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Hygrothermal analysis of massive wooden structures
Uherka, Pavel ; Šuhajda, Karel (referee) ; Žák, Antonín (advisor)
This thesis deals with massive wooden buildings especially with regard to the current approach to their design, assessment and approval. In this thesis are shown future possibilities of development of traditional wooden buildings with regard to current thermal technical requirements. Theoretical considerations are then compared with measurements which were performed on massive wooden wall samples.
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Temperature-moisture Assessment of Members in Truss with Above-rafter Thermal Insulation
Soudek, Pavel ; Vlach, František (referee) ; Kalousek, Lubor (advisor)
This thesis deals with the temperature-moisture assessment of members in truss with above-rafter thermal insulation. Within this system it focuses on the details of creating a roof overhang because that is where the timber elements are under the greatest amount of moisture stress. Different variations of this detail are presented including the extent to which thermo-technical requirements and requirements surrounding the built-in timber elements are satisfied. Theoretical calculations are then compared with measurements which were performed on a real building. This task of measurement involved developing a new measuring device. The development of this device is also described in this paper.
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Vliv doby a teploty paření na pružnostní a pevnostní charakteristiky dřeva buku
Jakeš, Ondřej
This diploma thesis primarily focuses on thermal modification of wood with superheated steam and its effect on elasticity and strength. The sample tested was 200 pcs of bending samples and 200 pcs compressive samples of European beech. These samples were divided into ten groups. One group was referential and the remaining nine groups were modified using different temperatures and during different time intervals. The main goal was to determine density, modulus of elasticity and rupture and to discover their dependence on the chosen mode of modification. The next part contains the analysis of the effect of thermal modification with superheated steam on the acoustic properties and the colour of wood. In the last part, the mass loss and the change in equilibrium moisture content was analysed in relation to the modification mode.
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Hodnocení vybraných elektrických vlhkoměrů při měření vlhkosti dřeva
Piňos, Pavel
This bachelor thesis focuses on detecting a range of humidity, in which selected electric hygrometers measure reliably and also an appropriateness of its use for measuring moisture of wood. The thesis is divided into two main parts which are a realization of the experiment and a statistic comparison and evaluation of measured data. The measuring of moisture was realized using four different types of hygrometers and then it was compared with the real (computed gravimetricaly) moisture of wood. The testing was realized on spruce samples. The next target was determining an effect of a density of wood on its real moisture. For demonstrating reliability of measuring moisture of selected hygrometers, samples were tested during five humidity conditions.
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Hygrothermal analysis of massive wooden structures
Uherka, Pavel ; Šuhajda, Karel (referee) ; Žák, Antonín (advisor)
This thesis deals with massive wooden buildings especially with regard to the current approach to their design, assessment and approval. In this thesis are shown future possibilities of development of traditional wooden buildings with regard to current thermal technical requirements. Theoretical considerations are then compared with measurements which were performed on massive wooden wall samples.
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Temperature-moisture Assessment of Members in Truss with Above-rafter Thermal Insulation
Soudek, Pavel ; Vlach, František (referee) ; Kalousek, Lubor (advisor)
This thesis deals with the temperature-moisture assessment of members in truss with above-rafter thermal insulation. Within this system it focuses on the details of creating a roof overhang because that is where the timber elements are under the greatest amount of moisture stress. Different variations of this detail are presented including the extent to which thermo-technical requirements and requirements surrounding the built-in timber elements are satisfied. Theoretical calculations are then compared with measurements which were performed on a real building. This task of measurement involved developing a new measuring device. The development of this device is also described in this paper.
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