Primerjava rezultatov različnih modelov okvirne konstrukcije pri analizi potresnega vpliva

diplomsko delo univerzitetnega študijskega programa

Janja Roj (Author), Matjaž Skrinar (Mentor)

Abstract

Pri potresni analizi se lahko uporabljajo različni modeli konstrukcij ter različne metode za izračun dinamičnih karakteristik konstrukcij, ki predstavljajo osnovo za analizo potresnega vpliva. Vodilo teh različnih pristopov je želja doseči dovolj dobre približke s čim enostavnejšimi metodami, ki nam prihranijo mnogo časa, še posebej v fazi snovanja konstrukcije. V diplomskem delu se za konstrukcijo, povzeto po strokovni literaturi, primerjajo rezultati različnih računskih pristopov več modelov konstrukcije, ki se razlikujejo po zahtevnosti. Za izračun nihajnega časa se uporabijo: ravninski model (analiziran z izrekom o ohranitvi mehanske energije, enačbo 4.9 iz SIST EN 1998 in dinamično matriko konstrukcije) in prostorninski model (analiziran s 3D pseudo analizo in z metodo končnih elementov z računalniškim programom Sofistik). Zaključek dela predstavlja primerjava dobljenih rezultatov z rezultati iz literature. Primerjava je jasno pokazala, da razlike lahko izvirajo tako iz poenostavitve računskega modela kot tudi iz metode analize. Te ugotovitve niso bile presenetljive, saj se je potrdilo, da ujemanje rezultatov narašča z dvigom kvalitete računskega modela. Hkrati se je izkazalo tudi, da zmanjšanje napake dejansko ni sorazmerno povečanju računskega napora pri uporabi kvalitetnejših modelov. Za obravnavano konstrukcijo, ki je regularna po višini in tlorisu, se je tako izkazalo, da je tudi ravninski model vodil do rezultatov, ki so znotraj sprejemljivih inženirskih meja.

Keywords

potresna analiza;okvirna konstrukcija;izračun nihajnega časa;seismic analysis;frame system construction;vibration period;

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Publisher:	[J. Roj]
UDC:	624.131.55(043.2)
COBISS:	15811862
Views:	2493
Downloads:	208
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Comparison of seismic analysis' results of various frame structure's models
Secondary abstract:	There is a lot od different methods and models used for calculating dynamic characteristics of structures in seismic analysis, that form a base for analysis of seismic influence. The goal is to get enough accurate approximations with easiest methods possible, which save us a lot of time, especially in the design stage. In the diploma work we took a structure from scientific article and compared calculated results, which we got with several methods and models of the structure, which differ in complexity. For the calculation of the vibration period we used planar model (analyzed with the help of the theorem on the conservation of mechanical energy, with equation 4.9 from SIST EN 1998 and with dynamic matrix of structure) and 3D model (analyzed with with 3D pseudo analysis and with finite element method with computer program SOFiSTIK). The completion of the work is comparison of our results with the results of the scientific paper. The comparison showed that the origin of deviations can be simplification of the model as well as the method of analysis. These findings were not surprising, because they confirmed, that the deviation decreases with the rise of the quality of the model. We found out that decrease of deviation is not correlated with growth of mathematical effort, which is needed when using higher quality models. It turned out that planar model of a structure, that is regular in plan view and height, gives results, good enough for the engineering field.
Secondary keywords:	civil engineering;graduate work;seismic analysis;frame system construction;vibration period;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za gradbeništvo
Pages:	XIII, 112 str.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;civil and structural engineering in general;gradbena tehnika;gradbeništvo;substructures;earthworks;foundations;tunnelling;spodnje nosilne konstrukcije (podporne konstrukcije;spodnji ustroji);zemeljska dela (ki so rezultat izkopavanja in nasipanja);temelji;gradnja predorov;
ID:	994637