In this paper the basic solutions of the steel elements of the bridge over Farris lake are presented. The bridge is 569 m long with main span 120 m. Main span is made of composite cross-section supported by stay-cables. The distance between stay-cables is 16,5 m. Final design solutions of longitudinal girders, primary transverse girders and brackets connecting two transverse girders are given. At the end of the bracket the cables are attached. The longitudinal girders are made of thin plates and stiffened with trapezoidal longitudinal stiffeners. Also the web of the transverse girder is made of thin plate and it was stiffened only in the area of wholes. The design was done in accordance to Eurocode EN 1993 standards. Due to complex geometry of some elements the design of those was done also using more sophisticated analysis in ABAQUS software. The project client was Norwegian company Ramboll (http://www.ramboll.com/projects/group/farris-bridge-e18).
F.34 Consultancy
COBISS.SI-ID: 6146913The heavy fuel tank with diameter of 53.4 m was damaged during a fire. The plan of reconstruction was to weld the stiffeners on the damaged part of the tank. Due to the change in stiffness, cause by the stiffeners, the low cycle fatigue was put under consideration. The low-cycle fatigue could be present due to yielding in the initial and further filling of the tank. The damaged (deformed) geometry of the tank was considered in our advanced numerical model. The model gave a very well estimation of the deformation state after the first filling of the tank. Our advanced analysis and state of the art knowledge saved resources and time for the reconstruction of the tank, if compared to the standard solution.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 6312289The steel tank B 8400 with the volume 500 m3 is intended for the storage of water. The shape of the tank is cylindrical with the inner radius 4000 mm, height 9795 mm and constant wall thickness 6 mm. The tank is covered with the self-supported cone steel roof with the inclination of 20° and with the thickness of 7 mm welded to the top ring stiffener. Due to specific conditions of the tank final location, the water tank B 8400 was fabricated 30 m away from its final position and then relocated with the help of a crane without any additional supports of the tank roof. To check the proper attachment of lifting equipment and to check the response of the tank during lifting, FE numerical simulation (software tool ABAQUS) was performed in two stages. In the first stage the reservoir was lifted and in the second stage it was placed on the foundation inclined by 2% to the bottom of the tank. Such fabrication with the tank relocation was economically the most efficient and the fastest. The safety of the relocation was proven in the project by a complex and demanding calculation.
F.09 Development of a new technological process or technology
COBISS.SI-ID: 5710177The client, ArceloMittal, put a new product on the market – biggest hot rolled angle profiles and wanted to obtain information on the buckling resistance of structural elements made of such angles. This paper presents the methodology and procedure of residual stresses measurement in the large angle profiles. The results of the measurements as well as the definition of the general distribution of residual stress in the cross-section are presented. The general distribution represents a kind of unfavorable envelope of the measurements in the range of standard deviation that is the input data for the numerical parametric, geometrical and material nonlinear, analysis, the results of which are the buckling curves for angle profiles. The results show that the results of this study give more favourable results than the European standard EN 1993-1-1 and the corresponding improvements will be proposed.
F.06 Development of a new product
COBISS.SI-ID: 6147681