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2 Theoretical Background

2.7.2 Design Internal Forces

Design Internal Forces

As described above, the calculation of stiffnesses is based on linear-elastic assumptions. The internal forces are transformed in the orthogonal reinforcement directions φ as well as on both surfaces s (top and bottom). The determined internal forces – bending moments mφ,s and axial forces nφ,s (torsion moments are eliminated by a transformation in the reinforcement directions) – depend on the

  1. type of model,
  2. method of calculation,
  3. classification criterion.