diplomska naloga
Uroš Gantar (Author), Matjaž Dolšek (Mentor), Janko Logar (Thesis defence commission member)

Abstract

V diplomski nalogi obravnavamo klasično zidan stanovanjski blok zgrajen v 60. letih prejšnjega stoletja v Škofji Loki. V prvem delu predstavimo obnašanje zidanih konstrukcij, ki so izpostavljene potresni obtežbi. Obravnavamo teoretično ozadje za tri možne mehanizme porušitve zidu, iz katerih določimo nosilnost posameznih elementov: strižna porušitev z nastankom diagonalnih razpok, strižna porušitev z zdrsom in upogibna porušitev. Nato predstavimo metodo za določitev projektne potresne obtežbe, na koncu pa pojasnimo osnove poenostavljene nelinearne potisne analize. Drugi del naloge obsega oceno potresne odpornosti dejanskega zidanega objekta. Predpostavili smo nihanje objekta v osnovni nihajni obliki in določili potresne sile po metodi s horizontalnimi silami. Materialne karakteristike smo določili deloma iz projektne dokumentacije in deloma z upoštevanjem določil iz standarda Evrokod. Pri oceni potresne odpornosti smo se omejili na zidove v pritličju, ki so najbolj ranljivi v primeru potresa. V analizi smo predpostavili, da je betonska klet bistveno bolj toga od opečnih zidov nad kletjo. Z izračuni za nearmirano zidovje v skladu z Evrokodoma 6 in 8 smo ocenili, da objekt dosega potrebno potresno varnost v vzdolžni smeri, v prečni smeri pa ne. Ugotovitve iz elastične analize smo potrdili s poenostavljeno nelinearno potisno analizo. Naredili smo tudi kratko primerjavo med projektiranjem po trenutno veljavnih standardih Evrokod in predpisi iz časa projektiranja, takrat je bil v veljavi jugoslovanski predpis iz leta 1964, torej obdobja po močnem potresu v Skopju. Pri primerjavi potresne sile dobljene po takratnih in trenutno veljavnih standardih smo ugotovili, da se bile zahteve v standardih JUS precej blažje, saj je projektna potresna sila dobljena po trenutno veljavnih standardih Evrokod 2,5 krat večja.

Keywords

gradbeništvo;diplomska naloga;UNI;B-GR;ocena potresne odpornosti;zidan objekt;nosilnost z nastankom diagonalnih razpok;upogibna nosilnost;striţna nosilnost na zdrs;metoda s horizontalnimi silami;potisna analiza;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: U. Gantar
UDC: 624.04:728(497.4)(043.2)
COBISS: 6772833 Link will open in a new window
Views: 2132
Downloads: 760
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Other data

Secondary language: English
Secondary title: Evaluation of earthquake resistance of masonry apartment building
Secondary abstract: The thesis addresses the earthquake resistance of the typical masonry apartment building constructed in the 1960s in Škofja Loka. In the first part the seismic response of masonry buildings is presented. Explained are the models of three possible masonry wall failure mechanisms, which are the basis for determining the capacity of single walls taking into account the shear failure due to formation of diagonal cracks, the sliding shear failure and the flexural failure. The definition of the design seismic action and fundamentals of the pushover analysis follow. The second part of the thesis deals with performance assessment of masonry building in Škofja Loka. The seismic demand is firstly assessed by using the lateral force method. Material characteristics were defined according to design project with consideration of provisions of Eurocode standard. Only ground floor is included in seismic performance assessment since it is the most vulnerable. The effects of the concrete basement were neglected in the analysis. The results of the analysis according to Eurocode 6 and 8 have shown that the building meets safety requirements in longitudinal direction, but not in the case of transverse direction. Conclusions on the basis of elastic analysis were confirmed by simplified nonlinear pushover analysis. At the last part of the thesis a comparison between design seismic action according to standard Eurocodes and regulations from 1964, which were the consequence of the catastrophic Skopje Eartquake, are presented. It was found that Eurocode provided the 2,5 times greater design seismic action.
Secondary keywords: seismic performance assessment;masonry building;resistance due to formation of diagonal cracks;flexural resistance;sliding shear method;lateral force method;pushover analysis;
File type: application/pdf
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: X, 35 str., 28 pril.
ID: 8708233