September and early October) with a 2-min interval in order to calculate thermal comfort sensation, Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied. The results show that outlet air temperature from the wind tower is 27.3°C. Also, the calculated PMV is within the recommended range (− 0.5 PMV + 0.5). This indicates that occupants remain satisfied with indoor thermal environment after using the passive cooling system and the temperature difference between outdoor and indoor is approximately 8°C. The system achieves the acceptable air flow rate with average 450ppm for CO2 concentration during daytime. The results of this research provide information of the system applicability in the climate of Assiut during daytime in order to develop and install on top of real residential buildings in New Assiut, Egypt.

تعانى معظم المساكن البيئية التقليدية في مصر حالة من التدهور وسوء في التعامل معها أما بالهدم أو التعديل، بما ينذر للأسف باندثارها. وذلك نتيجة لعدة أسباب من أهمها: - التغير الحادث بالجوانب الثقافية والاجتماعية والاقتصادية. - انخفاض مستوى الاهتمام الحكومي وغياب أو عدم تفعيل القوانين والتشريعات الخاصة بالحفاظ على المساكن البيئية التقليدية، وعدم وجود إدارات للحفاظ داخل الهيكل الإدارى للمحليات يوكل إليه مهمة الحفاظ. - ضعف مستوى الوعي بأهمية الحفاظ على المساكن البيئية التقليدية. ويتطلب الأمر تضافر الجهود للحفاظ على تلك البيئات لما لها من أهمية وقيمة معمارية وعمرانية. 1-1- مشكلة البحث: تتعرض عمارة المساكن البيئية التقليدية بجنوب مصر لخطر الاندثار نتيجة لهدم الكثير منها خلال السنوات الماضية - وبخاصة بعد 25 يناير 2011م- وبناء مساكن جديدة مبنية بطرق البناء الخرسانية الحديثة. 1-2- فرضية البحث: يفترض البحث أن عملية الحفاظ على المساكن البيئية التقليدية بجنوب مصر يتطلب تطبيق القوانين الخاصة بالمحافظة على تلك البيئات، وضرورة العمل في عدة اتجاهات، حيث يركز البحث على دراسة احد هذه الاتجاهات وهو: - رفع الوعي بأهمية وضرورة الحفاظ على عمارة المساكن البيئية التقليدية. 1-3- هدف البحث: يهدف البحث -من خلال دراسة حالة قرية أبو الريش بأسوان- إلى التعرف على الأسباب التي أدت إلى هدم المساكن البيئية التقليدية واستبدالها بأخرى حديثة، وتقديم إطار مقترح للحفاظ على ما تبقى من المباني بتلك القرية يعتمد بشكل أساسى على رفع الوعى بأهمية الحفاظ على تلك المساكن.

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