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Shear capacity behavior of Reinforced Concrete (RC) beams strengthened with CFRP strips 碳纤维布加固钢筋混凝土梁的抗剪性能
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/j.rimni.2021.08.001
Y. Tian, S. Jiang, J. Meng, G. Shi, B. Zhang, S. Chen, W. Khan
{"title":"Shear capacity behavior of Reinforced Concrete (RC) beams strengthened with CFRP strips","authors":"Y. Tian, S. Jiang, J. Meng, G. Shi, B. Zhang, S. Chen, W. Khan","doi":"10.23967/j.rimni.2021.08.001","DOIUrl":"https://doi.org/10.23967/j.rimni.2021.08.001","url":null,"abstract":"Recently, reinforced concrete beams strengthened with carbon fiber reinforced polymers (CFRP) have been widespread. The objective of this research is to calculate the shear strength capacity increment of reinforced concrete beams strengthened by CFRP strips. The ABAQUS software was used to construct a model of the finite elements for beam simulation. Six beams were generated in ABAQUS software, two were control beams and the remaining four were reinforced by varying CFRP strips. All beams had the same rectangular cross-section geometry and length. The obtain results showed that CFRP can significantly increase the shear capacity of the beam. And the highest load and deflection is a little affected by the CFRP strips orientation. This study can proposes a more economical way for existing structures to improve the carrying capacity.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68781439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Implementing virtual laboratories: Remote teaching of electrical machines 虚拟实验室的实现:电机远程教学
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/j.rimni.2021.10.002
J. Ramirez, S. Tellez, S. Rivera
{"title":"Implementing virtual laboratories: Remote teaching of electrical machines","authors":"J. Ramirez, S. Tellez, S. Rivera","doi":"10.23967/j.rimni.2021.10.002","DOIUrl":"https://doi.org/10.23967/j.rimni.2021.10.002","url":null,"abstract":"One of the fundamental requirements of engineering education is laboratory work and practical teaching. The main purpose of the laboratory is to provide a space for students to carry out practices that allow them to check the theory learned in the classroom, validate hypotheses, propose solutions and recommendations, develop critical thinking skills and develop soft skills. The provision of laboratory work to engineering students helps them familiarize themselves with similar situations as they will find real life as they practice their profession. Primarily, this laboratory work is based on actual hardware and a laboratory where the students can work at a specified time, perform experiments under the guidance of a lab technician and leave with data that they can analyze later using the knowledge they learned in class. These laboratories and the hardware equipment in them are expensive to acquire and maintain. Also, they are an expensive upgrade, yet upgrading is inevitable with the rapid change in technology we are all experiencing. Various institutions have been forced to use outdated laboratory hardware or do with minimal hardware for performing engineering experiments. However, the rapid increase in technology that is contributing to the problem can be used to solve it by having a suitable front-end design in computers that can be used to simulate experiments.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68781461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effects of surging and heaving movements of platform on mechanical behaviors of SCT installation pipe 平台起伏运动对SCT安装管力学性能的影响
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/j.rimni.2020.12.003
F. Wang, N. Chen, Q. Yang, X. Ji
{"title":"Effects of surging and heaving movements of platform on mechanical behaviors of SCT installation pipe","authors":"F. Wang, N. Chen, Q. Yang, X. Ji","doi":"10.23967/j.rimni.2020.12.003","DOIUrl":"https://doi.org/10.23967/j.rimni.2020.12.003","url":null,"abstract":"The effects of surging and heaving movements of installation platform on mechanical behaviors of SCT installation pipe was studied. Movements of SCT installation platform, ocean wave and current, water depth, SCT weight, installation pipe specification and those dominate the mechanical behaviors of installation pipe and SCT installation precision were considered. The results indicate that surging movement of the platform is the main factor that dominate the deformation of the installation pipe. The surging and heaving movements have significant effect on the tension force loaded on the installation pipe and thus need to be considered when designing SCT installation.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"53 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91013559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Lateral buckling of steel beams. Compared analysis of CTE DB SE-A, EAE and EC3 codes 钢梁的侧向屈曲。CTE DB SE-A、EAE和EC3代码的比较分析
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/J.RIMNI.2021.03.001
