1. Assessment of in-plane timber floor stiffness as structural diaphragms: a numerical approach to lateral load responseJelena Vilotijević, Miroslav Premrov, 2024, izvirni znanstveni članek Opis: The behaviour of horizontal floor diaphragms plays a crucial role in ensuring the overall response of a building during earthquakes, as the stiffness of these diaphragms determines whether the structure will act as an integrated system. If the diaphragms do not exhibit sufficient stiffness, differences in the redistribution of forces on wall elements arise, increasing the risk of significant deformations and even local damage, which is commonly observed in earthquake-affected areas. Additionally, flexible diaphragms heighten the risk of torsional effects. Due to these factors, more attention should be given to the response of buildings with flexible diaphragms. Eurocode standard specifies general requirements under which diaphragms should be considered rigid within their plane, depending on the maximum diaphragm moment. However, specific guidelines regarding the geometric and material properties of elements that significantly impact seismic behaviour are not included in the existing European standards. This served as a basis for conducting a numerical study analysing the in-plane behaviour of floor elements made from different materials. This study, limited to a simple box-shaped structure with masonry walls, symmetrical in both orthogonal directions, evaluated and thoroughly analysed the deformations for different types of diaphragms, including prefabricated wooden frame-panel floors, CLT panels, and reinforced concrete slabs. Special emphasis was placed on wooden structural elements due to the increased demand for timber construction, as the behaviour of these elements needs to be properly studied, especially in seismic regions. The study results were obtained through FEM analysis using the SCIA Engineer software, version 22. The modelling of elements was carried out considering the orthotropy of brick wall and wooden ceiling elements, as well as simulating the appropriate shear stiffness of the connecting means.
Ključne besede: horizontal diaphragms, floor flexibility, lateral load resisting system, timber frame-panel floor, cross-laminated timber, concrete slab, seismic design
Objavljeno v DKUM: 10.01.2025; Ogledov: 0; Prenosov: 6
 Celotno besedilo (8,44 MB)
Gradivo ima več datotek! Več... |
2. Statična in dinamična analiza nadvišanja stanovanjskega bloka z okvirno panelnim sistemom : magistrsko deloJurij Zemljič, 2024, magistrsko delo Opis: Zaradi vedno večjega vpliva urbanizacije in strnjevanja ljudi v mestih pride do velikega problema pomanjkanja stanovanj oz. pomanjkanja prostora za gradnjo. Eden izmed načinov obvladovanja širitve mest so nadvišanja obstoječih stavb, ki je prav tako ena izmed ekonomično in okoljsko najbolj ugodnih rešitev.
Naloga obsega analizo obtežb, statično in dinamično analizo, ter dimenzioniranje nadvišanj dveh etaž obstoječe delno-podkletene 3-etažne (K+P+1N+2N+3N) stanovanjske stavbe locirane v Ljubljani, natančneje v Zalogu.
Pri obstoječi stavbi gre za masivno betonsko gradnjo. V magistrski nalogi sem se osredotočil na statično in dinamično analizo izvedbe nadvišanj obstoječe stavbe za dve etaži. Pri sistemu nadvišanj sem se odločil za okvirno panelne module, zaradi same teže oz. vitkosti sistema, s katerimi bistveno ne vplivamo na obstoječo konstrukcijo.
Ključne besede: gradbeništvo, leseni modul, dimenzioniranje, stanovanjski blok, okvirno panelni sistem
Objavljeno v DKUM: 02.09.2024; Ogledov: 70; Prenosov: 42
Celotno besedilo (11,08 MB) |
3. Primerjava potresne analize zidane stavbe z linearno elastičnim in nelinearnim modelom v programih Tower 8 in SCIA Engineer 21 : magistrsko deloDubravko Andrašek, 2024, magistrsko delo Opis: Magistrsko delo se osredotoča predvsem na primerjalno potresno analizo zidane stavbe z linearno in nelinearno analizo. Potresna naliza je bila izvedena s programsko opremo Tower 8 in SCIA Engineer 21. Parametri, ki smo jih primerjali, vključujejo potek notranjih statičnih obremenitev, skupne pomike in togost celotne konstrukcije. Pomembno je omeniti, da so bili rezultati primerjani le za določene stene. Ugotovili smo, da Tower 8 pokaže padec notranjih statičnih obremenitev pri stiku navpičnih nosilnih elementov, medtem ko smo s programsko opremo SCIA Enginee 21r dobili bolj kritične rezultate. Prav tako smo opazili, da Tower 8 ne omogoča izvedbe nelinearne analize za ploskovne elemente. SCIA Engineer 21 omogoča nelinearno analizo, vendar le z uporabo kvazistatičnega pristopa, ki prinaša bistveno bolj kritične rezultate. Dodatno smo z linearno analizo v programskem paketu Tower 8 primerjali rezultate potresne analize na dveh dodatnih modelih. Prvi model je upošteval parapete in preklade pri modeliranju, medtem ko je drugi model vključeval zmanjšano vrednost modula elastičnosti.
Ključne besede: potresna analiza, Tower 8, SCIA Engineer 21, linearna analiza, nelinearna analiza, zidana stavba
Objavljeno v DKUM: 30.05.2024; Ogledov: 193; Prenosov: 97
Celotno besedilo (9,83 MB) |
4. |
