Pub Date : 2022-07-31DOI: 10.21608/jesaun.2022.140556.1140
R. Khalil
Flash flood in urban area strikes mainly the road network. In fact, the streets during flood act as streams or overland flow paths. This jams the traffic, stops the public services, and interrupts the economic activities. Previous studies have treated floods in urban areas as if they were occurring in rural areas. This study presents a new approach that treats the road network as the path of the flash flood water. The new approach uses a 3D city model as the basis for hydrology analysis. This approach regards the building and the streets as part of the terrain that results in water flowing through the streets as it does in reality. The depth of flood water in the streets is calculated and used as a risk factor. Remote Sensing (RS) and Geographical Information System (GIS) technologies are used to obtain and prepare the required input data for the hydraulic model. Various flood scenarios were investigated for different return periods and flood risk code maps for the road network were generated. The obtained results showed that 41.2% of the road network in the study area is under high flood risk from fairly frequent rainfall events, and this percentage reaches 80% to 90% for low frequent flood events (50 years and 100 years flood). The new approach was evaluated by comparing the derived results with actual flood data and had an accuracy of 77%. The results of this study may help decision makers to take the necessary actions to protect people and property.
{"title":"A new approach to determine the flood hazard impact on road network using 3D city model","authors":"R. Khalil","doi":"10.21608/jesaun.2022.140556.1140","DOIUrl":"https://doi.org/10.21608/jesaun.2022.140556.1140","url":null,"abstract":"Flash flood in urban area strikes mainly the road network. In fact, the streets during flood act as streams or overland flow paths. This jams the traffic, stops the public services, and interrupts the economic activities. Previous studies have treated floods in urban areas as if they were occurring in rural areas. This study presents a new approach that treats the road network as the path of the flash flood water. The new approach uses a 3D city model as the basis for hydrology analysis. This approach regards the building and the streets as part of the terrain that results in water flowing through the streets as it does in reality. The depth of flood water in the streets is calculated and used as a risk factor. Remote Sensing (RS) and Geographical Information System (GIS) technologies are used to obtain and prepare the required input data for the hydraulic model. Various flood scenarios were investigated for different return periods and flood risk code maps for the road network were generated. The obtained results showed that 41.2% of the road network in the study area is under high flood risk from fairly frequent rainfall events, and this percentage reaches 80% to 90% for low frequent flood events (50 years and 100 years flood). The new approach was evaluated by comparing the derived results with actual flood data and had an accuracy of 77%. The results of this study may help decision makers to take the necessary actions to protect people and property.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121675480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-27DOI: 10.21608/jesaun.2022.141645.1146
Aya Salah
{"title":"المجتمعات العمرانية الجديدة المستدامة بين النظرية والتطبيق (دراسة تحليلية)","authors":"Aya Salah","doi":"10.21608/jesaun.2022.141645.1146","DOIUrl":"https://doi.org/10.21608/jesaun.2022.141645.1146","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124046599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-26DOI: 10.21608/jesaun.2022.141836.1144
C. Hanna, A. Aly, S. Shebl, Amr E. M. Abdallah
This study aims to analyze the behavior of natural and waste materials when applied to building brick for walls of residential buildings on the indoor temperatures and thermal comfort of residential buildings. In this study, small-scale residential rooms were built during a period of hot weather in Egypt. A comparison between models and a reference model using the traditional burned clay brick was conducted. The results indicate that the mud-brick leads to enhanced thermal behavior by 25% within comfort limits and the surface temperature difference could reach 4.3 K, whereas the compacted bricks achieve 15%, and the temperature difference was found to be 4 K; compared with the traditional fired bricks with 2.1 K surface temperature difference. Scanning electron microscopy showed large holes and cavities in the mud and compacted bricks. Whereas, in the fired clay brick small holes were observed; this difference in structure is hypothesized to lead to the difference in the thermal behavior of the bricks. The thermal conductivity(U), of the unfired mud-brick, was 0.27 W/m.K, U =0.32 W/m.K for compacted soil brick while burned bricks U=0.6 W/m.K. Based on the results, the combinations of rice husk as a waste material, mud, and compacted soil for brick lead to reducing cooling needs and sustainable building materials for new buildings in the hot and dry climate in Egypt .
