赵国栋^1,2，孙会社¹，于立强¹，袁  鹏³
（1 山东省建筑科学研究院，济南250031; 2 同济大学，上海200096; 3 中国建筑科学研究院工程抗震研究所，北京100013）

[摘要] 火灾高温对钢结构的材料性能特别是力学性能有显著影响。近年来，随着钢结构的应用增多，火灾造成钢结构破坏的事故也逐渐明显。结合工程实例，详细叙述了钢结构灾后结构安全性鉴定分析过程，对灾后厂房现场损伤检查情况进行描述，根据构件环境温度的判定和灾后材料的残余力学性能对主体结构综合分析评定，并依据评价结构给出可行的安全处理措施，为其他类似工程提供借鉴。
[关键词] 钢结构；火灾；梁；力学性能

    Structural safety identification and security measures of a steel structure plant after fire
    Zhao Guodong^1,2, Sun Huishe¹, Yu Liqiang¹, Yuan Peng³
    (1 Shandong Province Academy of Building Research, Ji'nan 250031, China; 2 Tongji University,  Shanghai 200092, China; 3 Institute of Earthquake Engineering, China Academy of Building Research, Beijing 100013, China)

Abstract: The temperature of fire has a significant impact on the material properties, especially on the mechanical properties. In recent years, with increased application of steel structure, structural damage caused by the fire became evidently. Based on the engineering, the analysis processes of the structural safety identification was described in detail after fire, first the damage inspection condition was described to the plant after fire disaster,  followed a comprehensive analysis and assessment of the main structure were gave by decision of element ambient temperature and the residual mechanical properties post-disaster, and then gave viable security measures were pointed out to provide a reference to other similar projects.
Keywords: steel structure;  fire;  beam;  mechanicalproperty