Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Modern load - bearing systems of wooden roofs of engineering buildings |
Sekundarni povzetek: |
This diploma thesis deals with long span load bearing roof systems made of wooden elements. The first part explains the general characteristics of wood. It also describes the mechanical properties and presents their relation to wood type and the direction of loading by means of informational values. This part continues with the presentation of most commonly used fasteners as well as all required elements for proving the load-bearing capacity and specific features of glued laminated timber (glulam).
The second part concentrates on glued laminated timber and describes its production and advantages and weaknesses in comparison to solid wood. It concentrates on particularities that are not connected to the use of solid wood. It analyizes the behaviour of these elements, the types of failure and the characteristics that lead to failure. Modelling of glued laminated elements is analyzed and the models for manual and computer analysis are shown that are continuously perfected. The next theme of this chapter are glues, the choice of which, besides the choice of wood, is of vital importance in the production of glued laminated trusses. The specificities of roof bows are shown, where the influence of the choice of statics system and longitudinal connections on the global stability of the construction is determined.
The third part presents wooden trusses and different forms of roof constructions in relation to the greatest possible span, allowed by each construction. The analysis of most commonly used elements for connecting wooden parts of a truss is made. The development of models of trusses and their optimisation leads to the conclusion that deformations in the truss often result from movements at joints. The diploma thesisr presents other possibilities of using composite construction timber that is not glued laminated timber (glulam), with the intention of increasing the span of wooden load-bearing structures of roofs.
Some examples of wooden load-bearing structures of roofs are presented and the diploma thesis notes that greatest spans are achieved both by trusses and by glued laminated timber, a combination of both or by other composite structures. |
Sekundarne ključne besede: |
graduation thesis;civil engineering;wooden roof systems;glued laminated timber;trusses;great span; |
Vrsta datoteke: |
application/pdf |
Vrsta dela (COBISS): |
Diplomsko delo |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo |
Strani: |
XI, 54 str. |
Vrsta dela (ePrints): |
thesis |
Naslov (ePrints): |
Modern load-bearing systems of wooden roofs of engineering buildings |
Ključne besede (ePrints): |
leseno ostrešje;lepljen lameliran les;paličje;veliki razponi |
Ključne besede (ePrints, sekundarni jezik): |
wooden roof systems;glued laminated timber;trusses;wooden roof systems;glued laminated timber;trusses;great span |
Povzetek (ePrints): |
Diplomsko delo obravnava nosilne sisteme ostrešij z večjimi razponi iz lesenih elementov. Prvi del prikazuje splošne lastnosti lesa. Opišemo tudi mehanske lastnosti in z informativnimi vrednostmi prikažemo njihovo odvisnost od vrste lesa ter smeri obremenjevanja. Predstavimo najpogosteje uporabljena vezna sredstva. V nadaljevanju predstavimo vse potrebno za dokaz nosilnosti in posebnosti za lepljeni lamelirani les. V drugem delu se osredotočimo na lepljeni lamelirani les, opišemo njegovo proizvodnjo ter prednosti in slabosti v primerjavi z masivnim lesom. Posvetimo se posebnostim, ki jih ni pri uporabi masivnega lesa. Podrobneje analiziramo obnašanje takih elementov, vrste porušitve ter lastnosti, ki do njih vodijo. Prikažemo modeliranje lepljenih lameliranih elementov, prikazani so modeli za ročno ter računalniško analizo, ki se vedno izpopolnjujejo. Naslednja tema tega poglavja so lepila, katerih izbira je poleg lesa bistvenega pomena pri lepljenih lameliranih nosilcih. Prikažemo posebnosti strešnih lokov, kjer ugotavljamo, kako izbira statičnega sistema ter vzdolžno spajanje vpliva na globalno stabilnost konstrukcije.
V tretjem delu prikažemo lesena paličja, predstavimo različne oblike strešne konstrukcije v povezavi z možnostjo razpona, ki ga posamezna konstrukcija dopušča. Analiziramo najpogosteje uporabljene elemente za povezovanje lesenih delov paličja. Analiziramo, kako je potekal razvoj modelov paličja in njihova optimizacija in ugotovimo, da deformacije v palični konstrukciji pogosto nastanejo zaradi premikov v vozliščih. Poleg lepljenega lameliranega lesa so predstavljene še druge možnosti uporabe kompozitnega konstrukcijskega lesa v nameri povečevanja razponov lesenih ostrešij.
Prikazani so primeri lesenih ostrešij z največjimi razponi. Ugotavljamo, da se za največje razpone uporabljajo tako paličja kot lepljeni lamelirani les, kombinacija obojega ali druge kompozitne konstrukcije. |
Povzetek (ePrints, sekundarni jezik): |
This diploma thesis deals with long span load bearing roof systems made of wooden elements. The first part explains the general characteristics of wood. It also describes the mechanical properties and presents their relation to wood type and the direction of loading by means of informational values. This part continues with the presentation of most commonly used fasteners as well as all required elements for proving the load-bearing capacity and specific features of glued laminated timber (glulam).
The second part concentrates on glued laminated timber and describes its production and advantages and weaknesses in comparison to solid wood. It concentrates on particularities that are not connected to the use of solid wood. It analyizes the behaviour of these elements, the types of failure and the characteristics that lead to failure. Modelling of glued laminated elements is analyzed and the models for manual and computer analysis are shown that are continuously perfected. The next theme of this chapter are glues, the choice of which, besides the choice of wood, is of vital importance in the production of glued laminated trusses. The specificities of roof bows are shown, where the influence of the choice of statics system and longitudinal connections on the global stability of the construction is determined.
The third part presents wooden trusses and different forms of roof constructions in relation to the greatest possible span, allowed by each construction. The analysis of most commonly used elements for connecting wooden parts of a truss is made. The development of models of trusses and their optimisation leads to the conclusion that deformations in the truss often result from movements at joints. The diploma thesisr presents other possibilities of using composite construction timber that is not glued laminated timber (glulam), with the intention of increasing the span of wooden load-bearing structures of roofs.
Some examples of wooden load-bearing structures of roofs are presented and the diploma thesis notes that greatest spans are achieved both by trusses and by glued laminated timber, a combination of both or by other composite structures. |
Ključne besede (ePrints, sekundarni jezik): |
wooden roof systems;glued laminated timber;trusses;wooden roof systems;glued laminated timber;trusses;great span |
ID: |
8312021 |