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Publications (8 of 8) Show all publications
Petra, S., Landel, P., Erik, D. & Otto, L. (2019). Structural design methods for tall timber towers with large wind turbine. In: International Conference on Computational Methods in Wood Mechanics – from Material Properties to Timber Structures. ECCOMAS Thematic Conference, June 17-19, 2019, Växjö, Sweden: . Paper presented at CompWood 2019.
Open this publication in new window or tab >>Structural design methods for tall timber towers with large wind turbine
2019 (English)In: 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, Oral presentation with published abstract (Refereed)
National Category
Building Technologies Infrastructure Engineering Architectural Engineering
Identifiers
urn:nbn:se:ri:diva-39215 (URN)978-91-88898-64-7 (ISBN)
Conference
CompWood 2019
Funder
Swedish Energy Agency
Available from: 2019-06-24 Created: 2019-06-24 Last updated: 2019-06-26Bibliographically approved
Landel, P., Linderholt, A. & Johansson, M. (2019). Test-analyses comparisons of a stabilizing glulam truss for a tall building. In: 2nd International Conference on Computational Methods in Wood Mechanics – from Material Properties to Timber Structures. ECCOMAS Thematic Conference, June 17-19, 2019, Växjö, Sweden: . Paper presented at CompWood 2019.
Open this publication in new window or tab >>Test-analyses comparisons of a stabilizing glulam truss for a tall building
2019 (English)In: 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, Oral presentation with published abstract (Refereed)
National Category
Building Technologies
Identifiers
urn:nbn:se:ri:diva-39047 (URN)978-91-88898-64-7 (ISBN)
Conference
CompWood 2019
Funder
Swedish Research Council Formas, 942-2015-115
Available from: 2019-06-18 Created: 2019-06-18 Last updated: 2019-06-27Bibliographically approved
Atashipour, S. R., Landel, P. & Al-Emrani, M. (2018). Accuracy evaluation of gamma-method for deflection prediction of partial composite beams. In: WCTE 2018 - World Conference on Timber Engineering: . Paper presented at 2018 World Conference on Timber Engineering, WCTE 2018, 20 August 2018 through 23 August 2018.
Open this publication in new window or tab >>Accuracy evaluation of gamma-method for deflection prediction of partial composite beams
2018 (English)In: WCTE 2018 - World Conference on Timber Engineering, 2018Conference paper, Published 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.

Keywords
Exact solution, Gamma-method, Partial composite, Shear deformations, Composite beams and girders, Shear deformation, Timber, Accuracy evaluation, Composite action, Gamma method, Numerical results, Partial composite beams, Precise modeling, Various boundary conditions, Numerical methods
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-36674 (URN)2-s2.0-85058157422 (Scopus ID)
Conference
2018 World Conference on Timber Engineering, WCTE 2018, 20 August 2018 through 23 August 2018
Available from: 2018-12-21 Created: 2018-12-21 Last updated: 2019-06-27Bibliographically approved
Landel, P., Linderholt, A. & Johansson, M. (2018). Dynamical properties of a large glulam truss for a tall timber building. In: WCTE 2018 - World Conference on Timber Engineering: . Paper presented at 2018 World Conference on Timber Engineering, WCTE 2018, 20 August 2018 through 23 August 2018.
Open this publication in new window or tab >>Dynamical properties of a large glulam truss for a tall timber building
2018 (English)In: WCTE 2018 - World Conference on Timber Engineering, 2018Conference paper, Published 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.

Keywords
Experimental modal analysis, Slotted-in steel plates with dowels connection, Stiffness and damping, Timber joints, Vibrational testing, Damping, Fasteners, Modal analysis, Plates (structural components), Stiffness, Trusses, Vibration analysis, Wooden buildings, Steel plates, Timber
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-36671 (URN)2-s2.0-85058173513 (Scopus ID)
Conference
2018 World Conference on Timber Engineering, WCTE 2018, 20 August 2018 through 23 August 2018
Available from: 2018-12-21 Created: 2018-12-21 Last updated: 2019-06-27Bibliographically approved
Landel, P. (2018). Swedish Technical Benchmarking of TallTimber Buildings.
Open this publication in new window or tab >>Swedish Technical Benchmarking of TallTimber Buildings
2018 (English)Report (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.

