This thesis presents a product development process, where an existing solution on a cab door have been analysed and developed, with the aim to result in a cost-effective concept solution for handling tolerances on the door frame. The methodological approach in this thesis is based on Volvo Construction Equipment’s development model; The Global Development Process, which started with a pre-study phase where the problem formulation was established. The problem formulation in short is to find a solution for how to handle narrow tolerances in steel profiles for the door weldment on cab doors. Various solution ideas were discussed and concepts were generated with focus to design a new cab door corner that would solve the problems addressed by the project. The applied method resulted in a final concept consisting of the same steel profiles but with new dimensions, and two new concepts in each corner; one corner module that is placed inside the steel profiles and joined by welding, and a plastic shell that covers the welded corner. The concept was validated using a prototype of the proposed solution, where tests show that the requirements were achieved, besides a few deficiencies. A cost comparison between the existing and the proposed solution was made within limitations for this thesis. The result of the cost comparison shows an indication of that the proposed solution can be more cost-effective than the existing solution. Some of the recommendations after have completing the project are to make a complete cost comparison to ensure that the indication is correct and to analyse the new components to optimize and define the dimensions of them.

Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-03-06T14:05:20Z No. of bitstreams: 1 josehumbertogoesalves.pdf: 7726809 bytes, checksum: 2bdc724ae928df55c996d5d453664a9a (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-03-06T20:24:55Z (GMT) No. of bitstreams: 1 josehumbertogoesalves.pdf: 7726809 bytes, checksum: 2bdc724ae928df55c996d5d453664a9a (MD5) / Made available in DSpace on 2017-03-06T20:24:55Z (GMT). No. of bitstreams: 1 josehumbertogoesalves.pdf: 7726809 bytes, checksum: 2bdc724ae928df55c996d5d453664a9a (MD5) Previous issue date: 2015-03-02 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Frente ao grande número de entulhos gerados na construção civil atualmente no Brasil, surgem novos métodos construtivos, se servindo de processos mais industrializados para racionalizar os materiais de construção. O Light Steel Frame (LSF) é um desses novos métodos, baseado em perfis de aço que trabalham em conjunto através de subsistemas estruturais, não requisitando água nem produção de materiais in loco. Não só a forma de construir deve ser atualizada para melhor utilizar os recursos produtivos, como também deve-se promover melhorias no gerenciamento das construções. Em virtude disso, uma crescente tecnologia que está cada vez mais sendo agregada na construção civil é a Modelagem De Informação Da Construção, ou simplesmente BIM, da sigla em inglês. BIM permite planejar, projetar, construir, usar e manter uma construção. Para isso, não é necessário que exista um aplicativo que englobe todas essas tarefas. Por utilizar informação parametrizada, aplicativos distintos podem compartilhar uma mesma informação e gerar seus resultados, processo esse denominado de interoperabilidade. Assim, este trabalho tem como foco principal desenvolver uma ferramenta capaz de modelar estruturas em LSF, realizar um pré-cálculo estrutural e também prover meios de permitir a interoperabilidade com outros softwares. Para este fim, foi empregado o SketchUp, que possui uma interface de programação em linguagem Ruby, e possui módulos de geração de dados compatíveis com as necessidades da interoperabilidade. Como resultado, a ferramenta gerada neste trabalho alcançou desempenho satisfatório, mesmo que ainda existam muitos recursos para serem agregados. / The large amount of construction waste currently generated in Brazil demands new construction methods and more industrialized process. The Light Steel Frame (LSF) is one of those new methods based based on structural subsystems comprising steel properties, not ordering water or production of material in loco. Building and its management should be improoved. Building Information Modeling, or simply BIM, allows the planning design, building using and maintaing of building. Therefore, it is not necessary to have an application that includes all these tasks. By means of parameterized information, different applications can share the same information and generate results, a process known as interoperability. This work is mainly focused on developing a tool capable of modeling structures in LSF, performing a structural pre-analysis and also providing a means to enable interoperability with other software. To this end, we applied the SketchUp, which has a programming interface in Ruby language, and has data generation modules compatible with the interoperability needs. As a result, the generated tool in this work has achieved satisfactory performance, even though there are still many resources to be aggregated.

