Article(id=1149738623492342066, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149738621005119786, articleNumber=1003-3033(2024)09-0114-07, orderNo=null, doi=10.16265/j.cnki.issn1003-3033.2024.09.0647, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1708531200000, receivedDateStr=2024-02-22, revisedDate=1716220800000, revisedDateStr=2024-05-21, acceptedDate=null, acceptedDateStr=null, onlineDate=1752048648951, onlineDateStr=2025-07-09, pubDate=1727452800000, pubDateStr=2024-09-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1752048648951, onlineIssueDateStr=2025-07-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1752048648951, creator=13701087609, updateTime=1752048648951, updator=13701087609, issue=Issue{id=1149738621005119786, tenantId=1146029695717560320, journalId=1146031787341344770, year='2024', volume='34', issue='9', pageStart='1', pageEnd='252', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1752048648358, creator=13701087609, updateTime=1757401551172, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1172190322751816581, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149738621005119786, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1172190322751816582, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149738621005119786, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=114, endPage=120, ext={EN=ArticleExt(id=1149738623651725619, articleId=1149738623492342066, tenantId=1146029695717560320, journalId=1146031787341344770, language=EN, title=Insulating properties of ultra-thin fireproof coatings for steel structure under various heating conditions, columnId=1149733269173878863, journalTitle=China Safety Science Journal, columnName=Safety engineering technology, runingTitle=null, highlight=null, articleAbstract=

To achieve the accurate evaluation of steel structure fire resistance in the converter station,based on the possible standard,power and hydrocarbon fire scenarios,the thermal insulation mechanism of ultra-thin fireproof coating as well as its thermal insulation performance on steel members with different steel materials and different cross-section shape factors were investigated through micro-scale thermogravimetric-Fourier transform infrared (TG-FTIR) spectroscopy experiments and small-scale fire test furnace heat insulation experiments. The experimental results show that the faster the fire heating rate,the higher the peak mass loss rate and the higher the peak temperature of the fireproof coating. Different fire heating curves have no effect on the type of gases escaping from the thermal decomposition of fireproof coatings,but have an effect on the amount and peak temperature of escaping gases. Compared with the power and hydrocarbon fire,in the condition of standard fire,more gases are produced before 750 ℃,resulting in better expansion and heat insulation. Furthermore,the fire resistance of the ultra-thin fireproof coatings on the carbon steel and stainless steel at various cross-section shape factors at power and hydrocarbon fire is worse than that of standard fire,indicating poor heat insulation abilities.

, correspAuthors=Yanming DING, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Jiaqing ZHANG, Yubiao HUANG, Gonghua JIANG, Lingxin HE, Yanming DING), CN=ArticleExt(id=1149738635345445404, articleId=1149738623492342066, tenantId=1146029695717560320, journalId=1146031787341344770, language=CN, title=多火灾升温条件下超薄型钢结构防火涂料隔热性能研究, columnId=1149733269727526997, journalTitle=中国安全科学学报, columnName=安全工程技术, runingTitle=null, highlight=null, articleAbstract=

为准确评估换流站钢结构的抗火性能,基于换流站中可能出现的标准、电力及碳氢火灾情况,通过耦合微尺度热重-红外光谱(TG-FTIR)联用热解试验与小尺度耐火试验炉隔热试验,同时在标准、电力及碳氢3种火灾升温条件下,研究超薄型钢结构防火涂料的热解机制以及对不同材质、不同截面形状系数钢构件的隔热性能。试验结果表明:火灾升温速率越快,防火涂料热解的质量损失速率峰值越大,且对应的峰值温度也更高;不同火灾升温曲线对防火涂料热解逸出的气体类型并无显著影响,但对逸出气体量和逸出峰值温度有影响;相比于电力和碳氢火灾升温曲线,标准火灾升温曲线下,防火涂料在750 ℃之前释放出更多热解气体,从而更好地发泡膨胀,更快地起到抗火隔热效果;进一步,超薄型防火涂料在碳钢和不锈钢基体以及多种截面形状系数下,其在电力和碳氢火灾升温下的耐火极限均明显低于标准火灾,隔热性能显著降低。

, correspAuthors=丁彦铭, authorNote=null, correspAuthorsNote=
** 丁彦铭(1989—),男,山东威海人,博士,教授,博士生导师,主要从事火灾安全和智慧应急等方面的研究。E-mail:
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张佳庆 (1987—),男,安徽桐城人,博士,教授级高级工程师,主要从事电力火灾与安全防护研究与管理工作。E-mail:

