JES. Journal of Engineering Sciences最新文献_第8页

A new approach to determine the flood hazard impact on road network using 3D city model 利用三维城市模型确定洪水灾害对道路网络影响的新方法

JES. Journal of Engineering Sciences Pub Date : 2022-07-31 DOI: 10.21608/jesaun.2022.140556.1140

R. Khalil

{"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}

引用次数: 0

المجتمعات العمرانية الجديدة المستدامة بين النظرية والتطبيق (دراسة تحليلية) 理论与实践之间可持续的新城市化社会(分析)

JES. Journal of Engineering Sciences Pub Date : 2022-07-27 DOI: 10.21608/jesaun.2022.141645.1146

Aya Salah

引用次数: 0

An empirical study on the thermal behavior of rice husk in eco-friendly brick for external walls of buildings 建筑外墙环保砖中稻壳热性能的实证研究

JES. Journal of Engineering Sciences Pub Date : 2022-07-26 DOI: 10.21608/jesaun.2022.141836.1144

C. Hanna, A. Aly, S. Shebl, Amr E. M. Abdallah

{"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}

引用次数: 1

The Vertical Greening Envelope and its Effect on Energy Consumption Efficiency in a Residential Building, Case Study: Twin House, 6th of October City 住宅建筑垂直绿化围护结构及其对能耗效率的影响，以Twin House为例，10月6日

JES. Journal of Engineering Sciences Pub Date : 2022-07-17 DOI: 10.21608/jesaun.2022.143767.1148

M. El-Zoklah, T. Refaat

引用次数: 0

Predictive model on architectural design optimization for minimizing construction cost with design constraints 考虑设计约束的建筑设计优化预测模型

JES. Journal of Engineering Sciences Pub Date : 2022-07-15 DOI: 10.21608/jesaun.2022.139209.1138

H. Soliman, سمر احمد

引用次数: 0

اتجاهات وتحديات تقنيات الواجهات الذکية بالمباني وواقع تطبيقها بالمملکة العربية السعودية (مدينة الرياض نموذجاً) 沙特阿拉伯王国(利雅得市)应用建筑物防护技术的趋势和挑战

JES. Journal of Engineering Sciences Pub Date : 2022-07-08 DOI: 10.21608/jesaun.2022.136177.1134

Muteb Alayafi, أحمد مصطفى

引用次数: 0

EXPERIMENTAL CHARACTERISTICS OF RUBBERIZED CONCRETE 橡胶混凝土的试验特性

JES. Journal of Engineering Sciences Pub Date : 2022-07-01 DOI: 10.21608/jesaun.2022.141888.1145

Ahmed Arafa, Norhan Khalid, O. Farghal, Abdel-Rahman Ahmed

{"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}

引用次数: 0

MUTUAL IMPACT BETWEEN BUILDING FORM AND STRUCTURE 建筑形式与结构之间的相互影响

JES. Journal of Engineering Sciences Pub Date : 2022-06-20 DOI: 10.21608/jesaun.2022.123912.1120

Ingy M. Naguib, Mohamed M. Elfakharany

引用次数: 1

Assessment of seismic vulnerability of RC frames at the end-of-row of buildings with floor-to-floor alignment using multi-strips analysis MSA 采用多条形分析MSA评价层对层排列建筑尾排钢筋混凝土框架的地震易损性

JES. Journal of Engineering Sciences Pub Date : 2022-06-03 DOI: 10.21608/jesaun.2022.132901.1127

Hossameldeen Mohamed, Ghada Elyamany

{"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}

引用次数: 0

Using bracing systems to improve the seismic performance of moment resisting frame 采用支撑体系提高抗弯矩框架的抗震性能

JES. Journal of Engineering Sciences Pub Date : 2022-05-24 DOI: 10.21608/jesaun.2022.122549.1119

Y. Gamal

引用次数: 1