Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Lattice shell structures |
Sekundarni povzetek: |
Graduation thesis examines different kinds of lattice shell structures. First we discuss geodesic domes, which are special case of lattice shell structures. For different types of projection onto sphere surface, geometry of geodesic domes is defined, using octahedron or icosahedron as a basic polyhedron. Bar's length and number of bars needed for structure are calculated for different divisions of polyhedron's sides.Solution for joints of metal geodesic dome is presented by using prefabricated elements. Described methods are used for calculation of bar's length for one case of geodesic dome. Some simplifications are also suggested for that case. How to draw geodesic domes and calculate vertex's coordinates in program Mathematica is described. Some kinds of different free form lattice shell structures are shown. Thesis also presents geometrical design of free form sphere dome, grid shell and
geodesic dome which is projected onto ellipsoid's surface. In the end lattice shell structure is analyzed for two load cases: snow load and dead load. Using finite element method linear static analysis, buckling analysis, geometrical nonlinear analysis and modal analysis (structure analysis software SAP2000 is used for analyses) are made. Some basic standardized controls are also made. |
Sekundarne ključne besede: |
graduation thesis;civil engineering;geodesic domes;free form lattice shell structures;grid shell;analysis of lattice shell structures; |
Vrsta datoteke: |
application/pdf |
Vrsta dela (COBISS): |
Diplomsko delo/naloga |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo |
Strani: |
XI, 36 str. |
Vrsta dela (ePrints): |
thesis |
Naslov (ePrints): |
Lattice shell structures |
Ključne besede (ePrints): |
geodezične kupole;poljubno oblikovane palične kupole;palični oboki;račun palične kupole |
Ključne besede (ePrints, sekundarni jezik): |
geodesic domes;free form lattice shell structures;grid shell;analysis of lattice shell structures |
Povzetek (ePrints): |
V diplomski nalogi so obravnavane palične lupinaste konstrukcije. Kot poseben primer paličnih lupinastih konstrukcij najprej pogledamo geodezične kupole. Pokaţemo, kako se določi geometrijo geodezičnih kupol, ki nastanejo iz oktaedra in ikozaedra, pri različnih načinih projekcije na plašč krogle. Za različne delitve stranic poliedra so izračunane dolţine palic ter število potrebnih palic. Predstavljena je rešitev izvedbe stikov za jeklene palice z uporabo prefabriciranih elementov. Opisani postopki določitve geometrije ter stikovanj palic so ilustrirani na primeru, kjer so predlagane tudi poenostavitve, ki jih lahko uporabimo pri načrtovanju. Opisano je, kako se nariše geodezične sfere in izračuna koordinate njihovih vozlišč s pomočjo programa Mathematica. V nadaljevanju naloge pogledamo še druge tipe paličnih lupinastih konstrukcij: geodezično kupolo, ki se jo dobi s projiciranjem na elipsoid, poljubno oblikovane sferične palične kupole in palične oboke. Na koncu izvedemo računsko analizo palične kupole pri obteţbah lastne teţe in snega. Za izbrano jekleno
palično kupolo naredimo z metodo končnih elementov linearno statično analizo, uklonsko analizo, geometrijsko nelinearno analizo in modalno analizo (v ta namen uporabimo program SAP2000) ter osnovne kontrole po standardu. |
Povzetek (ePrints, sekundarni jezik): |
Graduation thesis examines different kinds of lattice shell structures. First we discuss geodesic domes, which are special case of lattice shell structures. For different types of projection onto sphere surface, geometry of geodesic domes is defined, using octahedron or icosahedron as a basic polyhedron. Bar's length and number of bars needed for structure are calculated for different divisions of polyhedron's sides.Solution for joints of metal geodesic dome is presented by using prefabricated elements. Described methods are used for calculation of bar's length for one case of geodesic dome. Some simplifications are also suggested for that case. How to draw geodesic domes and calculate vertex's coordinates in program Mathematica is described. Some kinds of different free form lattice shell structures are shown. Thesis also presents geometrical design of free form sphere dome, grid shell and
geodesic dome which is projected onto ellipsoid's surface. In the end lattice shell structure is analyzed for two load cases: snow load and dead load. Using finite element method linear static analysis, buckling analysis, geometrical nonlinear analysis and modal analysis (structure analysis software SAP2000 is used for analyses) are made. Some basic standardized controls are also made. |
Ključne besede (ePrints, sekundarni jezik): |
geodesic domes;free form lattice shell structures;grid shell;analysis of lattice shell structures |
ID: |
8312926 |