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  • 1.
    Jára, Robert
    et al.
    UCEEB , ČVUT, Czech Republic.
    Ptáček, Petr
    UCEEB , ČVUT, Czech Republic.
    Pošta, Jan
    UCEEB , ČVUT, Czech Republic.
    Sejkot, Petr
    UCEEB , ČVUT, Czech Republic.
    Nechanický, Pavel
    České vysoké učení technické, Czech Republic.
    Kuklík, Petr
    České vysoké učení technické, Czech Republic.
    Machalická, Klára
    České vysoké učení technické, Czech Republic.
    Ormarsson, Sigurdur
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Patlakas, Panagiotis
    Southampton Solent University, UK.
    Navrhování spojů dřevěných prvků za pomoci kování2016In: Dřevostavby 2016 / [ed] VOŠ Volyně, Volyně, 2016, p. 187-189Conference paper (Other academic)
    Abstract [cs]

    Článek je zaměřen na řešení problematiky spojů dřevěných prvků za pomoci tenkostěnných ocelových elementů aneb kování, kde jako spojovací prvek jsou použity kolíkové spojovací prostředky.

  • 2.
    Kuklík, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Nechanický, Pavel
    Czech Technical University in Prague, Czech Republic.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Machalická, Klára
    Czech Technical University in Prague, Czech Republic.
    Teretron: první SPIN-OFF projekt univerzitního centra UCEEB2015In: Dřevostavby 2015 / [ed] VOŠ Volyně, Volyně: VOŠ Volyně , 2015, p. 209-210Conference paper (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. 

  • 3.
    Kuklík, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Ormarsson, Sigurdur
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Dolejš, Jakub
    Czech Technical University in Prague, Czech Republic.
    Ptáček, Petr
    Czech Technical University in Prague, Czech Republic.
    Jára, Robert
    Czech Technical University in Prague, Czech Republic.
    Pošta, Jan
    Czech Technical University in Prague, Czech Republic.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Leiterman, Zdeněk
    BOVA Březnice spol. s.r.o., Czech Republic.
    Úhelníky s prolisem ve spojích dřevěných prvků2015In: Sympozium Energeticky efektivní budovy 2015 / [ed] Matuška, T., Prague: Společnost pro techniku prostředí , 2015, p. 149-154Conference paper (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.

  • 4.
    Machalická, Klára
    et al.
    Czech Technical University in Prague, Czech Republic.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Eliášová, Martina
    Czech Technical University in Prague, Czech Republic.
    Nosné konstrukce ze skla a dřeva2016In: Materiály pro stavbu, ISSN 1213-0311, Vol. 22, no 2, p. 31-35Article in journal (Other academic)
    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).

  • 5.
    Machalická, Klára
    et al.
    Czech Technical University in Prague, Czech Republic.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Nechanický, Pavel
    Czech Technical University in Prague, Czech Republic.
    Hybridní konstrukce ze dřeva a skla2015In: Dřevostavby 2015, Volyně: VOŠ Volyně , 2015, p. 203-204Conference paper (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.

  • 6.
    Machalická, Klára
    et al.
    Czech Technical University in Prague, Czech Republic.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Nechanický, Pavel
    Czech Technical University in Prague, Czech Republic.
    Hybridní konstrukce ze skla a dřeva2016In: TZB-info: portál pro technická zařízení budov, E-ISSN 1801-4399, Vol. 18, no 3, p. 5Article in journal (Refereed)
    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.

  • 7.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Ocelové spoje dřevěných konstrukcí: Steel connections of timber structures2013In: Sborník semináře doktorandů katedry ocelových a dřevěných konstrukcí 2013 / [ed] Studnička, J. & Řehoř, F., Prague: Czech Technical University in Prague , 2013, p. 15-16Conference paper (Refereed)
    Abstract [en]

    There is a significant difference between calculated load bearing capacities of three-dimensional nailing plates and the values received by tests.

    It is the subject of the Author’s research to improve this state by developing the new European Technical Approval Guideline based on calculation method assisted by testing. The method combines both experiments and simple calculations advantages. The method is more effective compared to experiments and more accurate compared to simple calculations.

