| Title |
Sensitivity Analysis for Insulation Design Optimization of Exterior Wall-Floor Joints in Frame Structured Precast Concrete Apartment Buildings |
| Authors |
주나영(Joo, Na-Young) ; 송승영(Song, Seung-Yeong) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.4.247 |
| Keywords |
Precast Concrete; Sensitivity Analysis; Frame Structure; Apartment; Insulation; Thermal Bridge |
| Abstract |
This study conducted a comprehensive analysis of the key design variables influencing the thermal insulation performance of exterior wall-floor joints in precast concrete (PC) apartment buildings. By applying the one-at-a-time (OAT) sensitivity analysis method, the study systematically evaluated the relative importance of each variable in determining energy efficiency. The analysis of the effective U-factor indicated that Variable C, representing the thickness of insulation installed between the exterior wall and the girder, and Variable B, denoting the length of the concrete corbel, were the most critical factors. Among these, B showed a particularly strong impact on enhancing energy performance by effectively minimizing thermal bridging through the reduction of the concrete corbel length. On the other hand, Variable D, referring to the thickness of the insulation wrapping around the girder, was beneficial only up to a certain point, after which its effectiveness declined sharply. Lastly, Variable A, the thickness of interior insulation, showed minimal impact on the effective U-factor, suggesting it plays a relatively minor role in improving the thermal insulation of exterior wall-floor joints in PC apartment buildings. |