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PROJEKT MOVE V PODJETJU HOLZCLUSTER STEIERMARK GmbH
Klemen Klemenak, 2009, diplomsko delo

Opis: Holzcluster Steiermark GmbH je bil ustanovljen z namenom združevanja in povezovanja lesnopredelovalnih podjetij v partnerstvo. Podjetje se deli na več oddelkov. Eden od oddelkov je tudi oddelek internacionalizacije Njegova dejavnost je pomoč partnerjem v grozdu za širitev v jugovzhodno Evropo in promocija gradnje z lesom. Projekt MOVE je operacijski program med Slovenijo in Avstrijo, podprt s strani Evropske unije, pri katerem je partner tudi Holzcluster Steiermark GmbH. Holzcluster Steiermark GmbH je k projektu MOVE pristopilo, da bi s svojimi izkušnjami pomagal doseči še boljše rezultate na področju gradenj energijsko varčnih objektov. Sodobna gradnja z lesom velja za najbolj energijsko varčno gradnjo. Preko projekta bomo v podjetju podajali informacije potencialnim investitorjem, da bodo začeli vlagati v takšen način gradnje.
Ključne besede: les, lesena gradnja, nizkoenergetska gradnja, pasivna gradnja, energija, obnovljivi viri energije, učinkovita raba energije.
Objavljeno: 21.12.2009; Ogledov: 2569; Prenosov: 166
.pdf Celotno besedilo (3,48 MB)

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ENERGETSKA ANALIZA OVOJA OBJEKTA Z UPORABO IZBRANEGA 3D PROGRAMSKEGA ORODJA
Marko Koprivnik, 2010, diplomsko delo

Opis: Diplomsko delo obravnava zakonodajne okvire na področju učinkovite rabe energije v stavbah in pristope k preračunu energetske učinkovitosti ovoja stavb s pomočjo računalniških programskih orodij. Predstavili smo ureditev zakonodaje za področje URE, s poudarkom na direktivi EPBD ter pravilniku PURES. Predstavili smo pristope k računanju energetske učinkovitosti ovoja stavb in podrobneje analizirali program ECOTECT. V programu smo uvozili 2D načrte, naredili 3D model objekta ter izvedli preračun toplotnih karakteristik. Na enostavnejšem modelu smo primerjali rezultate programa ECOTECT s programom URSA, kateri je po metodologiji preračuna skladen s pravilnikom PURES.
Ključne besede: učinkovita raba energije (URE), obnovljivi viri energije (OVE), direktiva EPBD, modeliranje objekta, energetska analiza objekta
Objavljeno: 09.12.2010; Ogledov: 2415; Prenosov: 258
.pdf Celotno besedilo (8,50 MB)

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ANALIZA LISTIN V OKVIRU OBNOVLJIVIH VIROV ENERGIJE IN UČINKOVITE RABE ENERGIJE
Nikola Nassif, 2011, diplomsko delo

Opis: Iz leta v leto so večje potrebe po novih virih energije. Glavni razlog je način pridobivanja energije in učinkovitost porabe le te. Energetsko varčevanje je tema, ki postaja iz dneva v dan bolj aktualna. Ozaveščenost ljudi je vedno večja. Naš razvoj stremi k izboljšanju kakovosti življenja in zmanjšanju izkoriščanja naravnih virov. Ti so omejeni in že zelo izčrpani. Za razliko, obnovljivi viri energije ne predstavljajo nobene grožnje naravi, niti niso količinsko omejeni. Razvrednotenje okolja lahko omejimo z varčevanjem z energijo, z izboljšanjem tehnologije in s povečevanjem energetske učinkovitosti. Vendar še tako napredni in učinkoviti izračuni nam ne bodo pomagali, če v prihodnosti ne bomo pridobili strokovnih kadrov in izkušenih ljudi, ki bodo to znanje prenesli v prakso ter nam podali realno stanje v Sloveniji in svetu.
Ključne besede: Obnovljivi viri energije, učinkovita raba energije, listine, knjige..
Objavljeno: 29.09.2011; Ogledov: 1301; Prenosov: 75
.pdf Celotno besedilo (2,36 MB)

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Evaluation of Green`s function for vertical point-load excitation applied to the surface of a semi-infinite elastic medium
Andrej Štrukelj, Tomaž Pliberšek, Andrej Umek, 2006, izvirni znanstveni članek

