Design of spatial aluminium structure

U ovom diplomskom radu izrađen je projekt aluminijske prostorne reš etkaste nadstreš nice koja je tena na ju grada Zagreba. Tlocrtne dimenzije nadstreš nice su 32 m x 48 m, a krovna prostorna etka se zglobno oslanja na etiri razgranata aluminijska stupa visine 10 m. Za nosive elemente konstrukcije predviđena je aluminijska legura EN – AW – 6082 – T6. Uz vlastitu tež inu konstrukcije razmotrena su i sva promjenjiva djelovanja (djelovanje snijega, vjetra, te seizmič ko djelovanje) u skladu s lokacijom građevine. Razmotrena su tri idejna riješ enja u etnoj fazi prorač una (analiza djelovanja te određivanje unutarnjih sila i momenata savijanja), te je od tri rješ enja izabrano optimalno. Varijanta 3 pokazala se kao najbolja u pogledu utroš ka materijala, broja nosivih elemenata, funkcionalnosti natkrivenog prostora i estetike. Nastavak prorač una optimalnog enja a dimenzioniranje konstrukcijskih elemenata prema HRN EN. Uz navedeno, kao primarni fokus ovog rada, provedena je parametarska analiza otpornosti aluminijskih konstrukcijskih elemenata na izvijanje prema HRN EN 1999 – 1 – 1 : 2015 i prEN 1999 – 1 – 1 : 2021. Analizirani su različ iti oblici nih presjeka za ite duljine izvijanja i ite aluminijske legure. Rezultati upuć uju na razlike u otpornosti između dviju verzija Eurokoda 9 koje su posljedica izmijenjenih klasa izvijanja, odnosno novih krivulja izvijanja.This master thesis covers a project of an aluminium spatial lattice canopy located in the Zagreb area. Ground plan dimensions of the canopy are 32 m x 48 m while the roof spatial lattice is supported on four aluminium branched columns, each 10 m high. Aluminium alloy EN – AW – 6082 – T6 is assumed for the load-bearing structural members. In addition to the self–weight of the structure, all variable loads (snow, wind, and seismic action) are considered according to the location of the structure. Three conceptual solutions are considered in the initial phase of the analysis (load analysis and calculationof internal forces and bending moments), and then, the optimal solution was chosen. Third variant proved to be the best in terms of material consumption, number of load-bearing members, functionality of the covered space and aesthetics. Further analysis includes design of structural members according to HRN EN. In addition, as the primary focusof this thesis, a parametric analysis of the aluminium structural members buckling resistance according to HRN EN 1999 – 1 – 1 : 2015 and prEN 1999 – 1 – 1 : 2021 was performed. Different cross-sectional shapes for different buckling lengths and different aluminium alloys were analysed.The results indicate differences in resistance between the two versions of Eurocode 9 as a result of modifiedbuckling classes, i.e., new buckling curves