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  • 201.
    Törnqvist, Joacim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Ändhållplatsladdning av elbussar: En fallstudie av två stadsbusslinjer i Uppsala2019Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This thesis investigates the charging power and battery capacity needed for fast charging of fully electrical busses at end stations in Uppsala, Sweden. The operator, UL, wants to implement electrical busses by 2020 and a new depot for the city buses is being built with possibility to slow-charge the busses overnight. However, due to restrictions in the transmission grid the requested grid connection was denied by Vattenfall Eldistribution. Simulations in this thesis is based on the existing bus schedules for city bus route 6 and route 8 in Uppsala. The routes were selected by UL as suitable candidates for fast charging at end stations. Simulations were made with varying charging power, battery capacity and energy usage by the buses. A worst case-scenario was simulated to ensure that the solution would work even in bad weather conditions. The results show that it is possible to dimension the battery to match the current time schedule. The battery capacity needed depends on charging power, length of route and time available for charging. With 300 kW charging power, the battery capacity needed to manage the bus schedule during weekends were higher than during weekdays. Furthermore, the needed battery capacity for weekends on route 8 were significantly higher than for route 6. If the whole bus fleet would be electrified, the choice of charging technique and battery size depends on the routes and passenger capacity needed. A combination of different charging techniques may be the most efficient solutions when the whole bus fleet is considered.

  • 202.
    van Dijk, Nico P.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Formulation and implementation of stress-driven and/or strain-driven computational homogenization for finite strain2016Ingår i: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 107, nr 12, s. 1009-1028Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this paper, we present a homogenization approach that can be used in the geometrically nonlinear regime for stress-driven and strain-driven homogenization and even a combination of both. Special attention is paid to the straightforward implementation in combination with the finite-element method. The formulation follows directly from the principle of virtual work, the periodic boundary conditions, and the Hill-Mandel principle of macro-homogeneity. The periodic boundary conditions are implemented using the Lagrange multiplier method to link macroscopic strain to the boundary displacements of the computational model of a representative volume element. We include the macroscopic strain as a set of additional degrees of freedom in the formulation. Via the Lagrange multipliers, the macroscopic stress naturally arises as the associated forces' that are conjugate to the macroscopic strain displacements'. In contrast to most homogenization schemes, the second Piola-Kirchhoff stress and Green-Lagrange strain have been chosen for the macroscopic stress and strain measures in this formulation. The usage of other stress and strain measures such as the first Piola-Kirchhoff stress and the deformation gradient is discussed in the Appendix.

  • 203.
    Viklund, Amanda
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Hållbarhetslivscykelanalys på kakel och klinker: Analys av vägen från vagga till grav ur ett hållbarhetsperspektiv2014Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    In this report two Sustainability Life Cycle Assessments are carried out for two types of tiles for Riksbyggen, to contribute to a sustainable urban transition. Sustainability Life Cycle Assessment involves performing a life cycle assessment based on four principles based on scientific research and presented by the non- governmental, non-profit organization, The Natural Step. The principles concern raw materials, chemically produced substances, degeneration of nature and social conditions.Origin of products, manufacturing sites and manufacturing procedures were initially completely unknown and much of the work has consisted of finding the entire cycles, understand manufacturing processes of ceramic tiles and evaluating what materials and what type of energy sources that are required for the production. A socially sustainable perspective has been of high relevance alongside an ecologically sustainable perspective.The report begins with the basic underlying facts and the purposes of this investigation and that the reasons why Sustainability Life Cycle Assessments are carried out are to provide Riksbyggen and the own workers with documents presenting Riksbyggens ideas regarding sustainability and to hopefully get the ideas further down in the supply chain. The methods used to fulfill the investigation are presented and scientific facts about LCA and ceramic building materials are reviewed. Furthermore the results for the two products and their life cycles are described. The production areas in Italy and Czech Republic are described. The areas for extracting the materials, Ukraine and Czech Republic, and the different types of clay being used are presented. The impact on workers and areas are described and analyzed and hazardous processes such as glazing are investigated. The analysis mainly touches which processes or materials that have the biggest negative effect on the environment, such as extracting of raw materials, and also a critical analysis of the information sources being used, since they mostly consists of interviews and fieldtrips. The report concludes with an analysis of both the results and the use of Sustainability Life Cycle Assessments. It is concluded that the different tiles can be used in the production still meeting Riksbyggen’s sustainability conditions. At last suggestions for further studies and information dedicated to Riksbyggen are presented.

