Environmental and functional improvements on concrete roof shell by opening frame structure to reduce CO2 emissions

Despite recent global efforts to achieve carbon neutrality, the building industry still emits large amounts of carbon dioxide, posing a major challenge in achieving a sustainable society. Concrete has been used primarily as a limited structural material in modern construction because of its structural safety, durability, and low cost. However, since the construction is based on pouring in a formwork and the members tend to be wayward and massive, it has extremely low lighting and ventilation properties if we focus on the basic characteristics related to the living environment. In this study, a concrete roof shell was created, which highlighted the darkness inside the roof due to the closed nature of concrete. Therefore, a structural analysis of the roof shape was performed to ensure sufficient openings in the concrete roof shell roof section. In addition, we evaluated the possibility of improving the environmental performance of concrete, and proved that the reduction of CO2 emissions at each concrete strength could be fulfilled, and the realization of creating a concrete shell in a frame-like structure like a wooden structure would increase the translucency of the roof interior and enable users to significantly improve the environmental performance at the stage of use. This has led to a significant improvement in environmental performance in the stage of users' use.