145 Hockeyball hall Macharova Street Bratislava Technical data of the project: This project contains the static of a 153t heavy steel structure (S235) for the Hall of the Hockey-hall in Bratislava – Slovakia, where the steel structure will be mounted from January to September 2007. The total length of this object is 57,0 m, the width is 33,8 m, the area is 2000 m² and the volume is more than 20,000 m³. The building costs are 1,000,000 Euro. Description of the steel structure The steel structure of the object of the hall has 11 modules A-K of transversal stiffened frames consisting of rolled profiles between which the axial distance is 6.00m, while between the rows E-F a half modulus 3.00 m is inserted, so that the overall length of the hall will be 9 x 6.00 + 3.00 = 57.00 m. The transversal joints have an axis span of 33,80 m, while on the main columns there are mounted stiffened beams with their lower edges at the height of 8.20 m. The supporting structure of the hall is made of a steel structure, consisting of vertical rolled columns HEA 500, stiffened cross beams and longitudinal rolled beams HEA 180 with transversal as well as longitudinal stiffening in horizontal and vertical planes. On the supporting steel elements there are externally affixed sandwich panels of a planar weight of 30 kg/m² protecting the hall from windy and precipitation influences of weather. On the lower strip of the stiffened beam, illuminators of a maximal weight of 5 kg/m² will be hanged. Description of the parts of the steel structure The primary supporting system of the object was taken in the static calculation as one special unit. The steel columns, consisting of profiles HEA 500, have a height of 11,000 mm on the higher side of the countertype of roof and 9200 mm on the lower side. On the columns there are inserted beams, strip bars, perpendiculars and diagonals, which have been designed of double angle- irons of various dimensions. The upper strips longitudinal beams, made of profiles HEA 180, are welded. They are statically taken as simple beams, on which sandwich panels of the roof are inserted. All stiffening elements of the object are bars of the supporting system, i.e. they are designed in the longitudinal as well as the transversal direction, in the roof plane from L- profiles against each other and in the crossings they are welded. Two bars are always crossed “X” shaped, while the drawn bar is only statically effective (the compressed one is eliminated from supporting due to bulge). Stiffeners in the perpendicular direction must equip the bars, to which the stiffening is connected. The connection to the columns and beams is made through steel sheet flanges and bolts. The floor beams are made of open- section rolled steel beams. The parts are connected with bolts in the erection phase. Why is this Project so important? The object is supplemented and enriched by the area of the hockey sport, the offer in this category was up to this time in Slovakia only very rarely realized. Why is this Project so special? As mentioned, up to this time in Slovakia objects connected with the sport are very rarely realized. That is the reason why the realization of these types of objects is very important and very interesting. Foundations Base of the object – the setting the lower parts of the steel columns will form a reinforced concrete foot made of concrete of the class C16/20 as far downward as the non- freezing depth. The dimensions of the reinforced concrete foots are in the ground plan 2200 x 2200 mm to the depth 2000mm. The four anchoring bolts with T- heads anchor the structure that was taken into the foundations. The steel concrete foots are on the concrete pilots (each one with a bearing capacity of 500 kN). The foundation of the building on the site was very difficult. The seismicity is of 7o MSK-64, category “A”. Material and loading data The foundation and bearing structures were designed acc. to ENV 1993-1-1:1992 Euro code 3. The design of the device consists of the calculation and evaluation of a number of load cases and their complex combination effect: Except the dead load (own weight) was considered live load – in this case it is only by the illuminators, because no service platforms were designed, which would load the supporting steel structure. Snow loading (area II.) so = 0,70 kN/m2 and wind loading wo = 0,55 kN/m2 (during the erection and on the final building). After that was considered seism city 7o MSK-64, category “A” and temperature loading (shell structure contains a higher temperatures as the column support during the operation). Description of the method of the static calculation The static calculation is prepared with software NEXIS rel. 3.70. It was calculated on the 19 most dangerous combinations acc. to ENV 1993-1-1:1992 Euro code 3 with coefficient 1.35 in two basic combinations (bearing the capacity and deformations). The model contains 428 nodes, 794 bars and 446 macros 1D. It has 13 different profile sections of both basic materials – steel and concrete. The linear base modulus (3D frame) has solved over 10.000 equations. The cores were rated especially for the loading effects by reactions of the steel structure. Bearing capacity, deformations of the nodes and bars The text enclosure shows the bearing capacity of the bars and deformations of selected nodes in relevant load case combinations (this is the same in the graphic enclosure). The bearing capacity of the bars is different between 50 to 100%, t. m. 115 to 230 MPa. Horizontal deformation in the x, y direction should not exceed 1/500 of the node elevation above support (of the structure as whole) acc. to the recommended limit of deformations in ENV 1993-1-1:1992 Euro code 3. The software evaluates extreme deformations in every direction separately (x, y, z) as well as the maximum node rotation around the axes x, y, z. The text enclosure shows extreme deformations selected from all bars in the steel structure (this is the same in graphic enclosure). In this case, the maximum deflection should not be more than 1/350 of the beam length acc. to the recommended limit of deformations in ENV 1993-1-1:1992 Euro code 3, which was met in each case.
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