How RFEM and RSTAB calculate the moment of inertia ly of a castellated beam from the library?
The reduced moment of inertia ly, for example for WAB HEB 340‑340, is calculated as follows:
red ly = 0.8 * A * ((H - tg) / 2)2
red ly = 0.8 * 150.50 * ((51.00 - 2.15) / 2)2 = 71.828 cm4
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions