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趙國(guó)棟^1,2，孫會(huì)社¹，于立強(qiáng)¹，袁  鵬³
（1 山東省建筑科學(xué)研究院，濟(jì)南250031; 2 同濟(jì)大學(xué)，上海200096; 3 中國(guó)建筑科學(xué)研究院工程抗震研究所，北京100013）

[摘要] 火災(zāi)高溫對(duì)鋼結(jié)構(gòu)的材料性能特別是力學(xué)性能有顯著影響。近年來(lái)，隨著鋼結(jié)構(gòu)的應(yīng)用增多，火災(zāi)造成鋼結(jié)構(gòu)破壞的事故也逐漸明顯。結(jié)合工程實(shí)例，詳細(xì)敘述了鋼結(jié)構(gòu)災(zāi)后結(jié)構(gòu)安全性鑒定分析過(guò)程，對(duì)災(zāi)后廠房現(xiàn)場(chǎng)損傷檢查情況進(jìn)行描述，根據(jù)構(gòu)件環(huán)境溫度的判定和災(zāi)后材料的殘余力學(xué)性能對(duì)主體結(jié)構(gòu)綜合分析評(píng)定，并依據(jù)評(píng)價(jià)結(jié)構(gòu)給出可行的安全處理措施，為其他類似工程提供借鑒。
[關(guān)鍵詞] 鋼結(jié)構(gòu)；火災(zāi)；梁；力學(xué)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