- 摘 要
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(北京邁達斯技術(shù)有限公司， 北京 100044)
［摘要］以往鋼結(jié)構(gòu)防火設(shè)計更多的是從建筑層面的防火構(gòu)造措施來解決。結(jié)合對《建筑鋼結(jié)構(gòu)防火技術(shù)規(guī)范》（GB 51249—2017）的理解，由理論切入，到緊密契合防火規(guī)范和軟件應(yīng)用，全方位地介紹了建筑鋼結(jié)構(gòu)防火分析與設(shè)計的實現(xiàn)方法。首先從結(jié)構(gòu)層面闡述了鋼結(jié)構(gòu)防火設(shè)計的三種方法，其次介紹了鋼結(jié)構(gòu)防火設(shè)計在midas Gen中的實現(xiàn)流程，結(jié)合規(guī)范對綜合輻射率、等效熱傳導(dǎo)系數(shù)、等效熱阻、保護層厚度等重要防火參數(shù)的應(yīng)用進行了解析。同時，也提出了軟件中考慮火災(zāi)下鋼構(gòu)件熱膨脹力的解決方案。最后分享了利用軟件的施工分析功能模擬結(jié)構(gòu)在火災(zāi)發(fā)展過程中各個時刻的受力性能響應(yīng)。
［關(guān)鍵詞］鋼結(jié)構(gòu)防火設(shè)計；耐火極限法；承載力法；臨界溫度法；防火措施；火災(zāi)模擬
中圖分類號：TU391 文獻標識碼：A文章編號：1002-848X(2021)13-0079-08
Code understanding and software application for fire protection design of steel structures in buildings
GAO Dezhi, CHEN Hui
(MIDAS Information Technology Beijing Co., Ltd., Beijing 100044，China)
Abstract: In the past, the fire protection design of steel structures was more solved from the fire protection structure measures at the building level. Combining the understanding of the "Code for fire safety of steel structures in buildings" (GB 51249—2017), from theoretical breakthroughs to close compliance with fire protection codes and software applications, the implementation method of fire protection analysis and design of steel structures building was introduced in an all-round way. Firstly, the three methods of steel structure fire protection design were explained from the structural level, and then the realization process of steel structure fire protection design in midas Gen was introduced. Combined with the specifications, the application of important fire protection parameters was analyzed including the comprehensive emissivity, equivalent thermal conductivity, equivalent thermal resistance and protective layer thickness. At the same time, a software solution to consider the thermal expansion force of steel components under fire was also proposed. Finally, the use of the software’s construction analysis function was introduced to simulate the mechanical performance response of the structure at various moments in the fire development process.
Keywords:fire protection design of steel structure； fire resistance limit method； bearing capacity method； critical temperature method； fire protection measure； fire simulation
作者簡介：高德志，學(xué)士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：gdz547@126.com。
