Study on mechanical properties of large-span spatial structures under large-space fire: Review and outlook

The application of large-span spatial structures has become increasingly widespread in the construction industry; however, relevant research on fire resistance remains limited. Thus, it is crucial to develop assessment methods and temperature distribution prediction models tailored to the high-temperature fire behavior of large-span spatial structures. This study provides a comprehensive review of recent research on the mechanical properties and analytical methods for cable members, key joints, and the overall structure under fire. Additionally, it discusses current gaps and outlines future research directions to advance fire protection design for large-span spatial structures. The primary research directions include: In terms of members and key joints, develop a standardized high-temperature performance degradation model for cable members and key joints in large-span spatial structures. Regarding the overall structure: utilize advanced numerical simulations and theoretical derivations to establish methods for assessing fire response behavior and predicting temperature field distribution in large-span spatial structures. Effectively implement fire protection design methods tailored for large-span spatial structures in practical construction projects.