258 X4 Category 4: Special Projects Introduction to the project This small composite structure of steel and concrete is part of a larger concept that includes two tennis courts set amid a beautiful landscape full of trees and plants. The tennis courts were designed according to international rules and specifications. The building will accommodate a small café and the locker room for the tennis players. It was designed with the provision for a roof garden in the future. Description of the project The main structure was designed with steel members and concrete slabs. The composite beam module was used in order to design the secondary beams to reduce the weight of these members. Approach The distances between the columns of each frame were about 5.80 m. The distances between the frames were set at 3.90 m. The dimensions of the building were 10.25 m x 5.80 m and the height was approximately 3.50 m. We used HEA260 for the columns, IPE300 for the main beams, IPE220 and IPE100 for the secondary beams and an SHS cross-section for the roof bracing. To simulate the diaphragm of the slab, HEA1000 for the roof bracing was used, without weight and mass, using property modifiers. The use of Scia Engineer in this project We designed the 3D model, using the Line Grid option. The next step was to make all the load cases, load groups and load combinations. Load groups: 1. G : permanent 2. S : snow 3. W : wind 4. E : seismic 5. Q : variable 6. T : temperature Load cases: 1. LC1 : self-weight 2. LC2 : permanent 3. LC3 : variable 4. LC4 : snow 5. LC5 : seismic X 6. LC6 : seismic Y 7. LC7 : thermal + 8. LC8 : thermal - 9. LC9 - LC24 : 3D Wind Load Cases Load combinations: 1. EN-ULS 2. EN-SLS 3. EN-seismic X 4. EN-seismic Y For the wind loads we used the 3D wind option to calculate with accuracy all the zones according to EN1991-1-4. For the permanent and the snow loads we used line forces on beams. We used thermal loads (+/-20 degrees) for columns and the round beams. These members will be outside the building. The seismic design followed EN1998. After the linear and the modal analysis, we conducted section and unity checks for all the members. We also proceeded to a serviceability check for the main beams. Software: Scia Engineer Sports Club with Two Tennis Courts - Crete, Greece
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