Proceedings of International Structural Engineering and Construction最新文献_第3页

DESIGNATION OF THE HEAD LOSS COEFFICIENT IN FITTINGS CFD 指定接头水头损失系数 cfd

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).aaw-05

Mireya Lapo-Pauta, Eduardo Carrión-Coronel, Cristhian Pardo

{"title":"DESIGNATION OF THE HEAD LOSS COEFFICIENT IN FITTINGS CFD","authors":"Mireya Lapo-Pauta, Eduardo Carrión-Coronel, Cristhian Pardo","doi":"10.14455/isec.2024.11(1).aaw-05","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).aaw-05","url":null,"abstract":"The optimization of pumping systems is important because it leads to an increment of improved energy efficiency. This study analyzes the hydraulic behavior of clean water through pressurized fittings which is analyzed numerically. The numerical experiment is carried out using Ansys Fluent software. The flow characterization through the fittings was performed using the coefficient of minor losses (KL). Two short radius elbows of 45° and 90°, and a PVC tee (simple) were used. The procedure used for the development of the numerical experimentation in this study is as follows: geometry construction, discretization, boundary conditions, configuration of the numerical simulation parameters, validation, CFD parametric study, and the analysis of results. The results of the flow simulation on the meshes showed a high sensitivity to the mesh size. To determine the optimal element size, a mesh independence study was performed, which consisted of refining the mesh to stable values. The numerical results were compared with values calculated using conventional equations for minor losses in the fittings. The KL values were characterized by two methods: in the first one the behavior of KL with respect to Reynolds number in turbulent flow was studied, in the second one the relative percentage of loss error was determined in comparison with previous investigations on this subject. The numerical results showed an acceptable relative error for the three simulated fittings.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"49 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140273799","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

SOLAR POWERED OFF-GRID WATER DISTRIBUTION PROJECTS: A CASE STUDY COMPARISON OF TWO COMMUNITIES 太阳能离网输水项目：两个社区的案例研究比较

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).epe-12

Lonny Simonian, Paul Redden

{"title":"SOLAR POWERED OFF-GRID WATER DISTRIBUTION PROJECTS: A CASE STUDY COMPARISON OF TWO COMMUNITIES","authors":"Lonny Simonian, Paul Redden","doi":"10.14455/isec.2024.11(1).epe-12","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).epe-12","url":null,"abstract":"This paper presents the pre-construction planning and construction installation phases of student-run projects in Ecuador and Ghana to provide fresh water via pumped water storage through photovoltaic (PV) systems. Our Ecuadorian project relied on a preliminary design prepared by a non-profit organization as the construction basis. The Ghanian project was designed by students, with faculty support. These two case studies were chosen because they had similar project goals, occurred close in time, and had the same faculty and student clubs performing the work. The fundamental project management areas of scope, schedule, and budget management were assessed as a basis for comparison. Although there were several differences between the projects, students gained new knowledge in all of these areas. The work involved several students and two faculty from California Polytechnic State University, San Luis Obispo (Cal Poly). The work included piping connections to direct current submersible pumps, water storage, distribution piping/connections to a village community center or directly to households, PV panels, and an electrical distribution system with overcurrent protection. The initial design was an important part of each project; however, many details were resolved during construction using a design-build approach.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"522 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140273859","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

INELASTIC DISPLACEMENTS MACHINE-LEARNING-BASED ESTIMATIONS FOR THE RC-BUILDINGS SEISMIC DESIGN CONSIDERING SSI EFFECTS 基于机器学习的非弹性位移估算，用于考虑 SSI 效应的 RC 建筑抗震设计

