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Fasadna konstrukcija iz mreže kablov za jekleni stolp za shranjevanje energije v Heidelbergu : magistrsko delo
Pergarec, Samo (Author), Brank, Boštjan (Mentor) More about this mentor... This link opens in a new window, Stockhusen, Knut (Co-mentor)

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Abstract
Glavna tematika naloge so prednapete kabelske mreže. V osnovi je delo razdeljeno na dva segmenta. V prvem so obravnavane teoretične osnove lahkih prednapetih konstrukcij (prednapetih membran in kabelskih mrež) ter principi njihovega delovanja. Natezne konstrukcije so nato klasificirane glede na njihovo Gaussovo ukrivljenost. Prikazan je pomemben pojem dvojne ukrivljenosti (antiklastična geometrija). V procesu projektiranja je faza iskanja oblike (ang. form-finding) zelo pomembna. Trije načini iskanja optimalne geometrije nateznih konstrukcij so opisani bolj podrobno (dinamična relaksacija, metoda prehodne togosti in metoda gostote sil). Obravnavan je tudi enostaven primer iskanja oblike hiperboloidne kabelske mreže v programskem okolju Rhinoceros z vtičnikoma Grasshopper in Kangaroo. Na koncu prvega dela je predstavljen še projektantski biro schlaich bergermann partner iz Stuttgarta, kjer je avtor eno leto preživel na praktičnem usposabljanju. V drugem delu je obravnavan projekt prednapete kabelske fasadne konstrukcije stolpa za shranjevanje energije pod imenom Energie- und Zukunftsspeicher Heidelberg (slov. Energijski hranilnik prihodnosti Heidelberg). Avtor je na projektu sodeloval v fazi začetnih študij izvedljivosti ter projektiranja. Opisani so glavni sestavni deli konstrukcijskega sistema – jeklena krona na vrhu, spiralni nosilec, ki se vije okoli stolpa, ter kabelska fasada, napeta med krono in tlemi. Na kratko je obravnavano iskanje oblike. Nato so predstavljeni vsi obtežni primeri in obtežne kombinacije. Posebnosti, na katere je potrebno paziti pri projektiranju tovrstnih konstrukcij, so npr. lezenje kablov zaradi visokih nateznih sil, deformacije mreže ob zunanjih obtežbah, minimizacija števila kablov, ki bi utegnili postati razbremenjeni, ipd. Za konec je predstavljenih še nekaj detajlov, kot so npr. vpetje kablov v beton, kabelske objemke, fasadni paneli.

Language:English
Keywords:lahke konstrukcije, iskanje oblike, kabli, mreže kablov, prednapetje, fasade, Rhinoceros, Grasshopper
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2018
Publisher:[S. Pergarec]
UDC:624.07:692.232(043.3)
COBISS.SI-ID:8325729 Link is opened in a new window
Views:727
Downloads:717
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Secondary language

Language:Slovenian
Title:Cable net façade structure of an energy storage steel tower in Heidelberg : master's thesis
Abstract:
The central subject of the thesis is prestressed cable nets. The report is divided into two fundamental segments. The first one focuses on the theoretical essentials of lightweight tensile structures (prestressed membranes and cable nets). It explores how they work by explaining the important principle of double curvature (anticlastic surfaces) and the concept of Gaussian curvature for classification of curved surfaces. The form-finding design phase is of great importance. Three types of form-finding are mathematically described (dynamic relaxation, transient stiffness method and force density method). Software Rhinoceros with plugins Grasshopper and Kangaroo is used in a simple form-finding example of a hyperboloid cable net. Lastly, the engineering office schlaich bergermann partner from Stuttgart, where the author has finished a one-year internship, is presented. The second segment contains the project of a prestressed cable net facade, enveloping a hot water storage cylinder. The project's designation is Energie- und Zukunftsspeicher Heidelberg (eng. Energy storage tank of the future, Heidelberg). The author has participated in the project's feasibility studies phase and in the initial structural design of the cable net. The structural system is described (the steel crown on top, the helix beam, spiraling around the storage tank, and the cable net facade, spanning between the crown and the ground). The form-finding phase, load cases and load combinations are presented. Certain specialties concerning the design of such structures are considered and described – cable creep, cable net deformations, minimising the number of slack cables, etc. Lastly, a few details are presented (interface between the cables and the concrete, cable clamps, facade panels).

Keywords:lightweight structures, form-finding, cables, cable nets, prestress, façades, Rhinoceros, Grasshopper

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