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The objective of the research is a steel fiber‐reinforced concrete slab in compression in a composite frame joint. EN 1998‐1 relates only to composite joints with common concrete slab. This standard prescribes two mechanisms: mechanism 1 acts in the concrete slab with a concentrated compressive force on the column flange; mechanism 2 consists of struts and tie model, where concrete struts compress the concave parts of the column cross‐section. By these mechanisms, it is prescribed inaccurate formula for the effective width calculation of a common concrete slab in compression in the nodal zone, as the standard procedure does not consider the contribution of the confinement effect to the resistance of mechanism 1. Mechanism 1 represents a direct bearing of the concrete slab against the column flange. There is a concrete slab in compression confined by transverse reinforcement, slab continuity around the column flange and friction on the column flange. Moreover, some publications describe different inclination of the concrete struts of mechanism 2. The resistance of mechanism 2 significantly depends on this inclination. The aim of this work is to derive a more accurate formula for calculation the effective width of the steel fiber‐reinforced concrete slab in compression in the nodal zone. Experiment with real‐sized isolated composite joint, validation of ATENA numerical models and parametric study of composite joints with fiber‐reinforced concrete slab are the main steps of this research.

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Abstract:The objective of this article is to show the design process of a liquid-storage tank shell according to Eurocode and compare the results obtained using the norms with those from a finite element method (FEM) analysis. The calculations were performed for an aboveground vertical steel water-storage tank with a variable thickness wall and stiffening ring on top. First, the types of liquid storage tanks are briefly explained. Second, the given tank is described. Third, an analysis of the tank wall according to the Eurocode was carried out. The FEM analysis was performed using the Scia Engineer ver. 17 software. Finally, all the results are presented in tables and compared.Keywords: shells; modeling; steel-structure; earthquake; buckling PRORAČUN SPREMNIKA ZA TEKUĆINE: USPOREDBA REZULTATA RAČUNALNOG MODELA I ANALIZE PREMA EURONORMI Sažetak: Svrha ovoga članka je prikazati postupak proračuna plašta spremnika za tekućine prema euronormi, te tako dobivene rezultate usporediti s rezultatima računalnog modela. Primjer na kojemu je napravljena usporedba je nadzemni čelični spremnik za vodu sa stijenkom promjenjive debljine i ukrutnim prstenom na vrhu. Najprije su ukratko predstavljeni tipovi spremnika za tekućine, zatim je opisan spremnik na kojemu je izvršena analiza, a potom je proveden proračun stijenke spremnika prema euronormi. Analiza metodom konačnih elemenata odrađena je na numeričkom modelu, koristeći programski paket Scia Engineer 17. Na kraju su tablično prezentirani i uspoređeni rezultati obje analize.