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Publications (10 of 17) Show all publications
Sejkot, P., Ormarsson, S. & Vessby, J. (2018). Numerical and experimental study of punched metal plate connection used for long-span pitched timber roof truss structure. In: WCTE 2018 - World Conference on Timber Engineering: . Paper presented at WCTE 2018, World Conference on Timber Engineering, August 20-23, 2018, Seoul, Rep. of Korea. World Conference on Timber Engineering (WCTE)
Open this publication in new window or tab >>Numerical and experimental study of punched metal plate connection used for long-span pitched timber roof truss structure
2018 (English)In: WCTE 2018 - World Conference on Timber Engineering, World Conference on Timber Engineering (WCTE) , 2018Conference paper, Published paper (Refereed)
Abstract [en]

According to the harmonized European design code for timber structures, Eurocode 5, all pitched timber trusses used in load bearing roofs are designed as in-plane structures which means that a bracing system must be designed and put in place to prevent the out-of-plane instability. Results from numerical 3D stability analyses of the whole roof structure indicate that the out of plane stability is often the critical factor. Therefore, influence of stiffness properties of that system is studied in detail herein for long-span timber roofs. Focus is put on how the stiffness of the mechanical connections in the roof structure influences the load carrying capacity of the roof. The punched metal plate connections are modelled as non-coupled spring elements connecting the various beam elements in the timber truss respectively. The spring stiffness of the connections is derived from full-scale tests, which were made for all in- and out-of-plane degrees of freedom. To evaluate the experimental testing, a digital image correlation method was used. The results from the digital image correlation tests were compared with numerical simulations of the experimentally tested connections to check the potential of using the numerical simulations instead of the experimental testing to get the stiffness properties of various connections used in the whole roof stability analysis. Based on such analysis, punched metal plate fasteners showed to be an important contributor to the roof stability because of its relatively high stiffness in all six degrees of freedom.

Place, publisher, year, edition, pages
World Conference on Timber Engineering (WCTE), 2018
Keywords
Timber truss structures, punched metal plate connections, numerical analysis, top chord buckling length
National Category
Construction Management
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-82136 (URN)2-s2.0-85058165120 (Scopus ID)
Conference
WCTE 2018, World Conference on Timber Engineering, August 20-23, 2018, Seoul, Rep. of Korea
Available from: 2019-04-24 Created: 2019-04-24 Last updated: 2019-05-27Bibliographically approved
Machalická, K., Sejkot, P. & Nechanický, P. (2016). Hybridní konstrukce ze skla a dřeva. TZB-info: portál pro technická zařízení budov, 18(3)
Open this publication in new window or tab >>Hybridní konstrukce ze skla a dřeva
2016 (Czech)In: TZB-info: portál pro technická zařízení budov, E-ISSN 1801-4399, Vol. 18, no 3, p. 5Article in journal (Refereed) Published
Abstract [en]

Timber and glass are the materials that have excellent aesthetic qualities. In current architecture, glass, as well as wood, are increasingly used for the visually exposed structures. Since glass is a brittle material, various types of hybrid structures are developed. Glass in hybrid element is combined with other material (eg. concrete, timber, steel, aluminium etc.) to increase load-bearing capacity and stiffness of the element, achieve safe failure behaviour together with high level of transparency. Nowadays, several European universities and research centres deal with the glass-timber load-bearing elements. This article provides an overview of the developed hybrid timber-glass structures including an experimental analysis of adhesive timber-glass joints, which was performed at Czech Technical University in Prague.

Publisher
p. 5
National Category
Building Technologies
Identifiers
urn:nbn:se:lnu:diva-73290 (URN)
Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-05-14Bibliographically approved
Machalická, K., Sejkot, P. & Eliášová, M. (2016). Nosné konstrukce ze skla a dřeva. Materiály pro stavbu, 22(2), 31-35
Open this publication in new window or tab >>Nosné konstrukce ze skla a dřeva
2016 (Czech)In: Materiály pro stavbu, ISSN 1213-0311, Vol. 22, no 2, p. 31-35Article in journal (Other academic) Published
Abstract [cs]

Rostoucí zájem o sklo jako konstrukční materiál vede k jeho uplatnění mimo jiné i v dřevěných konstrukcích, např. pro vnější fasádní prvky nebo sloupy či nosníky uvnitř budovy. Sklo je křehký materiál, ale dosahuje až šestkrát vyšší tuhosti než dřevo. Vhodnou kombinací obou těchto materiálů lze vytvořit takový kompozitní prvek, kde slabé vlastnosti jednoho materiálu (např. křehkost skla a nízká pevnost v tahu) lze vhodně doplnit vlastnostmi druhého materiálu (např. pevností dřeva v ohybu a duktilitou v tlaku).

