Journal of Engineering Issues and Solutions最新文献_第3页

Power quality monitoring and analysis of aerodrome supply system: A study in Gautam Buddha International Airport, Nepal 机场供电系统电能质量监测与分析——以尼泊尔高塔姆佛国际机场为例

Journal of Engineering Issues and Solutions Pub Date : 2023-06-06 DOI: 10.3126/joeis.v2i1.49481

B. Neupane

{"title":"Power quality monitoring and analysis of aerodrome supply system: A study in Gautam Buddha International Airport, Nepal","authors":"B. Neupane","doi":"10.3126/joeis.v2i1.49481","DOIUrl":"https://doi.org/10.3126/joeis.v2i1.49481","url":null,"abstract":"The power supply system may contain disturbances leading to variations in voltage and frequency from their nominal value, non-sinusoidal waveform injection, presence of negative and zero sequence components, etc. Power quality is a measure of characteristic disturbances present in the power supply which ensures the importance of quality of service and consumer requirements. Electrical equipment installed in an aerodrome is more sensitive and prone to disturbance present at the power supply end. This study provides results of a theoretical power flow study, power quality monitoring, quality analysis, and probable remedies for power quality issues in an aerodrome electrical supply system in Nepal. Power quality measurement for supply from the utility here, Nepal Electricity Authority, and internal power generations in Gautam Buddha International Airport (GBIA) Siddharthanagar, Rupandehi, Nepal is performed by using theoretical load flow approach and continuous monitoring using a power data analyzer. The scope and origin of various disturbances which may induce power quality issues are analyzed. It is observed that the power supply at GBIA has voltage fluctuations of about ±12% and total voltage harmonic distortion of 6.5% with the presence of negative and zero sequence components. A remedial solution for the power quality problem is proposed for future enhancement of the electrical supply system at GBIA.","PeriodicalId":111997,"journal":{"name":"Journal of Engineering Issues and Solutions","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131946673","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

An assessment of aggregate quality from crusher plant as construction material used in Kaski district of Nepal 尼泊尔卡斯基地区破碎机厂作为建筑材料的骨料质量评价

Journal of Engineering Issues and Solutions Pub Date : 2023-06-06 DOI: 10.3126/joeis.v2i1.49471

Ramesh Banstola, Santos Gc

{"title":"An assessment of aggregate quality from crusher plant as construction material used in Kaski district of Nepal","authors":"Ramesh Banstola, Santos Gc","doi":"10.3126/joeis.v2i1.49471","DOIUrl":"https://doi.org/10.3126/joeis.v2i1.49471","url":null,"abstract":"Quality refers to the minimum acceptable physical dimensional characteristics as specified in the form of a specification. Quality improvements are essential for any crusher plant or entrepreneur to stay in operation in a competitive business. Aggregates have a significant relation with the strength of the various grades of concrete to optimize the quality and obtain the specific result on the strength of concrete. The aggregate properties play significant role to enhance quality of concrete and its durability. Among various properties of the aggregate, only physical and mechanical properties of coarse and fine aggregates were tested and evaluated. Results showed that coarse and fine aggregates of the crusher plants A, B, and C lie within the specifications defined by standard specifications for road and bridge works - 2073 (with second amendment 2078) of Department of Roads (DoR), Nepal, and the plants of D, E, F, G, H, I, and J does not comply with the standard. The physical and mechanical properties of aggregates complying with the standard help gain strength, durability, and other properties of concrete in concrete mix design.","PeriodicalId":111997,"journal":{"name":"Journal of Engineering Issues and Solutions","volume":"466 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116568344","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

Seismic fragility assessment of low-rise reinforced concrete frame: A comparative study of bare and infill model 低层钢筋混凝土框架的地震易损性评估:裸露模型与填充模型的比较研究

Journal of Engineering Issues and Solutions Pub Date : 2023-06-06 DOI: 10.3126/joeis.v2i1.49373

Rajan Suwal, Rupesh Uprety

{"title":"Seismic fragility assessment of low-rise reinforced concrete frame: A comparative study of bare and infill model","authors":"Rajan Suwal, Rupesh Uprety","doi":"10.3126/joeis.v2i1.49373","DOIUrl":"https://doi.org/10.3126/joeis.v2i1.49373","url":null,"abstract":"Most of the residential structures designed in Nepal are low-rise reinforced concrete (RC) frames. They are designed following the guidelines given in the Nepal Building Code, especially, the mandatory rule of thumb. In analyzing and designing most of the reinforced concrete structures in the urban and semi urban areas of Nepal, only bare frame model is considered. The additional effect caused by the infill walls are neglected. In this research, a comparative seismic fragility assessment of low-rise RC frame is conducted. Two cases are assumed; with and without the consideration of the unreinforced masonry infill. Macro modelling approach is followed for modelling the infill effect. Results clearly indicate that the inclusion of the infills drastically reduce the roof displacement compared to the bare frame model during a seismic shaking. This is attributed to the fact that the inclusion of the infill imparts more stiffness to the structure during a seismic-shaking compared to the bare frame model and hence the displacement is reduced. Furthermore, seismic fragility of the frame structure is also overstated when the effect of infill is not taken into consideration. The inclusion of infills reduced the structural fragility to significant extent. In this regard, the bare frame model was found to be more vulnerable to seismic shaking compared to the infill model.","PeriodicalId":111997,"journal":{"name":"Journal of Engineering Issues and Solutions","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125270448","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

Influence of structural irregularities on seismic performance of RC frame buildings 结构不规则性对钢筋混凝土框架建筑抗震性能的影响

