Fire design of steel building

This graduation thesis deals with static analysis and design of three story office building with the focus on fire resistance using simple design methods. Main structure consists of moment resisting frames in transverse direction and frames with bracings and composite beams in longitudinal direction. Second order analysis including global initial imperfections was used to determine internal forces. For this purpose SCIA Engineer software was used. Seismic analysis was made using method with horizontal forces. In longitudinal direction the horizontal forces were transferred using concentric braced system. Construction is deigned in accordance with special rules for medium ductility level. Fire-resistance class for structure is R30. To provide building’s fire resistance beams and columns are protected using gypsum slabs. Composite beams are partially embedded in concrete