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  • 1.
    Atashipour, S. R.
    et al.
    Chalmers University of Technology, Sweden.
    Landel, Pierre
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Al-Emrani, M.
    Chalmers University of Technology, Sweden.
    Accuracy evaluation of gamma-method for deflection prediction of partial composite beams2018In: WCTE 2018 - World Conference on Timber Engineering, 2018Conference paper (Refereed)
    Abstract [en]

    In this paper a precise model is established for deflection prediction of mechanically jointed beams with partial composite action. High accuracy of the proposed method is demonstrated through comparison with a comprehensive finite element (FE) modelling for a timber-concrete partial composite beam. Next, the obtained numerical results are compared with gamma-method, a well-known simplified solution for timber engineers according to the Eurocode 5. Validity and accuracy level of the gamma-method are investigated for various boundary conditions as well as different values of beam length-to-depth ratio, and discussed in details.

  • 2.
    Axelson, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Landel, Pierre
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Nagy, Agnes
    Förstärkning av massivträelement – en experimentell studie2014In: Bygg & teknik, Vol. 106, no 2, p. 65-70Article in journal (Other (popular science, discussion, etc.))
  • 3.
    Johansson, Pernilla
    et al.
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Brander, Linus
    RISE - Research Institutes of Sweden, Built Environment, CBI Swedish Cement and Concrete Research Institute.
    Jansson, Anna
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Karlsson, Stefan
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Landel, Pierre
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Svennberg, Kaisa
    Kvalitet hos byggnadsmaterial i cirkulära flöden2017Report (Other academic)
    Abstract [en]

    The aim of the project presented in the report was that construction and demolition waste will be recycled or recycled to a greater extent and at the same time fulfil the quality requirements on the materials.

    The purpose of the project has been to map and compile the knowledge and experience of the technical aspects of circular flows of building materials, focusing on quality issues, identifying new projects that can reduce the amount of construction and demolition waste deposited or burned, as well as creating new networks. There is widespread knowledge in the construction industry about these issues and there are also a wide range of research results in different areas. In the project, knowledge and experience have been gathered through literature studies, workshops and seminars, study visits and interviews.

    The first part of the report discusses general technical experiences and challenges in different parts of the building chain, while challenges for specific material groups are discussed in the second part of the report. These material groups are polymeric materials, flat glass, stone wool, glass wool, plasterboard, crushed concrete, wood and wood-based materials. The report also presents a survey conducted by Optimera among their professional costumers, which aimed at collecting their experiences and views on sustainable construction.

    In general, we can find that there are major challenges in increasing recycling rates for demolition and refurbishment waste. For installation and construction waste, the technical challenges are not as big. Challenges and conditions for increased recycling and reuse with retained good quality vary between different types of materials / products, type of construction project and intended use.

    The report proposes a number of proposals in areas where work can be continued. These include improved / expanded inventory for demolition and refurbishment, routines and sampling methods, proper sorting, handling and storage to ensure the right quality, to provide the ability to separate compound materials, logistics, production technology and quality assurance. The results also show the importance of education, networks and meeting places and that research projects are conducted interdisciplinary. There are good opportunities for increased recycling through cooperation throughout the entire building chain.

  • 4.
    Källander, Björn
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek.
    Landel, Pierre
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Effects of heat treatment of small clearwood samples on equilibrium moisture content and deformation2007In: COST Action E53 The First Conference: Quality Control for Wood and Wood Products, Warsaw University of Life Sciences , 2007, , p. 63-68Conference paper (Refereed)
  • 5.
    Landel, Pierre
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Swedish Technical Benchmarking of TallTimber Buildings2018Report (Other academic)
    Abstract [en]

    The use of wood in the construction of multi-storey buildings has increased since the middle of the 1990’s and is still expected to grow in the future. 1994 the Swedish building rules changed. From material based, the rules became functional based. Before this year, the use of wood in houses with more than two storeys were prohibited for fire safety reasons. Now that wooden multi-storey buildings have been built for almost a quarter of a century, this report presents and explains the current technical requirements that multi-storey residential buildings must achieve:

    - Safety in case of fire, - Safe and comfortable structure, -Healthy indoor climate and frugal heating,

    Good acoustic. Environmental aspects and construction praxis are also shortly developed. Even thought, the list of requirements does not pretend to be exhaustively studied hereby. The choice is also related to the timber structures specificities. Five reference projects from 6 to 8 floors and built between 2006 and 2015 are presented briefly and used as examples along the report. Different wood building systems and technical solutions were used and illustrate the architectural and technical variability in the timber building industry as well as the evolution of the building regulations. The appendices to this report contain further information, drawings and pictures of these reference buildings. This report aims to bring some knowledge and practical ideas to people planning, designing or producing taller timber buildings in Sweden. It should be mention that the second part on safety in case of fire and the fifth part on acoustic require that the reader has some basic knowledge on this technical fields.

  • 6.
    Landel, Pierre
    et al.
    RISE - Research Institutes of Sweden, Built Environment, Building Technology. Linnaeus University, Sweden.
    Linderholt, A.
    Linnaeus University, Sweden.
    Johansson, Marie
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Dynamical properties of a large glulam truss for a tall timber building2018In: WCTE 2018 - World Conference on Timber Engineering, 2018Conference paper (Refereed)
    Abstract [en]

    When designing a tall timber building, the accelerations due to wind loads are in many cases decisive. The parameters governing the dynamic behaviour of the building are the structure's stiffness, damping and mass together with the loads. The first two parameters are not well-known during the serviceability limit state of timber structures generally and of timber connections specifically. In this study, dynamical properties of a large glulam truss, a part of the vertical and horizontal structural system in a residential six-storey timber building, are estimated from measurements made in the manufacturing plant. The timber members of the truss are joined with slotted-in steel plates and dowels. Forced vibrational test data are used to extract the dynamical properties. Finite element (FE) models, supported by the experimental results, were developed and simulations, to study the influence of the connection stiffnesses on the total behaviour, were performed. The vibration test results of measurements made on separate structural parts give valuable input to model timber structures and better possibilities to simulate the dynamic behaviour of tall timber buildings as well as the load distribution in wooden structures in the serviceability limit state.

  • 7.
    Landel, Pierre
    et al.
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Linderholt, Andreas
    Linnaeus University, Sweden.
    Johansson, Marie
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Test-analyses comparisons of a stabilizing glulam truss for a tall building2019In: 2nd International Conference on Computational Methods in Wood Mechanics – from Material Properties to Timber Structures. ECCOMAS Thematic Conference, June 17-19, 2019, Växjö, Sweden, 2019Conference paper (Refereed)
  • 8. Petra, Steen
    et al.
    Landel, Pierre
    RISE - Research Institutes of Sweden, Built Environment, Building Technology.
    Erik, Dölerud
    Modvion, Sweden.
    Otto, Lundman
    Modvion, Sweden.
    Structural design methods for tall timber towers with large wind turbine2019In: International Conference on Computational Methods in Wood Mechanics – from Material Properties to Timber Structures. ECCOMAS Thematic Conference, June 17-19, 2019, Växjö, Sweden, 2019Conference paper (Refereed)
1 - 8 of 8
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