大跨度空间结构抗火研究进展与趋势分析
Research Progress and Trends in Fire Resistance of Large-Span Spatial Structures
火灾作用下大跨度空间结构可能会发生局部破坏和整体倒塌。随着城市化进程加快,大跨度空间结构在大型建筑中的应用日益广泛,其火灾安全问题备受关注。近年来,国内外学者围绕大跨度空间结构抗火开展大量研究,在不同结构的火灾响应规律、设计方法等方面取得了诸多代表性成果。本文首先详细阐述了国内外大跨度空间结构抗火研究在试验研究、数值分析、理论分析和性能化设计等方面取得的主要进展;随后指出在复杂构型设计、新型材料属性、简要分析方法和精细化试验方案等方面尚存在不足之处,并对精细化结构仿真模型、改进设计方法和智能化监测与预警系统等进行了展望,最后提出了亟待突破的关键科学问题,为我国大跨度空间结构抗火设计提供参考。
Under fire, large-span spatial structures may experience local damage and overall collapse. With the acceleration of urbanization, large-span spatial structures are increasingly used in various large-scale buildings, fire safety issues have attracted much attention. In recent years, scholars worldwide have focused on fire resistance of large-span spatial structures and conducted in-depth research on the fire response and design methods for different structures, achieving many representative results. In this paper, the main progress in fire resistance research on large-span spatial structures in terms of experimental research, numerical analysis, theoretical analysis and performance-based design is elaborated. Then, existing deficiencies in complex configuration designs, new material properties, simplified analysis methods and refined experimental plans are pointed out. Prospects are discussed for refined structural simulation models, improved design methods, intelligent monitoring and early-warning systems. Finally, key scientific and academic problems requiring further study are proposed, providing a reference for fire resistance design of large-span spatial structures in China.
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国家自然科学基金(52278224)
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