In concrete elements;
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The flexible diaphragm model is the analytical model that represents the situation where slab stiffness is taken into account. The stiffness calculation is calculated depending on the slab thickness, dimensions and material parameters. The flexible diaphragm acceptance is the one that reflects the most realistic behavior of the slab behavior in the structure analysis model. In the flexible diaphragm model, slabs are modeled with Local Axes of Shell Elements. Local axes of shell elements can move in-plane out-of-plane and create stresses on the shell element. Concrete slab design can be made according to this stress distribution .
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The relationship between the numbers and colors of the local axes in the beam elements is as follows.
1 direction - Red
2 direction - Green
3 direction - Blue
There are 6 degrees of freedom in a cross-section of a bar element for which three-dimensional analysis is performed. These are translations in directions 1,2 and 3 and rotations about 1,2 and 3.
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