本研究旨在分析天然材料和废弃材料应用于住宅墙体砌砖时对住宅室内温度和热舒适的影响。在这项研究中，小规模的住宅房间是在埃及炎热的天气期间建造的。将模型与传统烧制粘土砖的参考模型进行了比较。结果表明:在舒适范围内，泥砖的热性能提高了25%，表面温差可达4.3 K，而压实砖的热性能提高了15%，表面温差为4 K;与传统烧结砖相比，表面温度差为2.1 K。扫描电子显微镜显示，泥土和压实的砖块中有大洞和空洞。而烧制后的粘土砖则有小孔;这种结构上的差异被假设为导致砖的热行为的差异。未烧制泥砖的导热系数U为0.27 W/m。K, U =0.32 W/m。K为密实土砖，烧结砖U=0.6 W/m.K。根据研究结果，稻壳作为废料、泥浆和压实土的组合可以减少冷却需求，并为埃及炎热干燥的气候下的新建筑提供可持续的建筑材料。
{"title":"An empirical study on the thermal behavior of rice husk in eco-friendly brick for external walls of buildings","authors":"C. Hanna, A. Aly, S. Shebl, Amr E. M. Abdallah","doi":"10.21608/jesaun.2022.141836.1144","DOIUrl":"https://doi.org/10.21608/jesaun.2022.141836.1144","url":null,"abstract":"This study aims to analyze the behavior of natural and waste materials when applied to building brick for walls of residential buildings on the indoor temperatures and thermal comfort of residential buildings. In this study, small-scale residential rooms were built during a period of hot weather in Egypt. A comparison between models and a reference model using the traditional burned clay brick was conducted. The results indicate that the mud-brick leads to enhanced thermal behavior by 25% within comfort limits and the surface temperature difference could reach 4.3 K, whereas the compacted bricks achieve 15%, and the temperature difference was found to be 4 K; compared with the traditional fired bricks with 2.1 K surface temperature difference. Scanning electron microscopy showed large holes and cavities in the mud and compacted bricks. Whereas, in the fired clay brick small holes were observed; this difference in structure is hypothesized to lead to the difference in the thermal behavior of the bricks. The thermal conductivity(U), of the unfired mud-brick, was 0.27 W/m.K, U =0.32 W/m.K for compacted soil brick while burned bricks U=0.6 W/m.K. Based on the results, the combinations of rice husk as a waste material, mud, and compacted soil for brick lead to reducing cooling needs and sustainable building materials for new buildings in the hot and dry climate in Egypt .","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131289984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-17DOI: 10.21608/jesaun.2022.143767.1148
M. El-Zoklah, T. Refaat
{"title":"The Vertical Greening Envelope and its Effect on Energy Consumption Efficiency in a Residential Building, Case Study: Twin House, 6th of October City","authors":"M. El-Zoklah, T. Refaat","doi":"10.21608/jesaun.2022.143767.1148","DOIUrl":"https://doi.org/10.21608/jesaun.2022.143767.1148","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125507041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-15DOI: 10.21608/jesaun.2022.139209.1138
H. Soliman, سمر احمد
{"title":"Predictive model on architectural design optimization for minimizing construction cost with design constraints","authors":"H. Soliman, سمر احمد","doi":"10.21608/jesaun.2022.139209.1138","DOIUrl":"https://doi.org/10.21608/jesaun.2022.139209.1138","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130726068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.21608/jesaun.2022.136177.1134
Muteb Alayafi, أحمد مصطفى
{"title":"اتجاهات وتحديات تقنيات الواجهات الذکية بالمباني وواقع تطبيقها بالمملکة العربية السعودية (مدينة الرياض نموذجاً)","authors":"Muteb Alayafi, أحمد مصطفى","doi":"10.21608/jesaun.2022.136177.1134","DOIUrl":"https://doi.org/10.21608/jesaun.2022.136177.1134","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129149075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.21608/jesaun.2022.141888.1145
Ahmed Arafa, Norhan Khalid, O. Farghal, Abdel-Rahman Ahmed
One of the construction industry’s main interests is using innovative materials to facilitate construction, extend service life, and minimize maintenance and rehabilitation costs. Recycling waste tire rubbers into conventional concrete materials constitutes one of the biggest and challenging issues in modern concrete technology, which can significantly relieve critical environmental issues. However, the compressive strength reduction caused by the added rubber aggregates, albeit with significant ductility enhancement, has limited its application in concrete structures. The present study aimed at attaining the optimum ratio of crumb rubber with minimal reduction in compressive strength to be used in large scale elements in which the ductility constitutes a critical design parameter. Different rubberized concrete mixes with different percentages of crumb rubber (CR) and different treatment were investigated. The main parameters were the type of crumb rubber (course or fine), the percentage of replacement (5%, 10%, 20%, and 30%), the treatment conditions (treated with NAOH, or without treatment), and using silica fume as partial replacement of cement. The test data were analyzed considering the workability, the compressive, tensile, and flexural strengths. The results revealed that the most appropriate concrete mix is using a 20% treated fine crumb rubber, with silica fume incorporation.
