About errors of the example of calculation of a reinforced concrete casson floor panel in the designer's handbook

Abstract

The construction industry of the Russian Federation in the near future expects a full-scale transition to information modeling (BIM) technologies. The calculation of building structures is carried out using models in software systems based on the finite element method, which is not accurate. To substantiate the reliability of the obtained FEM data in accordance with the requirements of regulatory documents, it is necessary to verify and validate the calculation models, to perform an engineering assessment of the results by comparison with the reference value obtained experimentally or analytically. Generally accepted analytical solutions are given in the designer's handbooks. The paper considers an example of the calculation of a reinforced concrete coffered floor from the designer's reference book. It has been proved by a refined analytical method and computer calculation that when determining the forces in beams, the calculation example has four errors, one of which is fundamental, embedded in the well-known analytical method for calculating caisson structures. It consists in the fact that when determining the loads on orthogonal beams, the rigidity of the structure is not taken into account.