- 摘 要
-
(1 中國建筑科學(xué)研究院有限公司, 北京 100013; 2 杭州市會(huì)展新城開發(fā)建設(shè)有限公司, 杭州311200; 3 安徽理工大學(xué)土木建筑學(xué)院, 淮南 232001)
摘要: 基于結(jié)構(gòu)靜力試驗(yàn)相似理論與溫度場類相似理論,對輕型鋼構(gòu)件(結(jié)構(gòu))的熱-力耦合類相似理論進(jìn)行了研究. 并通過鋼柱、鋼梁和鋼框架的原型結(jié)構(gòu)耐火極限與縮尺模型的耐火時(shí)間對比分析,對該理論進(jìn)行了驗(yàn)證. 結(jié)果表明:結(jié)合結(jié)構(gòu)靜力試驗(yàn)相似理論與溫度場類相似理論,可使縮尺模型的耐火時(shí)間與 ISO834 標(biāo)準(zhǔn)升溫曲線作用下原型結(jié)構(gòu)的耐火極限相同,即火災(zāi)作用下輕型鋼構(gòu)件(結(jié)構(gòu))熱-力耦合類相似理論成立. 當(dāng)模型自重對荷載的影響不可忽略時(shí),可通過人工附加配重的方法來彌補(bǔ)縮尺模型材料容重的不足.
關(guān)鍵詞: 輕型鋼構(gòu)件(結(jié)構(gòu)); 熱-力耦合類相似理論; 非膨脹型防火涂料; 數(shù)值模擬; 耐火極限
中圖分類號(hào):TU398. 5 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)12-0007-08
DOI:10. 19701 / j. jzjg. 20201485
Research on quasi-similarity theory of thermo-mechanical coupling of light steel members(structures) under fire
ZHANG Gengyuan1, CHEN Xiao2, QIU Canghu1, JIAO Bing1, WANG Guangyong1,ZHANG Wei1, SHI Yanyan1, CAO Bo3
(1 China Academy of Building Research, Beijing 100013, China; 2 Hangzhou Convention and Exhibition of New CenturyCity Development and Construction Co. , Ltd. , Hangzhou 311200, China; 3 School of Civil Engineering and Architecture,Anhui University of Science and Technology, Huainan 232001, China)
Abstract: Based on the similarity theory of structural static test and quasi-similarity theory of temperature field, the studywas conducted on the quasi-similarity theory of thermo-mechanical coupling of light steel members (structures). The theorywas validated by comparing and analyzing the fire resistance limits of prototype structures and the fire resistance time ofscaled models of steel columns, steel beams, and steel frames. The results show that by combining the similarity theory ofstructural static test and quasi-similarity theory of temperature field, the fire resistance time of the scaled model can bemade identical to the fire resistance limit of the prototype structure under the ISO834 standard temperature rise curve, thusproving the validity of the quasi-similarity theory of thermo-mechanical coupling of light steel members ( structures) underfire. When the influence of the model's own weight on the load cannot be ignored, it is possible to compensate for theinsufficient material density of the scaled model by artificially adding additional weights.
Keywords:light steel member (structure); quasi-similarity theory of thermo-mechanical coupling; non-bulgy fire retardantcoating; numerical simulation; fire resistance limit
∗中國建筑科學(xué)研究院自籌基金科研項(xiàng)目(20190111330730002),國家重點(diǎn)研發(fā)計(jì)劃(2017YFC0803300).
第一作者:張耕源,碩士,工程師,主要從事建筑結(jié)構(gòu)、建筑防火研究,Email: zhagy10@ 126. com.
[引用本文] 張耕源,陳驍,邱倉虎,等. 火災(zāi)作用下輕型鋼構(gòu)件(結(jié)構(gòu))熱-力耦合類相似理論研究[J]. 建筑結(jié)構(gòu),2023,53(12):7-14,29. ZHANG Gengyuan,CHEN Xiao,QIU Canghu,et al. Research on quasi-similarity theory of thermomechanical coupling of light steel members (structures) under fire[J]. Building Structure,2023,53(12):7-14,29.
- 下載地址
-