National Category
Building Technologies
Identifiers
urn:nbn:se:lnu:diva-73315 (URN)
Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-05-14Bibliographically approved
Sejkot, P., Kuklík, P., Ormarsson, S. & Patlakas, P. (2016). Numerical simulations of timber element connections using angle brackets with a rib under the external load. In: Proceedings of the 2016 World Conference on Timber Engineering (WCTE): . Paper presented at WCTE 2016 World Conference on Timber Engineering, August 22-25, 2016, Vienna, Austria.. Vienna University of Technology, Austria
Open this publication in new window or tab >>Numerical simulations of timber element connections using angle brackets with a rib under the external load
2016 (English)In: Proceedings of the 2016 World Conference on Timber Engineering (WCTE), Vienna University of Technology, Austria , 2016Conference paper, Published paper (Refereed)
Abstract [en]

The paper presents experimental, numerical, and analytical methods for the prediction of the loadbearing capacity of timber connections with metal angle brackets, utilising annular ring nails as fasteners. Full-scale testing experiments were performed in order to obtain the stiffness of the connection. Numerical simulations are employed to predict the load-bearing capacity of the angle brackets, when the external force is in the direction of the opening of the angle bracket. The characteristic load-bearing capacity of the connection was calculated using both the results of the numerical simulation, and analytical formulas, utilising laboratory measurements of the timber density. The paper presents the results of the three approaches, allowing direct comparison of the veracity of the simulations.

Place, publisher, year, edition, pages
Vienna University of Technology, Austria, 2016
National Category
Construction Management
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-68213 (URN)978-3-903039-00-1 (ISBN)
Conference
WCTE 2016 World Conference on Timber Engineering, August 22-25, 2016, Vienna, Austria.
Available from: 2017-10-05 Created: 2017-10-05 Last updated: 2018-05-14Bibliographically approved
Sejkot, P., Ormarsson, S., Vessby, J. & Kuklik, P. (2015). Determination of Load Bearing Capacity for Spatial Joint with Steel Angle Brackets. In: Sahmenko, G; Rucevskis, S; Bajare, D (Ed.), 2ND INTERNATIONAL CONFERENCE ON INNOVATIVE MATERIALS, STRUCTURES AND TECHNOLOGIES: . Paper presented at 2nd International Conference on Innovative Materials, Structures and Technologies (IMST), SEP 30-OCT 02, 2015, Riga, LATVIA. , Article ID UNSP 012070.
Open this publication in new window or tab >>Determination of Load Bearing Capacity for Spatial Joint with Steel Angle Brackets
2015 (English)In: 2ND INTERNATIONAL CONFERENCE ON INNOVATIVE MATERIALS, STRUCTURES AND TECHNOLOGIES / [ed] Sahmenko, G; Rucevskis, S; Bajare, D, 2015, article id UNSP 012070Conference paper, Published paper (Refereed)
Abstract [en]

The design of spatial connections in load bearing timber structures with steel angle brackets has insufficient support in the existing design standards. Therefore, research has been necessary to improve this state of the art. In the current paper an experimental study on two designs of angle brackets is presented and the results from full-scale experiments are compared to numerical and analytical computational models.

