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Title:Nadgradnje obstoječih stavb z lahkimi lesenimi konstrukcijami s stališča potresne odpornosti
Authors:Jančar, Jurij (Author)
Premrov, Miroslav (Mentor) More about this mentor... New window
Files:.pdf DOK_Jancar_Jurij_2016.pdf (9,58 MB)
MD5: 438454B719F82585E0BE867D997A4402
 
Language:Slovenian
Work type:Dissertation (m)
Typology:2.08 - Doctoral Dissertation
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:Pomanjkanje novih zazidalnih površin, visoki stroški novogradenj ter razvoj novih lahkih sistemov gradnje so glavni razlogi, ki ljudi usmerjajo k nadgradnji objektov. Moderne lesene gradnje, kot sta sistem križno lepljenih plošč ter lesen okviren sistem, odlikujejo majhna masa, visoka stopnja prefabrikacije, hitra in razmeroma nemoteča montaža ter linijski prenos obremenitev, kar jih uvršča med najprimernejše materiale za nadgradnje. V disertaciji je problem nadgradenj obdelan z vidika potresne odpornosti konstrukcij in vpliva nadgradenj na obstoječe konstrukcije, ki je preučen z obsežno parametrično študijo vpliva spreminjanja togosti in etažnosti nadgradenj na seizmične obremenitve. Prikazane so možnosti enostavnega spreminjanja togosti lesenih stenskih panelov, ki so za lesen okviren sistem izračunane na podlagi priporočil, za križno lepljen sistem pa je predstavljen nov postopek izračuna. Rezultati študije prikazujejo, da ima lahko togost nadgradnje velik vpliv na seizmične obremenitve in da je v določenih primeri, kljub manjšemu povečanju mase zaradi nadgradnje možen ugoden vpliv nadgradnje, na potresno odpornost objekta.
Keywords:nadgradnja, obstoječa konstrukcija, lahke lesene konstrukcije, križno lepljen les, lesen okviren sistem, seizmične obremenitve, parametrična študija
Year of publishing:2016
Publisher:[J. Jančar]
Source:Maribor
UDC:624.011.1+699.841(043.3)
COBISS_ID:286271744 New window
NUK URN:URN:SI:UM:DK:8EIFBHEK
Views:1797
Downloads:195
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Categories:KTFMB - FG
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Secondary language

Language:English
Title:Seismic resistance of existing buildings with added light timber structure stories
Abstract:Lack of new building area, high costs of new construction and developement of new lightweigh construction systems are the reasons people decide to add additional stories to existing buildings. Modern timber systems, like cross laminated timber and light timber frame system, are very light, they can be assembled quickly due to high level of prefabrication and have a possibility of distributed load transfer, which makes them the most suited materials for vertical expansions. In thesis the problem of vertical expansions is treated in terms of seismic resistance of structures with added stories. An extensive parametric study is performed showing the impact of changing number of added stories and variation of their stiffness to seismic response of structures. Examples how stiffness in light timber frame and CLT structures can be easily changed just by changing the type and distribution of fasteners are shown. For light timber frame system stiffness of wall elements is calculated based on known procedures and for determining the stiffness of CLT wall elements a new procedure is given. Parametric study shows how changing stiffness of the vertical expansion can have a significant effect on seismic forces and that in some cases vertical expansion can have a favorable effect on seismic resistance despite minor increase of mass of the structure.
Keywords:vertical expansion, existing building, light timber structures, cross laminated timber, light timber frame, seimic loads, parametric study


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