Unlike slabs, structural diaphragms (such as concrete floor slabs acting under lateral wind or seismic loads) primarily resist forces acting parallel to their plane. They distribute horizontal forces to the vertical lateral-force-resisting systems (shear walls or frames). The elastic analysis of diaphragms involves plane stress elasticity equations to determine in-plane shear and axial stresses. 2. The Role of Design Tables in Engineering
"Theory of Plates and Shells" – Stephen P. Timoshenko & S. Woinowsky-Krieger Unlike slabs, structural diaphragms (such as concrete floor
Look at the structural detailing. For example, a monolithic concrete pour over stiff beams mimics a boundary. A slab resting loosely on a masonry wall acts as a Simply Supported boundary. Step 3: Calculate the Aspect Ratio Compute the ratio depending on how the specific table is indexed. Step 4: Extract the Coefficients Woinowsky-Krieger Look at the structural detailing
Widely used in European structural engineering, Czerny design tables offer rapid coefficients for rectangular concrete slabs under uniform or hydrostatic loading. They explicitly separate coefficients for field (mid-span) moments and support (negative) moments. 5. Elastic Theory vs. Plastic Analysis (Yield Line Theory) 3. How to Use the Tables
), and the continuity of the edges (e.g., two edges continuous, two edges discontinuous). Step 2: Calculate the Aspect Ratio
Covers vertical slabs acted upon by in-plane forces, such as deep beams and shear walls, using elastic theory. D. Special Applications Tables for continuous slabs and slabs supported on columns. 3. How to Use the Tables