Publisher
p. 69
Series
RISE Rapport ; 2018:67
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37720 (URN)978-91-88907-11-0 (ISBN)
Available from: 2019-02-04 Created: 2019-02-04 Last updated: 2019-06-27Bibliographically approved
Johansson, P., Brander, L., Jansson, A., Karlsson, S., Landel, P. & Svennberg, K. (2017). Kvalitet hos byggnadsmaterial i cirkulära flöden.
Open this publication in new window or tab >>Kvalitet hos byggnadsmaterial i cirkulära flöden
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2017 (Swedish)Report (Other academic)
Alternative title[en]
Quality of building materials in circular material flows
Abstract [sv]

Denna rapport är en del av ett projekt med det övergripande målet att bygg- och rivningsavfall i högre utsträckning skall återvinnas eller återanvändas. Detta utan att kvaliteten på materialet, och därmed framtida byggnader, försämras.

Syftet med projektet har varit att kartlägga och sammanställa de kunskaper och erfarenheter som finns kring de tekniska aspekterna vid cirkulära flöden av byggmaterial, med fokus på kvalitetsfrågor, att identifiera nya projekt som kan minska mängden bygg- och rivningsavfall som deponeras eller förbränns samt att skapa nya nätverk. Det finns spridd kunskap i byggbranschen om dessa frågor och dessutom finns en mängd forskningsresultat inom olika områden. I projektet har kunskaper och erfarenheter inom området samlats in genom litteraturstudier, workshops och seminarier, studiebesök och intervjuer.

I första delen av rapporten diskuteras generella tekniska erfarenheter och utmaningar i olika delar av byggkedjan, medan utmaningar för specifika materialgrupper diskuteras i den andra delen av rapporten. Dessa materialgrupper är polymera material, planglas, stenull, glasull, gipsskivor, krossad betong samt trä och träbaserade material. I rapporten redovisas en enkätundersökning som genomförts av Optimera hos deras proffskunder, i syfte att samla in dessas erfarenheter och synpunkter kring hållbart byggande.

Generellt kan vi konstatera att det finns stora utmaningar med att öka återvinningsgraden för rivnings- och ombyggnadsavfall. För installationsspill och byggavfall är de tekniska utmaningarna inte lika stora. Utmaningar och förutsättningar för ökad återvinning med bibehållen god kvalitet varierar mellan olika materialslag/produkter, typ av byggprojekt samt avsedd användning.

I rapporten föreslås ett antal konkreta förslag på områden där arbetet kan drivas vidare. Dessa inkluderar bland annat förbättrad/utökad inventering inför rivning och ombyggnad, rutiner och metoder för provtagning, korrekt sortering, hantering och lagring för att få rätt och jämn kvalitet, ge möjlighet för separering av sammansatta material, logistikfrågor, produktionstekniska lösningar samt kvalitetssäkring. Resultaten visar också på vikten av utbildning, nätverk och mötesplatser samt att forskningsprojekt genomförs tvärvetenskapligt. Det finns goda möjligheter för ökad återvinning genom samarbete genom hela byggkedjan.

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.

Publisher
p. 58
Series
RISE Rapport ; 2017:55
Series
SBUF ; 13203
Keywords
building materials, reuse, recycling, polymeric materials, gypsum board, concrete, stone wool, glass wool, wood, wooden products
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-33195 (URN)978-91-88695-22-2 (ISBN)
Projects
Möjligheter för ökade cirkulära flöden av byggmaterial, steg 1
Funder
SBUF - Sveriges Byggindustriers Utvecklingsfond, 13203
Available from: 2018-01-29 Created: 2018-01-29 Last updated: 2019-06-27Bibliographically approved
Axelson, M., Landel, P. & Nagy, A. (2014). Förstärkning av massivträelement – en experimentell studie (ed.). Bygg & teknik, 106(2), 65-70
Open this publication in new window or tab >>Förstärkning av massivträelement – en experimentell studie
2014 (Swedish)In: Bygg & teknik, Vol. 106, no 2, p. 65-70Article in journal (Other (popular science, discussion, etc.)) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-8150 (URN)16263 (Local ID)16263 (Archive number)16263 (OAI)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-06-27Bibliographically approved
Källander, B. & Landel, P. (2007). Effects of heat treatment of small clearwood samples on equilibrium moisture content and deformation (ed.). In: COST Action E53 The First Conference: Quality Control for Wood and Wood Products: . Paper presented at COST Action E53 The First Conference: Quality Control for Wood and Wood Products.. Warsaw University of Life Sciences
Open this publication in new window or tab >>Effects of heat treatment of small clearwood samples on equilibrium moisture content and deformation
2007 (English)In: COST Action E53 The First Conference: Quality Control for Wood and Wood Products, Warsaw University of Life Sciences , 2007, , p. 63-68Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Warsaw University of Life Sciences, 2007. p. 63-68
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-11682 (URN)8331 (Local ID)8331 (Archive number)8331 (OAI)
Conference
COST Action E53 The First Conference: Quality Control for Wood and Wood Products.
Available from: 2016-09-13 Created: 2016-09-13 Last updated: 2019-06-27Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8970-7114

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