A Workability and sustainability assessment of multistorey earthquake-resistant timber building

Paper in proceeding, 2023

Although two-Thirds of the area of Japan is covered with forests, the domestic wood resources are not widely used in the construction sector. Due to the complex design process, construction work and high precision needed, most of timber constructions are limited to one or two-storey buildings. This paper aims to clarify the efficiency of a proposed joint system for CLT walls-steel beams hybrid structure. In addition, the workability and the environmental impact of the proposed hybrid system in comparison to other structures were analysed. The proposed joint system showed higher workability and efficiency compared to other conventional joints in Japan. The construction process of a prototype of a module with the proposed system was studied and confirmed its easier and faster work than the conventional system. A 4-storey building was taken as a case study to evaluate the environmental impact of the proposed system. Although the proposed hybrid system showed higher carbon emissions than a conventional CLT alternative, advantage in terms of the environmental impact was confirmed in comparison to a reinforced concrete and a steel structure.