Calculation of composite slabs and beams and stability problems of composite beams

In the beginning of the 20th century, the plane industry's need for components that were extremely light, yet had a high carrying capacity helped encourage extensive research on cold formed thin-walled members. This method was used during the First World War to make car hoods and railroad wagons; on the other hand the material shortage during the Second World War caused the need to further research this technique. This knowledge accumulation which started in the airplane and automobile sector, with time was beginning to be used in the construction sector, and folded metal sheet, which previously was only used as a formwork for concrete, is now a carrier member that earns economy for the system. In this practice, certain subjects on composite slabs and beams that are needed to know and involved T.S. regulations are brought together. Different thoughts and algorithms aimed at composite working durations are especially being worked at to be manifestated for composite slabs and composite beams. Composite working increases the moment capacity of beams, but the steel beam must resist bigger shear forces. This causes a problem of stability. Results on local buckling demand on researches of tests. Keywords: Composite slab, composite beam, stability. xvt