  • 8.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Optimalizace tenkostěnných ocelových plechů kování: Thin-walled steel elements optimization2014In: Sborník semináře doktorandů katedry ocelových a dřevěných konstrukcí 2014 / [ed] Studnička, J. & Řehoř, F., Prague: Czech Technical University in Prague , 2014, p. 35-38Conference paper (Refereed)
    Abstract [en]

    There is a significant possibility of improving the load bearing capacities calculated according to the existing European Standards of spatial connections with thin walled steel nailing plates. Therefore, research has been called to improve this state of the art. The paper presents an experimental study on three versions of angle brackets where the results from full scale experiments are compared to different calculation procedures. 

  • 9.
    Sejkot, Petr
    Czech Technical University in Prague, Czech Republic.
    Úhelníky s prolisem ve spojích dřevěných prvků2015Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The thesis deals with appropriate methods to determinate load-bearing capacities of timber structures joints using angle brackets with a rib. In these joints, annular ring nails were used as connectors.

    During an experimental approach, full-scale load tests of whole joints were performed. Their load-bearing capacity was evaluated according to the actual Standards.

    During an analytic approach, calculation procedures were determined to calculate load-bearing capacities of tested joints and used connectors – annular ring nails.

    During numerical approach, full-scale experiments of the joints were simulated in Abaqus CAE software.

    To sum up, results according to these three methods are directly compared in the thesis. Moreover, thanks to the calculation methods validated in this thesis, the BOVA Březnice Ltd. changed the geometry of produced metal works and significantly improved its load-bearing capacities.

  • 10.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    Design of Three-Dimensional Nailing Plates2013In: Ninth International PhD&DLA Symposium: Abstracts book / [ed] Ivanyi, P., 2013, p. 144-144Conference paper (Refereed)
    Abstract [en]

    The timber connections using thin-walled metal elements gradually supplant traditional carpentry joints. Their main advantage is that they do not weaken the connected timber elements. Other advantages include the possibility of in-situ implementing and possibility of direct connection of timber elements to steel and concrete structures.

    The main disadvantage of designing timber connections using thin-walled metal elements is an insufficient support in European Standards. Because of it, it is not possible to design these elements competitively.

    The aim of this work is to design and investigate metal works used in timber engineering with connectors placed closer to each other than according to the raster from Eurocode 5. This design is based on Annex D of Eurocode0, which allows designing based on experiments.

  • 11.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    Czech Technical University in Prague, Czech Republic.
    Design of Three-Dimensional Nailing Plates2014In: Experimental Research with Timber / [ed] Kay-Uwe Schober, Bath: University of Bath , 2014, p. 9-12Conference paper (Refereed)
    Abstract [en]

    There is a significant possibility to improve calculated load bearing capacities of spatial connections with thin walled metal nailing plates making them more consistent with the results from tests. The reason is that the design of these connecting elements has inadequate support in the existing Standards. Therefore, it is the intention of the research to improve on this state of knowledge. This paper describes the whole process of the research which consists of the full scale experiments, 3D FEM models in Abaqus CAE and the developing of an existing analytic solution.

  • 12.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    Kování pro dřevěné konstrukce2014In: Stavebnictví 2014, 2014, Vol. 8, p. 50-55Conference paper (Other academic)
  • 13.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    Czech Technical University in Prague, Czech Republic.
    Metal Work Used in Timber Engineering2014In: WCTE 2014 Book of Abstracts: Volume II / [ed] Salenkovich, A., Quebec City: Universite Laval , 2014, Vol. 2, p. 51-52Conference paper (Refereed)
    Abstract [en]

    There is a significant possibility to increase load bearing capacities of thin walled three-dimensional nailing plates by optimization. Nevertheless design of three-dimen sional nailing plates has an inadequate support in Standards. It is the subject of the Author’s research to improve this state by developing optimization method based on 3D FEM calculation method assisted by testing. This paper is focused on the process of optimization. The paper describes the progress of the experiments, their evaluation and analysis of the results in Abaqus FEM software. 