A. Guardiola-Víllora, A. Pérez-García, A. Pérez
{"title":"Lateral buckling of steel beams. Compared analysis of CTE DB SE-A, EAE and EC3 codes","authors":"A. Guardiola-Víllora, A. Pérez-García, A. Pérez","doi":"10.23967/J.RIMNI.2021.03.001","DOIUrl":"https://doi.org/10.23967/J.RIMNI.2021.03.001","url":null,"abstract":"The Basic Document, Structural Safety, Steel of the Spanish Technical Building Code provides mathematical expressions to obtain the lateral buckling resistance of hot-rolled steel beams. These expressions include a coefficient, {displaystyle C_{1}}, that accounts for variation of the bending moment along the beam. However, this document only provides values for linear diagrams of bending moments. The instruction for Structural Steel, a copy of the latest version of Eurocode 3, does not include any method to obtain the elastic critical moment. On the contrary, a table with correction factors applicable to different types of bending moments diagrams is included. In this document both procedures have been combined and results have been compared to those obtained using other versions of the Eurocode 3. Finally, tables have been provided to ease the design of hot-rolled steel beams while preventing the lateral buckling.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"175 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75302478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The dynamic characteristics of backfill made of mining waste at one-dimensional dynamic and static loading 一维动、静载荷作用下采矿矸石充填体的动态特性研究
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/J.RIMNI.2021.04.002
X. Yang, Y. Zhang
{"title":"The dynamic characteristics of backfill made of mining waste at one-dimensional dynamic and static loading","authors":"X. Yang, Y. Zhang","doi":"10.23967/J.RIMNI.2021.04.002","DOIUrl":"https://doi.org/10.23967/J.RIMNI.2021.04.002","url":null,"abstract":"","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"18 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73860660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The volatility of natural gas prices - Structural shocks and influencing factors 天然气价格波动——结构性冲击及其影响因素
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/j.rimni.2021.12.002
L. Stajić, B. Đorđević, S. Ilic, D. Brkić
{"title":"The volatility of natural gas prices - Structural shocks and influencing factors","authors":"L. Stajić, B. Đorđević, S. Ilic, D. Brkić","doi":"10.23967/j.rimni.2021.12.002","DOIUrl":"https://doi.org/10.23967/j.rimni.2021.12.002","url":null,"abstract":"The paper examines the primary drivers and factors influencing the volatility of natural gas prices in the world from January 2007 to July 2020. In addition to the narrow dependence between crude oil and natural gas prices, the influence of renewable energy production and coal production on the price of natural gas has been studied. For that purpose, the method of multiple linear regression was used. The results show that the volatility of natural gas prices significantly depends on the type of the shock in the natural gas market, and that the total production of energy from renewable sources, production of coal and natural gas and the price of crude oil have a significant impact on the price of gas.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68781107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The erosion wear mechanism of liquid-solid two-phase high pressure manifold tee pipes 液固两相高压歧管三通管冲蚀磨损机理研究
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/J.RIMNI.2021.04.001
H. Zhang, J. Zhang, L. Lv
{"title":"The erosion wear mechanism of liquid-solid two-phase high pressure manifold tee pipes","authors":"H. Zhang, J. Zhang, L. Lv","doi":"10.23967/J.RIMNI.2021.04.001","DOIUrl":"https://doi.org/10.23967/J.RIMNI.2021.04.001","url":null,"abstract":"The wall thickness of pressure pipe is often thinned due to the erosion wear, which leads to pipe failure and even safety accidents. In particular, the tee pipe is more prone to be erosive as a key component of transferring fluid with particles. Therefore, the erosion wear mechanism of high pressure manifold tee pipe based on liquid-solid two-phase flow is studied in this paper. Firstly, the standard tee pipe geometry model is established and the grid is divided. And then grid number independence is verified by the percentage difference. According to the structural characteristics of tee pipe, the wear of the inner wall under four different port combinations is predicted. In addition, the relationship between erosion rate and wall shear stress is further analyzed by fluid velocity, particle diameter and mass flow rate. Double tee pipes geometry model was established to explore the erosion wear on the inner walls. The effects of assembly length and different port combinations on erosion wear were discussed respectively. When the inlets are fixed, the wall shear stress distribution of the downstream tee pipe is mainly affected by the outlets. The assembly length mainly affects the erosion rate of the downstream tee pipe.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"11 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74404570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