Series
IOP Conference Series-Materials Science and Engineering, ISSN 1757-8981 ; 96
National Category
Civil Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-48303 (URN)10.1088/1757-899X/96/1/012070 (DOI)000365029600070 ()2-s2.0-84960415614 (Scopus ID)
Conference
2nd International Conference on Innovative Materials, Structures and Technologies (IMST), SEP 30-OCT 02, 2015, Riga, LATVIA
Available from: 2015-12-11 Created: 2015-12-11 Last updated: 2019-05-22Bibliographically approved
Machalická, K., Sejkot, P. & Nechanický, P. (2015). Hybridní konstrukce ze dřeva a skla. In: Dřevostavby 2015: . Paper presented at Dřevostavby 2015, Prague, Czech Republic, April 1-2, 2015 (pp. 203-204). Volyně: VOŠ Volyně
Open this publication in new window or tab >>Hybridní konstrukce ze dřeva a skla
2015 (Czech)In: Dřevostavby 2015, Volyně: VOŠ Volyně , 2015, p. 203-204Conference paper, Oral presentation with published abstract (Other academic)
Abstract [cs]

Dřevo i sklo jsou materiály, které vynikají svými estetickými vlastnostmi. V současné architektuře je sklo, stejně tak jako dřevo, stále častěji používáno na pohledově exponované nosné konstrukce. Protože sklo je křehký materiál, jsou vyvíjeny různé druhy hybridních konstrukcí, kde je sklo kombinováno s jinými materiály (např. beton, dřevo, ocel, hliník apod.) s cílem zvýšit únosnost prvku, dosáhnout bezpečného chování při porušení skla a současně zachovat vysokou míru transparentnosti. Výzkumem sklo-dřevěných konstrukcí se v současné době zabývá několik evropských univerzit, proto se tento článek zabývá touto problematikou.

Place, publisher, year, edition, pages
Volyně: VOŠ Volyně, 2015
Keywords
sklo-dřevěné konstrukce, lepený spoj, kompozitní panel, hybridní nosník, fasádní prvek, udržitelnost
National Category
Building Technologies
Identifiers
urn:nbn:se:lnu:diva-73340 (URN)9788086837727 (ISBN)
Conference
Dřevostavby 2015, Prague, Czech Republic, April 1-2, 2015
Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-05-14Bibliographically approved
Sejkot, P. & Kuklík, P. (2015). Navrhování prostorových přípojů dřevostaveb za pomoci kování. TZB-info: portál pro technická zařízení budov, 17(11)
Open this publication in new window or tab >>Navrhování prostorových přípojů dřevostaveb za pomoci kování
2015 (Czech)In: TZB-info: portál pro technická zařízení budov, ISSN 1801-4399, Vol. 17, no 11Article in journal (Refereed) Published
Abstract [en]

There is a significant possibility of improving the load bearing capacities calculated according to the existing Standards of spatial connections with thin walled metal nailing plates. The reason is that the design of these connecting elements has inadequate support in the existing Standards and Technical Reports. The improvement can make them more consistent with the results from tests. Therefore, research has been called to improve this state of the art. The paper presents the whole experimental study of angle brackets which consists of full-scale experiments, numerical models of the connections, current analytical calculation approaches and proposals how to improve them.

National Category
Building Technologies
Identifiers
urn:nbn:se:lnu:diva-73339 (URN)
Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-05-14Bibliographically approved
Sejkot, P., Machalická, K., Nechanický, P. & Patlakas, P. (2015). Teretron - první SPIN-OFF projekt univerzitního centra UCEEB. In: Matuška, T. (Ed.), Sympozium Energeticky efektivní budovy 2015: . Paper presented at Sympozium Energeticky efektivní budovy 2015, Buštěhrad, Czech Republic, October 15, 2015. Prague: Společnost pro techniku prostředí
Open this publication in new window or tab >>Teretron - první SPIN-OFF projekt univerzitního centra UCEEB
2015 (Czech)In: Sympozium Energeticky efektivní budovy 2015 / [ed] Matuška, T., Prague: Společnost pro techniku prostředí , 2015Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

The paper presents one of the first Czech “SPIN-OFF” projects. These projects are not only privilege of developed markets such as in the UK or in the US, but they are beginning to expand into other markets, including the Czech one. The project is realized in cooperation of the University Center for Energy Efficient Buildings (UCEEB) ČVUT and British company The Rope Effect Ltd. The subject of the project is developing an independent generic computer software Teretron for designing connections and members of timber structures according to the Eurocodes. The product has successfully completed beta testing and in the second half of September 2015 is entering into the Czech market. Detailed information can be found at www.teretron.cz.

