Suggested approaches for modelling a waffle slab in PROKON:
Consider a series of equivalent one-way (2D) frames.
Frame Analysis or Sumo Structrural Modeller
To model a waffle slab in a 2D or 3D model:
- Set up a 2D grillage or 3D model using T-beams for the ribs and rectangular beams for the solid strips.
- Enter cable loads as a separate load case. Equivalent loads taking account of losses etc. will have to be calculated for each cable and entered as loads.
- Set up load combinations for various combinations of prestress with dead and live loads and their respective load factors, including pattern loading.