{"title":"EXPERIMENTAL CHARACTERISTICS OF RUBBERIZED CONCRETE","authors":"Ahmed Arafa, Norhan Khalid, O. Farghal, Abdel-Rahman Ahmed","doi":"10.21608/jesaun.2022.141888.1145","DOIUrl":"https://doi.org/10.21608/jesaun.2022.141888.1145","url":null,"abstract":"One of the construction industry’s main interests is using innovative materials to facilitate construction, extend service life, and minimize maintenance and rehabilitation costs. Recycling waste tire rubbers into conventional concrete materials constitutes one of the biggest and challenging issues in modern concrete technology, which can significantly relieve critical environmental issues. However, the compressive strength reduction caused by the added rubber aggregates, albeit with significant ductility enhancement, has limited its application in concrete structures. The present study aimed at attaining the optimum ratio of crumb rubber with minimal reduction in compressive strength to be used in large scale elements in which the ductility constitutes a critical design parameter. Different rubberized concrete mixes with different percentages of crumb rubber (CR) and different treatment were investigated. The main parameters were the type of crumb rubber (course or fine), the percentage of replacement (5%, 10%, 20%, and 30%), the treatment conditions (treated with NAOH, or without treatment), and using silica fume as partial replacement of cement. The test data were analyzed considering the workability, the compressive, tensile, and flexural strengths. The results revealed that the most appropriate concrete mix is using a 20% treated fine crumb rubber, with silica fume incorporation.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"504 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116697747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-20DOI: 10.21608/jesaun.2022.123912.1120
Ingy M. Naguib, Mohamed M. Elfakharany
{"title":"MUTUAL IMPACT BETWEEN BUILDING FORM AND STRUCTURE","authors":"Ingy M. Naguib, Mohamed M. Elfakharany","doi":"10.21608/jesaun.2022.123912.1120","DOIUrl":"https://doi.org/10.21608/jesaun.2022.123912.1120","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115334279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-03DOI: 10.21608/jesaun.2022.132901.1127
Hossameldeen Mohamed, Ghada Elyamany
During earthquakes’ excitation, adjacent buildings start vibrating out of phase (in different directions) leading to collisions with each other causing severe damage in a phenomenon known as structural pounding. The proposed study analyses the pounding effects for several case studies representing one of the critical pounding configurations found in the Egyptian buildings taxonomy which is building at the end-of-row of buildings. The multi-strip analysis approach (MSA) using fiftyground motion records has been adopted to reduce the computational effort required for probabilistic performance assessment. The obtained structural performances of the studied cases, expressed in the form of fragility functions, were compared with the corresponding reference cases (i.e., structures with no adjacent buildings). The results provide insights into the type of failure mechanism that contributes to the global collapse of the studied cases. Fragility functions are also developed for different limit states based on these results to extract further conclusions regarding the overall influence of pounding. Results highlight the main differences between the expected performance of the poundinginvolved cases compared to the reference cases. Finally, results indicate the relevance of the pounding effect on the overall performance of the considered cases therefore large-scale seismic risk assessment studies should consider fragility functions accounting for different pounding configurations.
{"title":"Assessment of seismic vulnerability of RC frames at the end-of-row of buildings with floor-to-floor alignment using multi-strips analysis MSA","authors":"Hossameldeen Mohamed, Ghada Elyamany","doi":"10.21608/jesaun.2022.132901.1127","DOIUrl":"https://doi.org/10.21608/jesaun.2022.132901.1127","url":null,"abstract":"During earthquakes’ excitation, adjacent buildings start vibrating out of phase (in different directions) leading to collisions with each other causing severe damage in a phenomenon known as structural pounding. The proposed study analyses the pounding effects for several case studies representing one of the critical pounding configurations found in the Egyptian buildings taxonomy which is building at the end-of-row of buildings. The multi-strip analysis approach (MSA) using fiftyground motion records has been adopted to reduce the computational effort required for probabilistic performance assessment. The obtained structural performances of the studied cases, expressed in the form of fragility functions, were compared with the corresponding reference cases (i.e., structures with no adjacent buildings). The results provide insights into the type of failure mechanism that contributes to the global collapse of the studied cases. Fragility functions are also developed for different limit states based on these results to extract further conclusions regarding the overall influence of pounding. Results highlight the main differences between the expected performance of the poundinginvolved cases compared to the reference cases. Finally, results indicate the relevance of the pounding effect on the overall performance of the considered cases therefore large-scale seismic risk assessment studies should consider fragility functions accounting for different pounding configurations.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124218936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-24DOI: 10.21608/jesaun.2022.122549.1119
Y. Gamal
{"title":"Using bracing systems to improve the seismic performance of moment resisting frame","authors":"Y. Gamal","doi":"10.21608/jesaun.2022.122549.1119","DOIUrl":"https://doi.org/10.21608/jesaun.2022.122549.1119","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115809579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：