No-wait open shop with worker flexibility 无需等待的开放车间，工人的灵活性
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/J.RIMNI.2021.04.005
M. B. D. Nascimento, C. Scarpin
{"title":"No-wait open shop with worker flexibility","authors":"M. B. D. Nascimento, C. Scarpin","doi":"10.23967/J.RIMNI.2021.04.005","DOIUrl":"https://doi.org/10.23967/J.RIMNI.2021.04.005","url":null,"abstract":"The Open Shop Problem is a Production Scheduling problem where jobs do not have predestined processing routes, which increases the solution space and, therefore, the complexity of the problem. This work proposes a novel mathematical model that addresses the Open Shop theme with worker flexibility and no-wait. We consider the resource constraint of flexible and multiskilled labor. That is, the workers can execute their activities in more than one workstation. Simultaneously, the latter the continued production is contemplated, which hinders the reachability of feasible solutions and therefore increases the problem complexity. To validate the model, we generate several benchmarks, and the results obtained highlight the importance of worker flexibility in achieving greater problem feasibility.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"46 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88878138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal behavior characterization for MOSFETs and BJTs in hazardous locations 危险场所中mosfet和bjt的热行为表征
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/J.RIMNI.2021.03.002
D. Cárdenas, J. Delgado
{"title":"Thermal behavior characterization for MOSFETs and BJTs in hazardous locations","authors":"D. Cárdenas, J. Delgado","doi":"10.23967/J.RIMNI.2021.03.002","DOIUrl":"https://doi.org/10.23967/J.RIMNI.2021.03.002","url":null,"abstract":"Este artículo muestra una aproximación polinomial numérica al tema de cómo los transistores de unión bipolar (BJT) y los transistores de efecto de campo (FET) pueden resultar seguros o inseguros cuando funcionan en atmósferas explosivas. Se han analizado termográficamente los transistores más utilizados, trabajando en un entorno controlado, para caracterizar su comportamiento térmico. El objetivo es evitar que el transistor propicie condiciones que logran la energía mínima de activación de vapores, polvos o fibras volátiles combustibles. Hemos llevado los transistores a sus valores nominales, especificados por corrientes y voltajes de trabajo, y confirmamos que el efecto de la disipación de calor en un transistor BJT es no lineal y mucho mayor que en un transistor tipo MOSFET. Hemos encontrado experimentalmente una diferencia térmica de más de 200°C de sobrecalentamiento de un BJT común en comparación con un MOSFET con carga similar en polarización fija. Logramos medir temperaturas superiores a los 300ºC en BJTs que operan dentro de sus rangos y condiciones nominales, cuando se supone que la temperatura “segura” aceptada no debe superar 200ºC en ningún caso. Por medio de un análisis de desempeño enfocado en la temperatura, nuestro estudio sugiere que no se deben implementar equipos con tecnologías BJT en ciertas áreas de lugares clasificados o zonas explosivas; por lo que son preferibles las tecnologías MOSFET.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"34 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78767884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Redireccionando el diseño de un juego educativo de Ingeniería Eléctrica hacia otras disciplinas 将电气工程教育游戏的设计转向其他学科
IF 0.5 4区 工程技术
Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2021-01-01 DOI: 10.23967/j.rimni.2021.10.004
J. Ramírez, S. Rivera
{"title":"Redireccionando el diseño de un juego educativo de Ingeniería Eléctrica hacia otras disciplinas","authors":"J. Ramírez, S. Rivera","doi":"10.23967/j.rimni.2021.10.004","DOIUrl":"https://doi.org/10.23967/j.rimni.2021.10.004","url":null,"abstract":"This document describes the process of developing a game that simulates the fundamental aspects of a commercial establishment in charge of marketing and performing maintenance on electric motors, aimed mainly at Electrical Engineering students. The process begins with the coding of a software capable of simulating daily machinery buying and selling events, then its design was refined, including other elements that enrich the user experience. With these elements, you can make add-ons that allow you to simulate and document events in such a way that they can be used outside of your initial target audience.","PeriodicalId":49607,"journal":{"name":"Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68781027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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