高强钢结构抗火研究进展
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摘要
高强钢结构的性能与应用是近年来建筑结构领域的热点研究课题之一,其火灾性能至关重要.本文总结国内外高强钢结构的抗火研究现状,包括高强钢高温材料性能、高强钢构件抗火性能以及高强钢用于梁柱连接节点的抗火性能研究等.不同种类高强钢的高温力学性能差异显著,且基于普通钢材料力学性能的现行钢结构设计规范均不能经济可靠地指导高强钢结构防火设计;国内外对高强钢构件及节点的抗火性能研究以理论分析和数值模拟为主,试验研究相对匮乏,远不能满足高强钢结构设计需求.因此,有必要进行更多更深入的试验和理论研究,以完善高强钢结构的设计理论,为相关设计规范修订提供依据.
In recent years the research on the behavior and application of high strength steel structures has become one of the major topics in the field of civil engineering,with the performance of high strength steels at elevated temperatures being of great significance.A state-of-the-art review on the fire-resistance behavior of high strength steel structures is presented,including the material properties at elevated temperatures,the fire-resistance behavior of components and beam-column connection joints made of high strength steels.Recent studies have demonstrated that different kinds of high strength steels present significant difference on mechanical properties at elevated temperatures,and no current design standard can be safely used to conduct fire-resistance design or evaluation of steel structures with high strength,because the recommendations of current leading design standards of steel structures are mainly obtained based on mild steels.The available fire-resistance researches on the components and joints made of high strength steels mainly focus on theoretical analysis and numerical simulation, and experimental studies are relatively limited,restricting the application of high strength steels in the field of civil engineering.Therefore,for the application and the development of high strength steel structures,more experimental and theoretical studies need to be carried out to improve the design theory of high strength steel structures.
In recent years the research on the behavior and application of high strength steel structures has become one of the major topics in the field of civil engineering,with the performance of high strength steels at elevated temperatures being of great significance.A state-of-the-art review on the fire-resistance behavior of high strength steel structures is presented,including the material properties at elevated temperatures,the fire-resistance behavior of components and beam-column connection joints made of high strength steels.Recent studies have demonstrated that different kinds of high strength steels present significant difference on mechanical properties at elevated temperatures,and no current design standard can be safely used to conduct fire-resistance design or evaluation of steel structures with high strength,because the recommendations of current leading design standards of steel structures are mainly obtained based on mild steels.The available fire-resistance researches on the components and joints made of high strength steels mainly focus on theoretical analysis and numerical simulation, and experimental studies are relatively limited,restricting the application of high strength steels in the field of civil engineering.Therefore,for the application and the development of high strength steel structures,more experimental and theoretical studies need to be carried out to improve the design theory of high strength steel structures.
引文
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