  • 14.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    Czech Technical University in Prague, Czech Republic.
    Navrhování prostorových přípojů dřevostaveb za pomoci kování2014In: Dřevostavby 2014, Volyně: VOŠ Volyně , 2014, p. 185-188Conference paper (Other academic)
    Abstract [cs]

    V současné době jsou vypočtené únosnosti prostorových přípojů dřevostaveb za pomoci kování výrazně nižší, než experimentálně zjištěné hodnoty. Důvodem je nedostatečná podpora výpočtů v současném znění technických předpisů a norem. Výzkum na ČVUT v Praze se proto tímto tématem zabývá a klade si za cíle doplnit předpisy a normy tak, aby vypočítané hodnoty únosnosti lépe odpovídaly experimentálně zjištěným hodnotám. Tento příspěvek přibližuje celý proces výzkumu od experimentů v reálném měřítku, přes numerické modely přípojů až po současné analytické přístupy a návrh na jejich zlepšení.

  • 15.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    Czech Technical University in Prague, Czech Republic.
    Navrhování prostorových přípojů dřevostaveb za pomoci kování2015In: TZB-info: portál pro technická zařízení budov, ISSN 1801-4399, Vol. 17, no 11Article in journal (Refereed)
    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.

  • 16.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    Czech Technical University in Prague, Czech Republic.
    Dolejš, Jakub
    Czech Technical University in Prague, Czech Republic.
    Metal work used in timber engineering2014In: WCTE 2014: World Conference on Timber EngineeringQuebec City, Canada, August 10-14, 2014 PROCEEDINGS / [ed] Alexander Salenikovich, 2014, article id 471Conference paper (Refereed)
    Abstract [en]

    There is a significant possibility of improving the load bearing capacities calculated according to the existingStandards of spatial connections with thin walled metal nailing plates. The reason is that the design of these connectingelements has inadequate support in the existing Standards. The improvement can make them more consistent with theresults from tests. Therefore, research has been called to improve this state of the art. The paper presents an experimentalstudy on two versions of angle brackets where the results from full scale experiments are compared to different calculationprocedures.

  • 17.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Kuklík, Petr
    CTU in Prague, Czech Republic.
    Ormarsson, Sigurdur
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Patlakas, Panagiotis
    Southampton Solent University, UK.
    Numerical simulations of timber element connections using angle brackets with a rib under the external load2016In: Proceedings of the 2016 World Conference on Timber Engineering (WCTE), Vienna University of Technology, Austria , 2016Conference 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.

  • 18.
    Sejkot, Petr
    et al.
    Czech Technical University in Prague, Czech Republic.
    Machalická, Klára
    Czech Technical University in Prague, Czech Republic.
    Nechanický, Pavel
    Czech Technical University in Prague, Czech Republic.
    Patlakas, Panagiotis
    Southampton Solent University, UK.
    Teretron - první SPIN-OFF projekt univerzitního centra UCEEB2015In: Sympozium Energeticky efektivní budovy 2015 / [ed] Matuška, T., Prague: Společnost pro techniku prostředí , 2015Conference paper (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.

  • 19.
    Sejkot, Petr
    et al.
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Ormarsson, Sigurdur
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Vessby, Johan
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Numerical and experimental study of punched metal plate connection used for long-span pitched timber roof truss structure2018In: WCTE 2018 - World Conference on Timber Engineering, World Conference on Timber Engineering (WCTE) , 2018Conference 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.

  • 20.
    Sejkot, Petr
    et al.
    Czech Tech Univ, Czech Republic.
    Ormarsson, Sigurdur
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Vessby, Johan
    Linnaeus University, Faculty of Technology, Department of Building Technology.
    Kuklik, P.
    Czech Tech Univ, Czech Republic.
    Determination of Load Bearing Capacity for Spatial Joint with Steel Angle Brackets2015In: 2ND INTERNATIONAL CONFERENCE ON INNOVATIVE MATERIALS, STRUCTURES AND TECHNOLOGIES / [ed] Sahmenko, G; Rucevskis, S; Bajare, D, 2015, article id UNSP 012070Conference 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.

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