Place, publisher, year, edition, pages
Prague: Společnost pro techniku prostředí, 2015
National Category
Building Technologies
Identifiers
urn:nbn:se:lnu:diva-73341 (URN)9788002026150 (ISBN)
Conference
Sympozium Energeticky efektivní budovy 2015, Buštěhrad, Czech Republic, October 15, 2015
Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-05-14Bibliographically approved
Kuklík, P., Nechanický, P., Sejkot, P. & Machalická, K. (2015). Teretron: první SPIN-OFF projekt univerzitního centra UCEEB. In: VOŠ Volyně (Ed.), Dřevostavby 2015: . Paper presented at Dřevostavby 2015, Prague, Czech Republic, April 1-2, 2015 (pp. 209-210). Volyně: VOŠ Volyně
Open this publication in new window or tab >>Teretron: první SPIN-OFF projekt univerzitního centra UCEEB
2015 (Czech)In: Dřevostavby 2015 / [ed] VOŠ Volyně, Volyně: VOŠ Volyně , 2015, p. 209-210Conference paper, Oral presentation with published abstract (Other academic)
Abstract [cs]

Příspěvek představuje jeden z prvních českých „SPIN-OFF“ projektů, který si klade za cíl nejen představení výhod takového typu projektu, který je v posledních letech populární na vyspělých trzích, například ve Velké Británii a USA, ale zároveň vkládá naděje do úspěchu nového, zajímavého projektu. Projekt je realizován ve spolupráci Univerzitního centra UCEEB a britské společnosti The Rope Effect Ltd vyvíjející výpočetní software Teretron. Projekt je ve fázi beta testování a brzy bude připraven pro český trh. 

Place, publisher, year, edition, pages
Volyně: VOŠ Volyně, 2015
Keywords
Teretron, výpočetní software, navrhování dřevěných konstrukcí, spin-off, univerzitní centrum
National Category
Building Technologies
Identifiers
urn:nbn:se:lnu:diva-73345 (URN)9788086837727 (ISBN)
Conference
Dřevostavby 2015, Prague, Czech Republic, April 1-2, 2015
Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-05-14Bibliographically approved
Kuklík, P., Ormarsson, S., Dolejš, J., Ptáček, P., Jára, R., Pošta, J., . . . Leiterman, Z. (2015). Úhelníky s prolisem ve spojích dřevěných prvků. In: Matuška, T. (Ed.), Sympozium Energeticky efektivní budovy 2015: . Paper presented at Sympozium Energeticky efektivní budovy 2015, Buštěhrad, Czech Republic,October 15, 2015 (pp. 149-154). Prague: Společnost pro techniku prostředí
Open this publication in new window or tab >>Úhelníky s prolisem ve spojích dřevěných prvků
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2015 (Czech)In: Sympozium Energeticky efektivní budovy 2015 / [ed] Matuška, T., Prague: Společnost pro techniku prostředí , 2015, p. 149-154Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

The paper presents load-bearing capacity calculation methods for timber elements connections by angle brackets with a rib. As connectors, annular ring nails were used. Paper brings direct comparison of results from full-scale tests, analytical calculations and numerical simulations of connections under the external load using two different versions of brackets.

Place, publisher, year, edition, pages
Prague: Společnost pro techniku prostředí, 2015
National Category
Building Technologies
Identifiers
urn:nbn:se:lnu:diva-73344 (URN)9788002026150 (ISBN)
Conference
Sympozium Energeticky efektivní budovy 2015, Buštěhrad, Czech Republic,October 15, 2015
Note

KUKLÍK, P., et al. Úhelníky s prolisem ve spojích dřevěných prvků. In: MATUŠKA, T., ed. Sympozium Energeticky efektivní budovy 2015. Sympozium Energeticky efektivní budovy 2015. Buštěhrad, 15.10.2015. Praha: Společnost pro techniku prostředí. 2015, s. 149-154. 1. vydání. ISBN 978-80-02-02615-0

Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-05-14Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0919-9485

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