yes / This paper presents the results of a numerical investigation on strategies for enhancing the fire behaviour of concrete-filled steel tubular (CFST) columns by using inner steel profiles such as circular hollow sections (CHS), HEB profiles or embedded steel core profiles. A three-dimensional finite element model is developed for that purpose, which is capable for representing the various types of sections studied and the nonlinear behaviour of the materials at elevated temperatures. High strength steel is considered in the numerical model, as a possible way to lengthen the fire endurance. The numerical model is validated against experimental results available in the literature for various types of steel-concrete composite sections using inner steel profiles, obtaining satisfactory results. Based on the developed numerical model, parametric studies are conducted for investigating the influence of the cross-sectional geometry and the steel grade of the inner profiles on the fire performance of these composite columns, for eventually providing some practical recommendations.

Utmattning av stålmaterial är ett fenomen som varit känt i närmare 190 år men trots det är det fortfarande långt ifrån helt utforskat. Utmattningsegenskaper hos grundmaterial och svetsar är idag relativt utforskat, medan områden som utmattningsegenskaper hos kallformade stålprofiler fortfarande mer eller mindre är outforskat. Med utforskningen av utmattningsegenskaper hos kallformade stålprofiler som huvudsyfte delades examensarbetet upp i två delar. En överliggande kranbomsoptimering med huvudmålet att sänka vikten så mycket som möjligt med hjälp av materialbyte till ett mer höghållfast stål och optimal användning av material med avseende på utmattning. Den andra delen av examensarbetet är en framtagning av en provkropp med huvudmålet att kunna testa utmattningsegenskaper för kallformade stålprofiler samt att ge dimensionerande värden till kranbomsoptimeringen. Provstavsframtagningen resulterade i tre versioner av provkroppar som i teorin ska ge utmattningsegenskaper i longitudinell riktning för kallformade stålprofiler. Eftersom provstavarna inte kunde prövas på grund av tidsbrist baserades kranbomsoptimeringen på teoretiska värden. Resultatet av kranbomsoptimeringen var att vikten kunde sänkas från 1027 kg till 435 kg utan att påverka andra beaktade kranegenskaper. / Even though fatigue in steel structures is a phenomenon that was discovered almost 190 years ago it is still far from fully explored. The fatigue properties of base materials and welded materials are currently relatively well known, but the fatigue properties of cold-formed steel profiles are still more or less unknown. With the investigation of fatigue properties of cold-formed steel profiles as the main purpose, this master thesis was divided into two parts. An overhead optimization of a crane with the main goal of reducing weight as much as possible with the help of upgrading materials to higher strength steels and using the materials in an optimal way with respect to fatigue. The second part of the master thesis is the development of a test specimen with the main goal of testing the fatigue properties of cold-formed steel profiles and to provide dimensioning values for the optimization of the crane. The development of test specimen resulted in three versions of specimens which in theory will provide fatigue properties in the longitudinal direction for cold-formed steel profiles. Since the test specimens could not be tested because of shortage of time, the optimization of the crane had to be based on theoretical values. The results of the optimization were that the weight could be lowered from 1027 kg to 435 kg without affecting any other consideration characteristics of the crane.

The aim of this thesis is to find the best option of the building technology for a house. The thesis is divided into two sections – theoretical and practical. The theoretical section consists of three parts. The first part deals with theory of costs and pricing. Second part specifies types of the budgeting used in Czech Republic and the last part is focused on description of the selected construction systems used for building a house. Second section deals with description and the layout of the house, for which three budgets are set with a respect to the used option of the construction system. Furthermore, a comparison of the technical parameters as well as the costs analysis according to the TSKP is made. Finally, the optimal variant is selected with respect to the price and technical properties.