Performance of Partially Concrete Filled C-purlin Beam-Slab System: Numerical Investigation

Abstract

Lightweight cold-formed steel beams are widely utilized in roofing systems.  Recently, engineers have increasingly used concrete-filled cold-formed steel tube beams for flooring systems due to their sufficient structural performance. A system that uses cold-formed steel beam sections with dry-board profile steel sheet slab (CBPDS) system would cost less than the conventional I-steel beam-slab system, with less self-weight, it is considered one of the types of sustainable buildings. This study numerically investigated the structural performance of the newly suggested composite beam-slab (CBPDS) system. It was found that the partially filled C-purlin beam can significantly affect the system in the elastic and plastic ranges for the specimens (CBPDS-DF, CBPDS-DS, and CBPDS-S). The bending capacity of the specimens with varied beam configurations (CBPDS-DF, CBPDS-DS, and CBPDS-S) was decreased by about 50% when using a partially filled specimen from Le to Le/5. This happens because there is less concrete in the area that is only partially filled to help resist bending forces, which in turn will accelerate its failure.