  • 204.
    Vorobyev, Alexey
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik.
    Garnier, F
    van Dijk, Nico
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Afshar, Reza
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik.
    Hagman, O
    Gamstedt, Kristofer
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik.
    Evaluation of displacements of a wooden hull section of the Vasa ship by means of 3D laser scanning2017Konferensbidrag (Refereegranskat)
  • 205.
    Wigh, Malin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    ANVÄNDNING AV PRODUTIVITETSVERKTYG FÖR ATT NÅ UPPSATTA PROJEKTMÅL: En undersökning på ett Skanska projekt2013Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This is a result of a diploma work in construction engineering. The purpose of this thesis is to investigate the nature of the productivity in a given project and how the Skanska productivity tools were used in this project.

    Interviews were held among workers and management to get some answers on what affected the work and its productivity. The result of the thesis showed that the productivity tools as propulsion analysis and “goal cards”, were not used to a wide extent in this project. Furthermore there was almost no feedback for the one who made the calculation and the offer for the project, which might affect the results on projects negatively in the future.

    Within the project there was a lot of waiting time which affected the productivity. To avoid this there is a need for better planning among cooperating companies and a better planning in the beginning of the project.

  • 206.
    Wikesjö, Oscar
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Enlund, Tobias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    3D-MODELLBYGGHANDLING:VERKLIGHET ELLER UTOPI?: En studie inriktad på kvalitetssäkring2018Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Byggbranschen står i dagens läge inför stora tekniska förändringar,pappersritningar blir till 3D-modeller och allt mer information hanteras digitalt.Rapport har diagnostiserat svagheter som existerar inom dagens granskning av3D-modeller samt legat till grund för utveckling av kvalitativa och struktureradestödpunkter för kontroller av 3D-modeller.I dagens läge saknas tydliga riktlinjer för granskning av 3D-modeller och dettaresulterar i otydligheter gällande granskningsprocessen. I rapporten kommer dennuvarande arbetsmetoden av 3D-granskning undersökas för att identifiera demoment ur granskningsprocessen som behöver förbättras.Arbetet utfördes på White arkitekter där arbetet genomfördes parallellt medprojektering av projektet Celsius i Uppsala. All typ av projektering har skett iRevit och det som gör projektet extra unikt är att all avlämning av bygghandlingar sker i form av 3D-modeller.Informationsinhämtningen för arbetet har skett via relevant litteratur ochintervjuer, dessa var av kvalitativ karaktär och utfördes på fyra personer medvarierande befattningar och erfarenhet från Celsiusprojektet. Resultatet visar att alla respondenter sköter egenkontroller på delarna deansvarar för. De listor som existerar för egenkontroll är inte anpassade för 3Dmodeller.Vidare hävdar de att filtrering av objekt används för att lättare kunnasortera ut information och på så sätt underlätta granskningen. Alla respondenteranser sig kunna utföra sitt huvudsyfte.Denna rapport har tagit fram ett antal stödpunkter, dessa redovisar de steg somkrävs för uppbyggnaden av rutinmässig granskningsmetod vid 3D-modellering.Slutligen återfinns rekommendationer för eventuella framtida verktyg som anses extra intressanta för vidare studier inom 3D-granskning.

