Analiza prednapetih betonskih plošč na objektu "Emonika"

diplomska naloga

Gregor Novak (Avtor), Jože Lopatič (Mentor), Bojan Majes (Član komisije za zagovor), Roko Žarnić (Član komisije za zagovor)

Povzetek

Ključne besede

gradbeništvo;diplomska dela;UNI;prednapetje;prednapeti beton;prednapete plošče;Freyssinet;kabli za prednapenjanje;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2010
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL FGG - Fakulteta za gradbeništvo in geodezijo
Založnik:	[G. Novak]
UDK:	624.012.46:624.073(043.2)
COBISS:	5130081
Št. ogledov:	3290
Št. prenosov:	553
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Analysis of prestressed concrete slabs of the "Emonika" building
Sekundarni povzetek:	The basic purpose of the diploma thesis is to analyze prestressed concrete ceiling slab on "Emonika" building. Few first sentences are describing general characteristic of the prestressed concrete, it’s development through history, basic principles and advantages and disadvantages of the prestressed concrete constructions. Later on, I analyzed different materials and its characteristics, which are a part of the prestressed concrete constructions. Further on, I highlighted the problem of the prestressed concrete constructions, more specifically, the losses of presstressed forces with the substituted influences, appearing at prestressioning the construction. I analyzed prestressed concrete ceiling slab on "Emonika" building in the practical section of the diploma thesis. First, there was determined actual weight on a concrete slab and a length between the lower section of the prestressed cables and the lower section of the concrete slab (cover concrete layer). The prestressed cables influence on the construction is illustrated with the substituted weight, effective at concrete slab, while cables are stressed. That Illustration is made for better understanding of the prestressed cables influence on the construction itself. I also needed to determine prestressed force and prestress process time and later on, the force depression in end time.Prestressed concrete slab was analyzed with Sofistik, computer software. Prior calculated prestressed force losses were taken into account. Some application controls were made, such as: decompression control in final state of the prestressed slab, tension control after cables are being stressed, but before the additional permanent and useful load appears, and also designing works of the prestressed cables anchor positions. Finally, there was calculated also a needed soft reinforcement of the slab.
Sekundarne ključne besede:	civil engineering;graduation thesis;prestressed;prestressed concrete;prestressed slabs;prestressing cables;
Vrsta datoteke:	application/pdf
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Strani:	XIII, 90 str.
Vrsta dela (ePrints):	thesis
Naslov (ePrints):	Analysis of prestressed concrete slabs of the "Emonika" building
Ključne besede (ePrints):	Prednapetje;prednapeti beton;prednapete plošče;Freyssinet;kabli za prednapenjanje
Ključne besede (ePrints, sekundarni jezik):	Prestressed;prestressed concrete;prestressed slabs;prestressing cables
Povzetek (ePrints):	Osnovni namen diplomske naloge je analiza prednapete betonske stropne plošče na objektu »Emonika«. Na začetku sem napisal nekaj besed o splošnih lastnostih prednapetega betona, o zgodovinskem razvoju, osnovnih principih, ter prednostih in slabostih prednapetih betonskih konstrukcij. Kasneje sem analiziral posamezne materiale in njihove lastnosti, ki so sestavni del prednapetih betonskih konstrukcij. V nadaljevanju sem izpostavil problem prednapetih betonskih konstrukcij in sicer izgube sile prednapetja, ter sekundarne vplive ki se pojavijo, ko konstrukcijo prednapnemo. V praktičnem delu diplomske naloge sem analiziral prednapeto betonsko stropno ploščo na objektu »Emonika«. Najprej je bilo potrebno določiti dejansko obteţbo na betonsko ploščo, ter razdaljo med spodnjim robom prednapetih kablov in spodnjim robom betonske plošče (krovni sloj betona). Za laţje razumevanje vpliva prednapetih kablov na konstrukcijo, sem le tega ponazoril z nadomestno obteţbo, ki deluje na betonsko ploščo, ko so kabli napeti. Določiti je bilo potrebno silo prednapetja, ter čas napenjanja. Kasneje pa še padec sile prednapetja v končnem času. Prednapeto betonsko ploščo sem analiziral s programskim paketom Sofistik. Upoštevane so bile prej izračunane izgube sile prednapetja. Narejene so bile posamezne kontrole kot so,kontrola dekompresije v končnem stanju prednapete plošče, kontrola napetosti po napenjanju kablov, vendar pred nastopom dodatne stalne, ter koristne obteţbe, dimenzioniranje sidrišča prednapetih kablov. Za konec je bila izračunana še potrebna mehka armatura plošče.
Povzetek (ePrints, sekundarni jezik):	The basic purpose of the diploma thesis is to analyze prestressed concrete ceiling slab on "Emonika" building. Few first sentences are describing general characteristic of the prestressed concrete, it’s development through history, basic principles and advantages and disadvantages of the prestressed concrete constructions. Later on, I analyzed different materials and its characteristics, which are a part of the prestressed concrete constructions. Further on, I highlighted the problem of the prestressed concrete constructions, more specifically, the losses of presstressed forces with the substituted influences, appearing at prestressioning the construction. I analyzed prestressed concrete ceiling slab on "Emonika" building in the practical section of the diploma thesis. First, there was determined actual weight on a concrete slab and a length between the lower section of the prestressed cables and the lower section of the concrete slab (cover concrete layer). The prestressed cables influence on the construction is illustrated with the substituted weight, effective at concrete slab, while cables are stressed. That Illustration is made for better understanding of the prestressed cables influence on the construction itself. I also needed to determine prestressed force and prestress process time and later on, the force depression in end time.Prestressed concrete slab was analyzed with Sofistik, computer software. Prior calculated prestressed force losses were taken into account. Some application controls were made, such as: decompression control in final state of the prestressed slab, tension control after cables are being stressed, but before the additional permanent and useful load appears, and also designing works of the prestressed cables anchor positions. Finally, there was calculated also a needed soft reinforcement of the slab.
Ključne besede (ePrints, sekundarni jezik):	Prestressed;prestressed concrete;prestressed slabs;prestressing cables
ID:	8312218