Performance Improvement of Connection Between Linear-Supporting Precast Facade Panel and Main Structure

Precast facade panels highly integrate multiple functions such as decoration， thermal insulation， fire resistance， structural performance， and waterproofing， representing an important technical route for achieving industrialized construction， longevity， and quality enhancement of the envelope system. Traditional linear-supporting connections for facade panels tend to form linear thermal bridges， which can weaken the thermal performance of the envelope system. To address this， a centralized connection that balances structural safety and thermal performance has been proposed. Experiment and finite element analysis have been conducted on its out-of-plane mechanical performance and thermal performance. The results indicate that the rotation ratio of the facade panel at the peak and ultimate status of the specimens are 1/32 and 1/20， respectively. The connection with concrete punching shear failure still exhibits good deformation capacity， necessitating enhanced punching shear resistance design in the connection. The thermal bridge effect of the centralized connection is only 17.4% of that of a traditional linear-supporting connection， thereby achieving thermal bridge mitigation near the connection. The proposed centralized connection can be applied to achieve coordinated improvement of both structural and thermal performances of the linear-supporting connection between the facade panel and the main structure．