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).gfe-01

Juan-Sebastian Baquero, Gustavo Chafla Altamirano

{"title":"INELASTIC DISPLACEMENTS MACHINE-LEARNING-BASED ESTIMATIONS FOR THE RC-BUILDINGS SEISMIC DESIGN CONSIDERING SSI EFFECTS","authors":"Juan-Sebastian Baquero, Gustavo Chafla Altamirano","doi":"10.14455/isec.2024.11(1).gfe-01","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).gfe-01","url":null,"abstract":"Over the past few decades, scientists have dedicated considerable attention to investigating the impact of soil-structure interaction (SSI) on buildings’ performance. It is now widely recognized that these interaction effects can either positively or negatively influence a building's response to seismic events. Regarding the seismic design of buildings following standard prescriptions and accounting for SSI effects, ASCE 7, for example, guides through the modification process of the design forces obeying the interacting soil-structure system (SSS) behavior in an oversimplified manner. Nevertheless, no recommendations are made for adequately estimating inelastic displacements (IDs) focused on the design process. In an effort to rectify these limitations, this study examines the inelastic displacement response of ductile RC buildings while incorporating the influence of SSI. In that sense, a database of 3D-model structures with varying in-plan and elevation geometries as well as different supporting soil characteristics were generated and later assessed using OpenSeesPy as the modeling and analysis engine. Nonlinear dynamic analyses were executed accounting for flexible-base and fixed-base conditions as per ASCE 41, and their inelastic displacements are used to generate estimation models. The Gradient Boosting Regression Tree (GBRT) technique from machine learning (ML) is used in accomplishing this aim. It was observed that the wave parameter σ, along with the flexible-to-fixed base design shear force ratio, V*, are enough to explain up to 90% of the variation in IDs in the estimation model.\u0000","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"573 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281713","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

ROLE OF CRAFTSMAN APPLIED TO ARCHITECTURAL EDUCATION ANALYZED THROUGH THE CONCEPTS OF MIMESIS AND PHRONESIS: THE CASE OF DAU IV 通过 "模仿 "和 "phronesis "概念分析建筑教育中工匠的作用：Dau IV 的案例

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).aae-09

Javier Benavides, María Lorena Rodríguez

{"title":"ROLE OF CRAFTSMAN APPLIED TO ARCHITECTURAL EDUCATION ANALYZED THROUGH THE CONCEPTS OF MIMESIS AND PHRONESIS: THE CASE OF DAU IV","authors":"Javier Benavides, María Lorena Rodríguez","doi":"10.14455/isec.2024.11(1).aae-09","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).aae-09","url":null,"abstract":"Craftsmanship processes have been lost in the field of architecture due to a technophilic juncture. This situation leads to a lack of manual inputs inherent to the profession for practical application. Thus, the question arises: Is it necessary to return to artisanal practices as project inputs? This question prompts a rethinking of the methodology of the Architectural and Urban Design Workshop IV (DAU IV) at PUCE FADA, shifting towards an analysis of the cultural, vernacular and technical context. This initial section seeks to understand the reality of tectonic culture of the place through observation and experience. Subsequently, with the mimesis as a process of rationalization, the observational exercise is put into practice through exercises in material and tectonic exploration, with the aim of reclaiming the role of the artisan. Thus, the formation of the artisan lies in developing skills for mastery of the craft, phronesis, through direct experience in workshops and laboratories that involve the use of their senses for the understanding of different materials. The expected outcome is the direct application of this learning in the development of an academic architectural project.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"29 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140283312","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