  • 207.
    Wänglund, Adam
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Eriksson, Daniel
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    UTVECKLING AV PROJEKTERINGSANVISNINGAR: En utredning rörande hur projekteringsanvisningar bör utformas2017Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    In the process of erecting a building, the precursory design and planning stage is of paramount importance. The foremost managing tool during this stage constitutes of the design guidelines, established by the developer. This report contains a study of how to model said guidelines to achieve a more effective way of working, without compromising the final product, produced at the request of Swedish housing developer Småa AB. The study is based on a series of interviews, where persons involved in the design and planning stage have been asked to share their experiences and opinions about the process and how it affects the end result. The study is based on a series of interviews, where persons involved in the planning and design stage have been asked to share their experiences and opinions regarding the development process and how it affects the end result. During the processing of the collected material, three distinct subject areas emerged; the importance of clear design guidelines, what the design guidelines should cover and how to ensure the quality of the product. Based on these subject areas, the authors have devised a set of recommendations to ensure an effective working method and the quality of the end result.

  • 208.
    Zetterström, Björn
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Jämförelsestudie för tre olika metoder att beräkna genomstansning i betong: Skillnader i genomstansningskapacitet för metoderna i BBK04, EK2 och BHB2014Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Before the European construction standards were introduced in January 2011, it was mainly the

    method in BBK04 that was used for calculating punching capacity in concrete structures, and in less

    common cases the method in BHB. The method of BBK04 is easy to use and have had the same

    structure since the first was published in 1979. The Concrete handbook method (BHB) where usually

    only used when a higher punching capacity was needed and the cross-sectional height where fixed,

    calculations using this method entails more work, but will in return usually give a higher capacity. It

    also allows the use of shear reinforcement to increase the cross-section capacity. The method of

    calculating punching shear in EC2 differs largely from the methods of BBK04 and BHB. The method

    is similar to a large extent of the so called “alternative model” to calculate the shear capacity in

    BBK04.

    The purpose of this study is to make a comparison between the different methods, mentioned above.

    The study aims to find out which one of these models/methods that will provide the maximum

    punching capacity and utilization. The results of the study can then be used to make a quick and fairly

    assessment if a construction can withstand the same load situation that it was originally analyzed for

    when using the European construction standards.

    In the comparison, three different kinds of concrete qualities was used C25/35-C45/55, and four

    different kinds of reinforcement contents ρ = 0.02 – 0.1%, and a span of effective cross section heights

    in the range d = 0.1 - 2m.

    The study shows that for an older concrete structure dimensioned in accordance with BKR and

    BBK04 it’s very likely that the utilization when recalculating it with the Eurocode will not be a

    problem. This seems to apply to all concrete qualities, reinforcing contents and cross-sectional heights

    used in this study. The method in EC2 provides between 20-130 % higher punching capacities. The

    difference between the two methods increases with the cross-sectional height. For effective heights

    over 0.2 m the punching capacity is at least 36 % greater than what is obtained with method in

    BBK04. The load in EC2 is in this case 16-27 % greater than the load obtained when using BKR.

    Even a quite significant increase of the loads could in most cases be done.

    When then concrete manual method (BHB) is used and the reinforcement content of the structure is

    above 0.5 % that method generally achieves better capacities or at least equal capacities compared to

    the method in EC2. For low cross-sectional heights, the method in EC2 sometimes gives better values

    of capacity. It is unlikely that a structure that has been optimized with the help of BHB could

    withstand the greater loads that are achieved when using the Euro codes. This also applies to crosssections that needs shear reinforcement.

