End colloquium Daan Janssen

The influence of a bundle of electrical pipes on the load-bearing capacity of composite concrete floors

In this research the structural impact of embedded (electrical) pipes, cables and ducts in (composite) concrete floors, focusing on elongated openings of limited height is explored. Using analytical models, a parametric study and non-linear FEM analyses in DIANA, the research shows how such openings affect internal force distribution and can lead to local bending-dominated failure governed by the Vierendeel mechanism. The results highlight the importance of proper reinforcement detailing around the opening, particularly suspension reinforcement, to ensure ductile behaviour and sufficient load-bearing capacity. Recommendations regarding practice and further research are provided for the safe integration of pipes, cables, and ducts in concrete floor systems and to further investigate this behaviour.