Analiza obstoječe lesene konstrukcije z evrokod sistemom : diplomsko delo - univerzitetni študij

Vesel, Miha (author), Bučar, Bojan (mentor), Medič, Marijan (reviewer)

Naredili smo statični in trdnostni izračun lesenega ostrešja, grajenega iz smrekovine. Predstavili smo trdnostne razrede ter osnovne trdnostne lastnosti lesa, pomembne pri projektiranju lesenih konstrukcij. Osnova za izračun je bilo trikotno vešalo na katerega so bili pritrjeni špirovci. Preverili smo dimenzije posameznih nosilnih konstrukcijskih elementov ob upoštevanju obremenitev, kot jih predvideva EVROKOD standard (lastna teža, koristna obtežba, obtežba snega, obtežba vetra). Notranje napetosti ter deformacije v nosilnih elementih so bile pridobljene z računalniškim programom TOWER 6.0 DEMO ob upoštevanju vplivov na konstrukcijo po EVROKOD metodologiji. Dimenzioniranje je temeljilo na metodi mejnega stanja nosilnosti (MSN), ter na metodi mejnega stanja uporabnosti (MSU). Sama analiza je pokazala, da je konstrukcija konstruirana varno, vendar z vidika porabe materiala zelo potratno. Pri sami analizi smo ugotovili, da potrebujemo les, ki je razvrščen v trdnostne razrede. Zaradi kompleksnosti EVROKOD sistema pa je nujna uporaba sodobnih računskih pripomočkov ter računalniških programov. Treba pa je tudi vsebinsko poznati še vrsto drugih standardov, vezanih na EVROKOD.

• Language: Slovenian
• Keywords: lesene konstrukcije, analiza, evrokod, dimenzioniranje
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [M. Vesel]
• Year: 2011
• Number of pages: XI, 100 f.
• PID: 20.500.12556/RUL-592
• UDC: 694:006.77
• COBISS.SI-ID: 1937289
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English
• Title: Analysis of existing wooden structures with Eurocode system : graduation thesis - university studies

Abstract

Thesis presents the calculation of static and strength of a wooden roof, built of spruce wood. The basic strength properties of wood and strength classes, important for the design of timber structures, are presented. The basis for the calculation is the triangular king post truss with rafters being attached to it. The dimensions of individual structural elements bearing the load, are verified as foreseen by Eurocode standard (dead load, live load, snow load, wind load). Internal voltage and deformations of load-bearing elements are generated by TOWER 6.0 DEMO computer programme, considering impacts on the structure by Eurocode methodology. Dimensioning is based on the method of limit state load (MSN) and the method of the marginal status utility (MSU). Analysis itself shows that the structure is constructed safely, but in terms of consumption of material very wastefully. In the analysis it was found that we needed a timber classified in the strength classes. Because of complexity of Eurocode system it is necessary to use modern computing devices and computer programmes. It is also necessary to know a number of other standards, related to Eurocodes.

• Keywords: timber structures, analysis, Eurocode, dimensioning