TESTING PHRAGMITES AUSTRALIS FOR DOUBLE CURVATURE DEPLOYABLE STRUCTURES 为双曲率可展开结构测试葭藻

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).aae-08

César Gabriel Ferro, María Mercedes Andrade

{"title":"TESTING PHRAGMITES AUSTRALIS FOR DOUBLE CURVATURE DEPLOYABLE STRUCTURES","authors":"César Gabriel Ferro, María Mercedes Andrade","doi":"10.14455/isec.2024.11(1).aae-08","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).aae-08","url":null,"abstract":"Felix Escrig’s cover for the San Pablo Swimming Pool in Seville is one of the few examples of an actual application of a biaxial mesh of pantographs in Architecture. A structure that can contain space, easily transforming from a planar surface into a double curvature one, is rarely used as a solution to cover grand areas. In addition, most deployable structures use industrialized components with almost negligible dimensional variations. Analyzing Escrig’s structure with help from both physical and digital models, it is possible to understand its mechanical behavior and the changes in mesh morphology during the deployment process. These models showed how the biaxial mesh suffered some important angular deformations due to the rods and nodes adapting to the double-curvature shape during deployment, resulting in rod and node fatigue, which needed to be addressed before adapting the geometry to a heterogeneous material. This paper describes the geometric implications of using common reed (Phragmites australis) in the construction of double curvature deployable structures, examining the behavior of this heterogeneous material if employed on the manufacture of both rods and nodes. Using a scale model built from an adapted design, the geometry of the reed structure was tested. The heterogeneity of the reed required a redesign of the pivots of the blades and the nodes. This redesign showed that it is possible to use common reed for the construction of deployable double-curvature structures if certain mechanical design considerations, detailed as guidelines in this paper, are observed.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"31 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140269021","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

VERNACULAR AND ENDOGENOUS PARAMETERS: REVISION OF THE MACHUPICCHU WALL AND THE ECOEARTH SANDWICH SYSTEM 本地和本地参数：马丘皮丘城墙和生态土夹层系统的修订

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).epe-03

E. Villacis, C. Ayarza, Julio Gutierrez

引用次数: 0

PROMOTION INVESTMENT EVOLUTION OF CONSTRUCTION REAL ESTATE PROJECTS 促进建筑房地产项目的投资演变

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).cpm-03

Miguel Andrés Andrés Guerra, Steban Hidalgo, Freddy Miño, Cristian Yanouch, Steve Calahorrano, GIOVANNA RODRIGUEZ

{"title":"PROMOTION INVESTMENT EVOLUTION OF CONSTRUCTION REAL ESTATE PROJECTS","authors":"Miguel Andrés Andrés Guerra, Steban Hidalgo, Freddy Miño, Cristian Yanouch, Steve Calahorrano, GIOVANNA RODRIGUEZ","doi":"10.14455/isec.2024.11(1).cpm-03","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).cpm-03","url":null,"abstract":"The success of real estate projects is not only related to the quality of the product but also to the commercial strategy and understanding how to manage resources and distribute them properly such that the information arrives to the interested audience. The purpose of this study is to determine the evolution of the promotion investment for real estate projects located in Quito, Ecuador throughout the last 20 years. For this, researchers collected commercial and general variables for 339 real estate business plans for projects that were built between 2005 and 2021. The information was recorded in a matrix and then analyzed to identify correlations and trends between the variables. Projects were classified by their type of construction, size, and socioeconomic level, and the percentage of investment in advertising for each of them was identified. The paper shows the evolution of the investment distribution according to different types of advertising avenues and projects. Practitioners can use the results as a guide to develop promotion strategy in order to invest promotion resources in a real estate project and predict its commercial performance.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"31 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140280562","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

AUTOMATION IN CONSTRUCTION: EDUCATION AND TRAINING FOR WORKFORCE DEVELOPMENT 建筑业自动化：劳动力发展的教育和培训

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).con-12

Mohammad Ilbeigi, Xi Chen

{"title":"AUTOMATION IN CONSTRUCTION: EDUCATION AND TRAINING FOR WORKFORCE DEVELOPMENT","authors":"Mohammad Ilbeigi, Xi Chen","doi":"10.14455/isec.2024.11(1).con-12","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).con-12","url":null,"abstract":"The construction industry's 4th industrial revolution is transforming the nature of work for construction professionals and pushing them to gain new qualifications in terms of skills, knowledge, and abilities. Educational and training programs play a vital role in workforce development during this rapidly evolving transition. Although the construction research community has paid increasing attention to better understanding the emerging needs for education and training, there is still little knowledge about the design of novel educational and training approaches to overcome the unprecedented challenges during the automation era. The first step toward directing future research and investments in this domain is to systematically understand the scope of the present knowledge and identify the knowledge gaps that form the foundations for future research directions. This research fulfills this requirement by undertaking a scoping review utilizing the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Review (PRISMA-ScR) guidelines. The extracted information from the identified relevant studies was synthesized and mapped using a well-established framework. Using the outcomes of the systematic scoping review and its synthesis process, a series of knowledge gaps and potential directions for future research and scholarly works were identified and discussed.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"248 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140282055","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

