Potresna analiza poslovne stolpnice Emonika

diplomska naloga

Tomaž Prkič (Author), Matjaž Dolšek (Mentor), Janko Logar (Thesis defence commission member), Jana Šelih (Thesis defence commission member)

Abstract

Keywords

gradbeništvo;diplomska dela;potresna analiza;sistemi;nepovezane stene;ploskovni modeli;linijski modeli;

Data

Language:	Slovenian
Year of publishing:	2010
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[T. Prkič]
UDC:	624.042.7(043.2)
COBISS:	5221985
Views:	1779
Downloads:	423
Average score:	0 (0 votes)
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Other data

Secondary language:	English
Secondary title:	Seismic analysis of Emonika building
Secondary abstract:	The graduation thesis focuses on the seismic analysis of the Emonika building with reinforced concrete structure according to the European Standards Eurocode. In the first part the standards EC1-1-1, EC1-1-3, EC1-1-4 and EC8-1, which were used to define loads that were later on used in the analysis of the building, are described. In the third chapter the investigated building is decribed with emphasis on the structural features, such as the type of structural system, in plan and in elevation regularity and the behaviour factor. In the following chapters the determination of loads, the description of computer modeling and the analysis of the results are presented. The response of the structure was analysed using the models made of shell and beam/column elements or only of beam/column elements. Note that in the first case shell elements were used to model the RC core of the structure, while in the second case it was made of beam/column type elements. From the analysis of the results the applicability of the simplified model made of beam/column type elements in comparison to the more sophisticated model made of shell type elements, has been studied. In addition, the impact of the flexibility of foundation and the impact of columns on the seismic response of the structure is also shown. For this purpose, we have generated three variants of each type of two models. In the analyis of the results of both models it has been concluded that taking the flexibility of the foundation into consideration has a great influence on decreasing of seismic forces and increasing displacements of the structure. We have also concluded that the change of the torsional rigidity only affects the the torsional forces. The rotations and the torsional moments increase, but the seismic forces are not affected by it just as applying the accidental eccentricity. The behavior factor has a reduced influence on the reduction of the seismic forces as in the case of ordinary structures, since the periods of the first two mode shapes have corresponds to the condition Sd ≥ 0,2 ag. The results of the modal analysis with the results of the dynamic analysis were also compared. Practicaly no difference were observed between the results of two analaysis type if presented in terms of displacements, while quite some difference were observed for storey shear forces.
Secondary keywords:	graduation thesis;civil engineering;seismic analysis;business tower;model with line type elements;model with shell type elements;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XXIX, 115 str.
Type (ePrints):	thesis
Title (ePrints):	Seismic Analysis of Emonika Building
Keywords (ePrints):	potresna analiza;sistemi;nepovezane stene;ploskovni modeli;linijski modeli
Keywords (ePrints, secondary language):	seismic analysis;business tower;model with line type elements;model with shell type elements
Abstract (ePrints):	Diplomsko delo obravnava potresno analizo armiranobetonske stolpnice Emonika po evropskih standardih. V prvem delu so predstavljeni standardi EC1-1-1, EC1-1-3, EC1-1-4 in EC8-1, ki so bili uporabljeni za definiranje vplivov na konstrukcijo in za analizo. Sledi opis konstrukcije, določitev nekaterih značilnosti konstrukcijskega sistema, kot so vrsta konstrukcijskega sistema, pravilnost po tlorisu in višini ter faktor obnašanja. V ostalih poglavjih je prikazana določitev vplivov na konstrukcijo, opis modeliranja in analiza rezultatov. Analiza odziva konstrukcije na obravnavane vplive je bila opravljena na modelu iz lupinastih in na modelu iz linijskih elementov. Iz rezultatov analize je ugotovljena smiselnost uporabe poenostavljenega linijskega modela nasproti zahtevnejšemu ploskovnemu modelu. Prikazan je tudi vpliv upoštevanja podajnosti temeljev in vpliv upoštevanja stebrov na potresni odziv konstrukcije. Za ta namen so bili generirani trije modeli iz linijskih in lupinastih elementov. Za primerjavo so bili izdelani tudi trije linijski modeli. Pri analizi rezultatov je bilo pri obeh vrstah modelov ugotovljeno, da ima upoštevanje podajnosti temeljev velik vpliv na zmanjšanje potresnih sil in povečanje pomikov. Sprememba torzijske togosti pri linijskih modelih vpliva le na večjo torzijsko obremenitev. Povečajo se zasuki in torzijski moment ne pa tudi potresne sile, podobno kot pri upoštevanju slučajne ekscentričnosti. Faktor obnašanja ima manjši vpliv na zmanjšanje potresnih sil kot sicer, saj so nihajni časi prvih dveh nihajnih oblik pri projektnem spektru v območju, kjer so spektralni pospeški večji v primerjavi z elastičnim spektrom oz. zaradi pogoja Sd ≥ 0,2 ag niso zmanjšani za polno vrednost q. Rezultate modalne analize smo primerjali z rezultati dinamične analize. Ugotovljeno je bilo, da se pomiki dobro ujemajo, ne pa tudi sile.
Abstract (ePrints, secondary language):	The graduation thesis focuses on the seismic analysis of the Emonika building with reinforced concrete structure according to the European Standards Eurocode. In the first part the standards EC1-1-1, EC1-1-3, EC1-1-4 and EC8-1, which were used to define loads that were later on used in the analysis of the building, are described. In the third chapter the investigated building is decribed with emphasis on the structural features, such as the type of structural system, in plan and in elevation regularity and the behaviour factor. In the following chapters the determination of loads, the description of computer modeling and the analysis of the results are presented. The response of the structure was analysed using the models made of shell and beam/column elements or only of beam/column elements. Note that in the first case shell elements were used to model the RC core of the structure, while in the second case it was made of beam/column type elements. From the analysis of the results the applicability of the simplified model made of beam/column type elements in comparison to the more sophisticated model made of shell type elements, has been studied. In addition, the impact of the flexibility of foundation and the impact of columns on the seismic response of the structure is also shown. For this purpose, we have generated three variants of each type of two models. In the analyis of the results of both models it has been concluded that taking the flexibility of the foundation into consideration has a great influence on decreasing of seismic forces and increasing displacements of the structure. We have also concluded that the change of the torsional rigidity only affects the the torsional forces. The rotations and the torsional moments increase, but the seismic forces are not affected by it just as applying the accidental eccentricity. The behavior factor has a reduced influence on the reduction of the seismic forces as in the case of ordinary structures, since the periods of the first two mode shapes have corresponds to the condition Sd ≥ 0,2 ag. The results of the modal analysis with the results of the dynamic analysis were also compared. Practicaly no difference were observed between the results of two analaysis type if presented in terms of displacements, while quite some difference were observed for storey shear forces.
Keywords (ePrints, secondary language):	seismic analysis;business tower;model with line type elements;model with shell type elements
ID:	8309520