Opis: The topic of this paper is to show that the integrals of infinite extent representing the surface displacements of a layered half-space loaded by a harmonic, vertical point load can be reduced to integrals with finite integration range. The displacements are first expressed through wave potentials and the Hankel integral transform in the radial coordinate is applied to the governing equations and boundary conditions, leading to the solutions in the transformed domain. After the application of the inverse Hankel transform it is shown that the inversion integrands are symmetric/antimetric in the transformation parameter and that this characteristic is preserved for any number of layers. Based on this fact the infinite inversion integrals are reduced to integrals with finite range by choosing the suitable representation of the Bessel function and use of the fundamental rules of contour integration, permitting simpler analytical or numerical evaluation. A numerical example is presented and the results are compared to those obtained by the CLASSI program.
Ključne besede: civil engineering, soil mechanics, Green`s function, layered half-space, vertical point load
Objavljeno: 31.05.2012; Ogledov: 1247; Prenosov: 6
URL Celotno besedilo (0,00 KB)

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Approximate expressions for the Green's functions of a semi-infinite, elastic medium
Tomaž Pliberšek, Andrej Umek, 2010, izvirni znanstveni članek

Opis: On the basis of an exact, discretized presentation of the Green's function components, their closed-form approximations are developed. Their accuracy is considered to be better than the tolerances in the intrusive measurements data for the identification of the mechanical characteristics of soils. The use of these approximate expressions is believed to considerably reduce the computational effort in soil-structure interaction problems and open up new possibilities for the non-intrusive identification of soils.
Ključne besede: elastodynamics, half-space, Green's function, approximate solutions
Objavljeno: 31.05.2012; Ogledov: 1059; Prenosov: 7
.pdf Celotno besedilo (220,92 KB)

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New finite element for transversely cracked slender beams subjected to transverse loads
Matjaž Skrinar, Tomaž Pliberšek, 2007, izvirni znanstveni članek

Opis: The paper covers the derivation of a new finite element for beams with transverse cracks. The derivation is based on a simplified computational model that has already proved itself suitable for the inverse identification of cracks. The model embodies all the necessary major information about the structure's response from the inverse identification point of view, where the presence and location and, if possible, the depth of the crack should be detected from the measured response, usually dynamic. In such situations the stress distributions obtained from 2D finite elements analysis are not as important as the computational model being capable of reliably describing the displacement of the structure. However, from numerical studies it also became evident that the relevance of the model decreases with element thickness. This indicated that shear forces should be included in the analysis process. Therefore, derivation of a new finite element with the inclusion of shear forces effect has been executed. The stiffness matrix for transversely cracked slender beams, as well as the derivation of interpolation functions is presented and all expressions are given in symbolic forms. The example shows that, although with significantly less computational effort than with 2D FE meshes, significant improvement in transverse displacements can be obtained with the presented beam finite element.
Ključne besede: beams, transverse cracks, computational model, finite element method, transverse displacements
Objavljeno: 01.06.2012; Ogledov: 1016; Prenosov: 8
URL Celotno besedilo (0,00 KB)

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New linear spring stiffness definition for displacement analysis of cracked beam elements
Matjaž Skrinar, Tomaž Pliberšek, 2004, kratki znanstveni prispevek

Opis: The paper describes the reasons for the derivation of a new definition of a rotational spring that can be utilised in the simplified computational model for the computation of transverse displacements of cracked beam structures dueto transverse load. This definition plays an extremely important role in the inverse identification of cracks.
Ključne besede: linear springs, rotational spring, displacement analysis, transverse displacements, cracked beam structures, transverse load, inverse problems, transverse displacements, inverse identification of cracks
Objavljeno: 01.06.2012; Ogledov: 1031; Prenosov: 14
URL Celotno besedilo (0,00 KB)

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Green's function for an elastic layer loaded harmonically on its surface
Tomaž Pliberšek, Andrej Štrukelj, Andrej Umek, 2005, izvirni znanstveni članek

Opis: The Green's function in surface displacement plays an important role in soil structure interaction. In evaluating the Green's function, several difficulties occur because it is formulated in the infinite integral form. This paper outlines a method of analyzing the steady-state dynamic response of an elastic layer subjected to general point load excitation. It is assumed that the load is applied at the surface. The application Hankel integral transform, to the governing differential equations and boundary conditions yields the response displacements at the surface in integral representation. It will be shown that these semi-infinite integrals can be reduced to the integral with the finite range of integration, which can be efficiently taken numerically. The numerical results are presented, which show the efficiency of the developed procedure.
Ključne besede: civil engineering, geomechanics, soil-structure interaction, layered halfspace, Green's function, elastodynamics
Objavljeno: 15.05.2018; Ogledov: 105; Prenosov: 2
.pdf Celotno besedilo (375,59 KB)

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