Metal Work Used in Timber Engineering

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.

Ocelové spoje dřevěných konstrukcí : Steel connections of timber structures

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

Optimalizace tenkostěnných ocelových plechů kování : Thin-walled steel elements optimization

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.

Navrhování prostorových přípojů dřevostaveb za pomoci kování

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

Metal Work Used in Timber Engineering

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.

Design of Three-Dimensional Nailing Plates

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

Metal work used in timber engineering

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.It is a content of DVD in the book of Abstracts:SEJKOT, P. a KUKLÍK, P. Metal Work Used in Timber Engineering. In: SALENKOVICH, A., ed. WCTE 2014 Book of Abstracts Volume II. The 2014 World Conference on Timber Engineering. Quebec City, 10.08.2014 - 14.08.2014. Quebec: Universite Laval. 2014, s. 51-52. ISBN 978-0-86488-560-9.</p

Teretron : první SPIN-OFF projekt univerzitního centra UCEEB

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.

Numerical and experimental study of punched metal plate connection used for long-span pitched timber roof truss structure

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