Journal of Engineering Issues and Solutions Pub Date : 1900-01-01 DOI: 10.3126/joeis.v1i1.36820

K. Ghimire, Hemchandra Chaulagain

{"title":"Influence of structural irregularities on seismic performance of RC frame buildings","authors":"K. Ghimire, Hemchandra Chaulagain","doi":"10.3126/joeis.v1i1.36820","DOIUrl":"https://doi.org/10.3126/joeis.v1i1.36820","url":null,"abstract":"Irregular building structure is frequently constructed across the globe for fulfilling aesthetic as well as functional requirements. The structures with irregularities are the common building type in earthquake-prone country like Nepal. However, a post-earthquake reconnaissance survey reports revealed the high seismic vulnerability of the building with structural irregularities. In this context, the present study explores the influence of structural irregularities on performance of reinforced concrete (RC) frame structure. To this end, the structural irregularities are created in in the building structures. The geometrical irregularities are created by removing the bays in different floor levels. Likewise, the effect due to mass irregularities are studied by considering the swimming pool and game house at different floor levels. Furthermore, the stiffness irregularities are formulated by removing the building columns at different sections. All these irregularities are studied analytically in finite element program with 3-D structural models. The numerical analysis is done with non-linear static pushover and time history analysis. The results are analyzed in terms of fundamental time period, storey shear, storey displacement, drift and overturning moment. The results indicate that the level of irregularities significantly influenced the behavior of structures.","PeriodicalId":111997,"journal":{"name":"Journal of Engineering Issues and Solutions","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130612373","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

Assessment of the impact of COVID-19 on transportation and its inter-linked sectors of Nepal 评估2019冠状病毒病对尼泊尔交通及其相关部门的影响

Journal of Engineering Issues and Solutions Pub Date : 1900-01-01 DOI: 10.3126/joeis.v1i1.36813

Dipendra Singh, D. Sah

{"title":"Assessment of the impact of COVID-19 on transportation and its inter-linked sectors of Nepal","authors":"Dipendra Singh, D. Sah","doi":"10.3126/joeis.v1i1.36813","DOIUrl":"https://doi.org/10.3126/joeis.v1i1.36813","url":null,"abstract":"Nepal being a landlocked country is completely dependent on the roadways and airways for means of transportation however, the railway has not been started in Nepal to date. Transportation is interlinked with mobility and due to lockdown every sector related to mobility has been affected. Consequently, the aviation sector has been worst hit as airlines were prohibited to operate. The aviation industry of Nepal has foreseen significant decadence in the mobility of passengers and cargo (international and domestic) which has affected revenue generation. Similarly, the imposed lockdown has influenced the ongoing nation's pride and the long-term investment projects which have been considered as a milestone in the infrastructural development of Nepal and those projects need to be reprogrammed and reprioritized. Moreover, the sharp decrease in import of petroleum products has decreased the revenue paid to the Indian Oil Corporation (IOC) which will help to reduce trade loss. The lockdown induced due to COVID-19 has also affected the agricultural sector as the supply chain has been disrupted due to travel restrictions. The overall Gross Domestic Product (GDP) that the transport and its inter-linked sector contribute has been reduced during lockdown than the preceding years. Identifying the paucity of research in the transportation sector of Nepal this paper is focused on the comprehensive study of the impact of the COVID-19 transportation sector along with its inter-connected areas.","PeriodicalId":111997,"journal":{"name":"Journal of Engineering Issues and Solutions","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116664017","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

Design and simulation of components of vacuum forming machine using household vacuum cleaner 家用吸尘器真空成型机部件的设计与仿真

Journal of Engineering Issues and Solutions Pub Date : 1900-01-01 DOI: 10.3126/joeis.v1i1.36834

Navaraj Adhikari, Nirajan Sharma Timilsina, Sanskar Gautam, Snehraj Kaphle, Pratisthit Lal Shrestha

引用次数: 1

A comparative study of structural parameters of a RCC T-girder bridge using loading pattern from different codes 不同规范荷载模式下碾压混凝土t型梁桥结构参数的比较研究

Journal of Engineering Issues and Solutions Pub Date : 1900-01-01 DOI: 10.3126/joeis.v1i1.36818

Sulav Sigdel

{"title":"A comparative study of structural parameters of a RCC T-girder bridge using loading pattern from different codes","authors":"Sulav Sigdel","doi":"10.3126/joeis.v1i1.36818","DOIUrl":"https://doi.org/10.3126/joeis.v1i1.36818","url":null,"abstract":"Nepal is an under-developed country; it is on the threshold of becoming a developing country. With new highways and railroad projects launching, construction of bridges is likely to increase. Bridges improve connectivity across the country and provide support to the country's overall economic growth. While designing a bridge, concrete properties, reinforcement properties, superstructure and substructure sections, traffic movements and loading conditions are specified. Bridges in Nepal are designed based on criteria enumerated by Indian Road Congress (IRC) code provisions. But, there are different bridge design codes used by different countries. Although these provisions follow the same basic principles, they may yield different results. The study on various structural parameters' variation is significant while selecting the code provision for the design and analysis of the bridge. In this study, a T-Girder Bridge is considered and is modelled and analyzed by vehicular loading patterns from IRC Codal Provision, AASHTO Codal Provision, and Chinese Codal Provision. This study uses CSiBridge computer software to perform the analysis.","PeriodicalId":111997,"journal":{"name":"Journal of Engineering Issues and Solutions","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114817057","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