Given the global emphasis on sustainable development, the construction industry is increasingly prioritising advancements in building circularity (BC). This study conducted a comparative analysis on BC of multistorey reinforced concrete (RC) and timber frame structural systems: developing two digital models, a RC structure utilising conventional materials and a timber structure employing wood-based materials; performing structural analysis
in Midas Gen to establish comparable foundations; and quantitatively assessing the circularity performances of the two structure types across four levels: materials, elements, systems and the building as a whole. The results highlighted the significant advantages of wood-based materials in enhancing BC at specific levels. This study offers architects and practitioners new perspectives and theoretical foundations for design decisions and material selection.

KEYWORDS: timber frame structures, wood-based materials, building circularity assessment, comparative study