钢结构地震后火灾耦合灾害研究

Research on Fire and Earthquake Coupled Disasters in Steel Structures

摘要: 本文以钢结构在地震–火灾双重灾害下的有限元分析，系统分析了耦合灾害的触发机理、损伤劣化规律。通过梳理国内外典型灾害案例，结合Abaqus有限元模拟方法，揭示了地震损伤与火灾高温的协同作用机制；从材料、构件、结构三个层面，结合现行国家标准，提出了针对性的预防预警策略。研究结果可为钢结构多灾害协同设计、灾后风险评估及工程处置提供理论支撑与实践参考。

Abstract: This paper conducts a finite element analysis of steel structures under the dual disasters of earthquake and fire, systematically analyzing the triggering mechanisms of coupled disasters and the patterns of damage deterioration. By reviewing typical disaster cases at home and abroad, and combining them with Abaqus finite element simulation methods, the synergistic mechanism of earthquake damage and high-temperature fire is revealed; at the levels of materials, components, and structures, combined with current national standards, targeted prevention and early-warning strategies are proposed. The research results can provide theoretical support and practical reference for the collaborative design of steel structures against multiple disasters, post-disaster risk assessment, and engineering handling.