[en] Abstract
In pursuit of sustainable construction aligned with the European Green Deal and Taxonomy Regulation, this study investigated the structural performance of a steel–timber–concrete composite (STCC) shallow floor beam as a low‐carbon alternative to traditional steel– concrete systems. The cross‐laminated timber (CLT) used in the STCC configuration replaces most of the concrete and profiled steel sheeting, enabling reduced floor heights. The comprehensive experimental test campaign was conducted to evaluate the bending capacity, stiffness, and failure mechanisms under service and ultimate limit states. The beam consisted of two parallel welded HEA200 steel sections filled with concrete, flanked by CLT panels on the left and right sides. The top fibre of the CLT was aligned with the top of the steel flange. Both are covered by a 65 mm reinforced concrete slab and CTC (concrete‐timber‐connectors) to achieve composite action. A strain‐based method was employed to estimate the bending resistance, with assumptions of different configurations. The results were validated against the experimentally determined values. The findings demonstrate that the strain‐controlled approach is a step towards a reliable prediction of the bending capacity of STCC beams. The study highlights that STCC beams offer a promising solution for low‐carbon building design with reduced floor height.