  • 209.
    Zoma, Fati
    et al.
    Univ Ouaga 01 Pr Joseph KI ZERBO, Lab Phys & Chem Environm, 03 BP 7021, Ouagadougou, Burkina Faso.
    Toguyeni, David Y. K.
    Univ Ouaga 01 Pr Joseph KI ZERBO, Lab Phys & Chem Environm, 03 BP 7021, Ouagadougou, Burkina Faso.
    Coulibaly, Ousmane
    Univ Ouaga 01 Pr Joseph KI ZERBO, Lab Phys & Chem Environm, 03 BP 7021, Ouagadougou, Burkina Faso.
    Hassel, Ivón
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Ouedraogo, Abdoulaye
    Univ Ouaga 01 Pr Joseph KI ZERBO, Lab Thermal & Renewable Energies, 03 BP 7021, Ouagadougou, Burkina Faso.
    Potentials of an Eco-Friendly Composite in Hot-Dry Climate2018Ingår i: Journal of Renewable Materials, ISSN 2164-6325, E-ISSN 2164-6341, Vol. 6, nr 1, s. 47-54Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study aims to show the aptitude of a locally made composite for providing thermal comfort and mechanical resistance in buildings in hot-dry climates. The thermal characterization reveals that the thermal diffusivity of the studied material is lower than that of commonly used materials such as agglomerated and full cinderblocks and laterite blocks and therefore is a better insulating material. In addition, its thermal inertia is the highest compared to commonly used materials of agglomerated and full cinderblocks, laterite blocks and compressed earth blocks, which implies a longer time lag. On the basis of mechanical resistance, with a compression resistance of 3.61 MPa, the studied material meets the requirement of CRATerre and NBF 02-003 (2009) as a material for construction of single-storey buildings. Therefore, this material, containing 1% Hibiscus sabdariffa fibers and compacted by vibration, is a suitable material for the walls of standing buildings and for thermal comfort in hot dry climates.

  • 210.
    Åslund, Anton
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    5D-modellering i byggskedet: Med inriktning på anläggningsbranschen2014Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    With those utilities and possibilities we have today, 3D-models should be usted more

    than they are. The posibilities to work further with these models are enormous.

    The purpose with this report is to investigate why the BIM technology isn’t used to

    its fully potential in the construction industry. And also to investige the posibilities to

    implement the technique further by interconnecting the 3D-model to more

    information consisting of 4D-BIM and 5D-BIM. By a comparison between the real

    estate industry and the construction industry produce solutions that can be implied in

    the construction industry.

    The methods that have been used in this operation is a study of literature and

    interviews of experts in the industry. Based on these methods the author has

    concluded several reasons why 5D-modeling is so limited as it is. This area is rather

    undiscovered, few in the industry even thinks of this as a problem, or an area that

    needs improvement, so the investigation in the area is very limited. Besides, the time

    it takes for a person to learn a new working progress is time the person often doesn’t

    have. Plus that the new is frightening, the time it takes to learn the new way is

    unknown and the time it takes to imply it in the projekt is unknown. The way you’ve

    always worked is safe and you know approximitly how long it’s going to take.

    One thing that is notable in the construction industry is that the demands from the

    clients is starting to appear and the competens of the contractors doesn’t exist. And

    there is a fatal chans that the demands will increase much faster than the development

    of competens in the industry. For the industry to keep develop in the right pace, the

    industry must dare to invest in 5D-modeling. By giving priority to learn a more

    efficient way of working, by daring to invest economically in software and education of

    competens and to look at these costs as an investment in the future and not a cost

    for the ongoing projekts.

  • 211.
    Åström, Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Användandet av mobila enheter med appsystem och appars fackmannamässiga potential inom byggbranshen2014Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Mobile devices such as tablets and smartphones are quite common in this day. The author of this thesis wanted to know how common these mobile devices are in the building industry and how they are used and what potential an app could have. The author thus conducted an investigation on this matter, mainly in the form of interviews.

    Answers given by the interviews were then used as a basis to survey the usage of mobile devices and the usage of different kinds of apps. An investigation of different apps with the potential to be used by professionals in the building industry has been carried through. Apps which manage such things as scanning documents, measuring distances and handle communication. A further more advanced study of a floor plan making app, called MagicPlan has also been done. The equipment that were used were Samsung Galaxy S2, Apple iPad , Samsung Note 10.1 Tablet, Leica Disto, Leica Scanstation C10, Canon Pixma MP270.

    The results of the examination show that the usages of mobile devices are widely spread in the building industry, however, seldom to its full potential. The results also indicates that the tested apps likely can be used by professionals in some cases.

2345 201 - 211 av 211
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