Analiza prednapetih betonskih plošč na objektu "Emonika"

diplomska naloga

Gregor Novak (Author), Jože Lopatič (Mentor), Bojan Majes (Thesis defence commission member), Roko Žarnić (Thesis defence commission member)

Abstract

Keywords

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

Data

Language:	Slovenian
Year of publishing:	2010
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[G. Novak]
UDC:	624.012.46:624.073(043.2)
COBISS:	5130081
Views:	3290
Downloads:	553
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Analysis of prestressed concrete slabs of the "Emonika" building
Secondary abstract:	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.
Secondary keywords:	civil engineering;graduation thesis;prestressed;prestressed concrete;prestressed slabs;prestressing cables;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XIII, 90 str.
Type (ePrints):	thesis
Title (ePrints):	Analysis of prestressed concrete slabs of the "Emonika" building
Keywords (ePrints):	Prednapetje;prednapeti beton;prednapete plošče;Freyssinet;kabli za prednapenjanje
Keywords (ePrints, secondary language):	Prestressed;prestressed concrete;prestressed slabs;prestressing cables
Abstract (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.
Abstract (ePrints, secondary language):	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.
Keywords (ePrints, secondary language):	Prestressed;prestressed concrete;prestressed slabs;prestressing cables
ID:	8312218