A Comparative Floor Assembly Design and Life-Cycle Assessment Study of Steel–Timber and Steel–Concrete Composite Structural Systems

Le résumé fourni par la source

Abstract Steel-timber composite (STC) structures, which utilize mass-timber cross-laminated-timber (CLT) floor panels compositely connected to steel framing, have emerged as a viable alternative structural system with a low carbon footprint along with potential improvements in the structural performance and constructability against traditional steel–concrete (SCC) systems. This paper focuses on the floor assembly design and sustainability aspect of STC systems relative to SCC systems with particular emphasis on results from a comparative whole-building life-cycle-assessment study conducted on functionally equivalent STC and SCC office buildings at 7 and 18 stories. Embodied carbon was lower in the STC systems since the total embodied carbon reduced by 50 and 42 percent in the 7- and 18-story structures, respectively. Embodied fossil energy was also lower in the STC systems since the total embodied fossil energy reduced by 32 and 21 percent in the 7- and 18-story structures, respectively. Sensitivity studies on biogenic carbon inclusion have shown substantial impact on the results.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.