SUSTAINABLE URBAN ARCHITECTURAL REHABILITATION OF AIRPORT INFRASTRUCTURES 机场基础设施的可持续城市建筑改造

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).aae-07

Christine De Franca Van Sluys, Esteban Nicolás Jaramillo Serrano

{"title":"SUSTAINABLE URBAN ARCHITECTURAL REHABILITATION OF AIRPORT INFRASTRUCTURES","authors":"Christine De Franca Van Sluys, Esteban Nicolás Jaramillo Serrano","doi":"10.14455/isec.2024.11(1).aae-07","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).aae-07","url":null,"abstract":"This paper presents a proposal for the sustainable urban-architectural rehabilitation of the former Quito airport building in Ecuador. The research focuses on exploring the implementation of nature-based solutions to optimize environmental performance and mitigate the impacts of climate change at the urban scale. Additionally, sustainable, and bioclimatic design strategies are investigated to enhance energy efficiency and resource consumption at the architectural scale. A notable aspect of the rehabilitation of the existing building is the use of glued laminated timber as the main material. This construction system has become an increasingly popular solution due to its technical, aesthetic, and environmental advantages, positioning it as a sustainable alternative capable of significantly reducing carbon emissions associated with construction. This approach not only enables the conversion of an obsolete urban area but also contributes to the preservation of important architectural heritage, making this proposal a flagship project in the responsible use of renewable natural resources in the construction industry.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"70 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140276521","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

STRENGTH DEVELOPMENT IN CLAY-STABILIZED BRICKS WITH CEMENT AND RICE BY-PRODUCTS 使用水泥和大米副产品的粘土稳定砖的强度发展

Proceedings of International Structural Engineering and Construction Pub Date : 2024-03-01 DOI: 10.14455/isec.2024.11(1).sus-13

Adriana Camacho, María Mena, Jorge Albuja-Sánchez, Dana Cruz, Mariela Anaguano-Marcillo

{"title":"STRENGTH DEVELOPMENT IN CLAY-STABILIZED BRICKS WITH CEMENT AND RICE BY-PRODUCTS","authors":"Adriana Camacho, María Mena, Jorge Albuja-Sánchez, Dana Cruz, Mariela Anaguano-Marcillo","doi":"10.14455/isec.2024.11(1).sus-13","DOIUrl":"https://doi.org/10.14455/isec.2024.11(1).sus-13","url":null,"abstract":"Bricks, traditionally used in the construction sector, use high energy and generate significant emissions of CO2 in their production process. As a result, as a lower-impact and low-cost alternative, this study analyzed different types of mixtures of soil, cement, rice husk, and rice husk ash to decrease the amount of cement, which was substituted gradually with rice husk and rice husk ash, to stabilize and improve the characteristics of clay, and to compare the effectiveness of earth stabilized bricks respect to traditional bricks. The research was carried out in three phases which were soil-cement, soil-cement-rice husk ash, and soil-cement-rice husk ash-rice husk, from which we concluded the best mixture consists in low-plasticity clay soil (CL), 14% Portland cement, 6% rice husk ash, and 4% rice husk, which in the simple compressive strength after 7 days of curing is not affected by the decrease in cement but increases by 0.41 MPa, which in addition shows better results in simple compression, absorption, and flexure tests than traditional bricks.","PeriodicalId":477265,"journal":{"name":"Proceedings of International Structural Engineering and Construction","volume":"522 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281754","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