Fire Performance of Steel-Concrete Composite Wall Panels Under Combined Axial and Lateral Loading
DOI:
https://doi.org/10.71465/jgs48Keywords:
Composite Wall Panels, Structural Fire Engineering, Combined Loading, Thermo-Mechanical ResponseAbstract
The utilization of steel-concrete composite wall panels has become increasingly prevalent in the construction of modern high-rise and commercially complex structures due to their exceptional load-bearing capacity, rapid construction capabilities, and superior structural efficiency. However, the performance of these structural elements under extreme thermal conditions, particularly when subjected to complex stress states involving both axial and lateral loads, remains a critical area of investigation. This paper presents a comprehensive examination of the fire performance of steel-concrete composite wall panels subjected to combined axial and lateral loading. Through a detailed synthesis of experimental methodologies and advanced numerical simulations, this study explores the thermo-mechanical behavior, thermal gradient propagation, and ultimate failure mechanisms of composite panels exposed to standard fire curves. The research highlights the deleterious effects of lateral loading on the out-of-plane stability of the panels, which significantly accelerates the onset of structural collapse compared to purely axial loading scenarios. Furthermore, the investigation delineates the distinct roles of the steel faceplates and the concrete core in maintaining structural integrity at elevated temperatures. The findings provide critical insights into the degradation of material properties, the evolution of geometric non-linearities, and the interplay between thermal expansion and mechanical loads. The derived conclusions offer vital guidance for structural fire engineers, paving the way for more resilient design guidelines and safety assessments for composite structural systems in fire events.
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