Nemetschek Structural User Contest 2013

30 X1 Category 1: Buildings Description of the project The building is designed as a reinforced concrete monolithic skeleton structure with bracing walls of the vertical core. It has 3 underground floors and 18 aboveground floors. The foundation slab is assessed on the 5 m-thick gravel layer. Under the gravel there is a neogene clayey layer more than 30 m thick. The whole building was designed as one unit, without a dilatation joint between the high part and the underground part. The measurements of the underground part are 96 x 52 m. The foundation slab under the high part working together with reinforced concrete piles is 1,200 mm thick, under the columns there is a mushroom head for punching efforts. The foundation slab under the low part is 400 mm thick. The maximum underground water lifting power is higher than the dead load of the low part, so the structure is protected against underground water pressure by piles. All peripheral walls and slabs are designed as watertight reinforced concrete with the maximum crack width 0.25 mm. The vertical bearing elements are reinforced concrete monolithic columns and walls. C40/50 concrete is used for the columns, C30/37 for the other vertical structure and C25/30 for the typical upper floor slabs. The walls of the vertical communication core ensure the stability of the building against wind and seismic load. The maximum seismic acceleration of 0.6 m/s2 was used for calculation. The span of 7.8 x 8.1 m is used for the columns. The horizontal bearing elements are beamless solid slabs with reinforced concrete mushrooms heads. The thickness of the slabs for floors is 200 mm and the mushrooms heads ensure the allowed deflections and the shearing efforts. The slab over the 1st underground floor is designed for 33 kN/m2 of dead load because there is a park with trees provided. The layouts of the 1st and 2nd floors do not have the same shape as the other upper floors, that is why they are hung on the 3rd floor slab. This slab was reinforced by beams for this reason. The length of the peripheral columns on the 1st, 2nd and 3rd floors supporting the whole building is 12 m. The process of work started in January 2012 and the expected deadline is June 2013. The excavation, piles and whole concrete bearing structure were completed in September 2012. Use of Scia Engineer Scia Engineer software was used for the static and dynamic analysis. The EN standards were used for calculation. One complete model of the main structure and some partial models for particular floors were made, and all bearing elements are designed. The Soilin module was used for the settlement calculations and for the contact tensions. Scia Engineer allows for the model of the complicated building to be produced very easily. It allows for a number of alternatives of the structure as well. There were more designs in the process of the work according to the client and architect demands and Scia Engineer permits changing of the structure very easily. The real deflections of the structure were measured on site, and the results are very near to the calculated deflections. Software: Scia Engineer Forum Business Center - Bratislava, Slovakia