Advancements in Lightweight Cold-Formed Composite Steel-Concrete Floor Systems: Recent Findings from the LWT-FLOOR Project

Nowadays, the reuse and recycling of steel-concrete composite structures is a topic of significant interest. However, traditional systems do not provide easy dismantling possibilities making reuse and recycling not viable. Innovative projects like the LWT-FLOOR project ongoing at the University of Zagreb, Faculty of Civil Engineering, Croatia, are trying to overcome these obstacles. The LWT- FLOOR project aims to develop a novel structural floor system with a demountable shear connection. The proposed system is formed of built-up cold-formed steel beams and cast-in-place concrete slabs that are interconnected using an innovative demountable type of shear connection allowing the floor system components to be easily dismantled. This paper summarises an overview of the LWT-FLOOR project background and objectives, realised and planned activities with a summary of analytical, numerical and experimental results on the components and system capacity.