黄玉彪,高级工程师

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张佳庆 (1987—),男,安徽桐城人,博士,教授级高级工程师,主要从事电力火灾与安全防护研究与管理工作。E-mail:

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多火灾升温条件下超薄型钢结构防火涂料隔热性能研究
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张佳庆 1 , 黄玉彪 1 , 蒋恭华 2 , 何灵欣 1 , 丁彦铭 2, **
中国安全科学学报 | 安全工程技术 2024,34(9): 114-120
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中国安全科学学报 | 安全工程技术 2024, 34(9): 114-120
多火灾升温条件下超薄型钢结构防火涂料隔热性能研究
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张佳庆1 , 黄玉彪1, 蒋恭华2, 何灵欣1, 丁彦铭2, **
作者信息
  • 1 国网安徽省电力有限公司电力科学研究院 电力火灾与安全防护安徽省重点实验室(国家电网公司输变电设施火灾防护实验室),安徽 合肥 230601
  • 2 中国地质大学(武汉) 工程学院,湖北 武汉 430074
  • 张佳庆 (1987—),男,安徽桐城人,博士,教授级高级工程师,主要从事电力火灾与安全防护研究与管理工作。E-mail:

    黄玉彪,高级工程师

通讯作者:

** 丁彦铭(1989—),男,山东威海人,博士,教授,博士生导师,主要从事火灾安全和智慧应急等方面的研究。E-mail:
Insulating properties of ultra-thin fireproof coatings for steel structure under various heating conditions
Jiaqing ZHANG1 , Yubiao HUANG1, Gonghua JIANG2, Lingxin HE1, Yanming DING2, **
Affiliations
  • 1 Anhui Provincial Key Laboratory for Power Fire and Safety Protection (State Grid Transmission and Transformation Facilities Fire Protection Laboratory),State Grid Anhui Electric Power Co.,Ltd.,Electric Power Research Institute,Hefei Anhui 230601,China
  • 2 School of Engineering,China University of Geosciences,Wuhan Hubei 430074,China
出版时间: 2024-09-28 doi: 10.16265/j.cnki.issn1003-3033.2024.09.0647
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为准确评估换流站钢结构的抗火性能,基于换流站中可能出现的标准、电力及碳氢火灾情况,通过耦合微尺度热重-红外光谱(TG-FTIR)联用热解试验与小尺度耐火试验炉隔热试验,同时在标准、电力及碳氢3种火灾升温条件下,研究超薄型钢结构防火涂料的热解机制以及对不同材质、不同截面形状系数钢构件的隔热性能。试验结果表明:火灾升温速率越快,防火涂料热解的质量损失速率峰值越大,且对应的峰值温度也更高;不同火灾升温曲线对防火涂料热解逸出的气体类型并无显著影响,但对逸出气体量和逸出峰值温度有影响;相比于电力和碳氢火灾升温曲线,标准火灾升温曲线下,防火涂料在750 ℃之前释放出更多热解气体,从而更好地发泡膨胀,更快地起到抗火隔热效果;进一步,超薄型防火涂料在碳钢和不锈钢基体以及多种截面形状系数下,其在电力和碳氢火灾升温下的耐火极限均明显低于标准火灾,隔热性能显著降低。

升温条件  /  超薄型钢结构防火涂料  /  隔热性能  /  标准火灾  /  碳氢火灾  /  钢构件

To achieve the accurate evaluation of steel structure fire resistance in the converter station,based on the possible standard,power and hydrocarbon fire scenarios,the thermal insulation mechanism of ultra-thin fireproof coating as well as its thermal insulation performance on steel members with different steel materials and different cross-section shape factors were investigated through micro-scale thermogravimetric-Fourier transform infrared (TG-FTIR) spectroscopy experiments and small-scale fire test furnace heat insulation experiments. The experimental results show that the faster the fire heating rate,the higher the peak mass loss rate and the higher the peak temperature of the fireproof coating. Different fire heating curves have no effect on the type of gases escaping from the thermal decomposition of fireproof coatings,but have an effect on the amount and peak temperature of escaping gases. Compared with the power and hydrocarbon fire,in the condition of standard fire,more gases are produced before 750 ℃,resulting in better expansion and heat insulation. Furthermore,the fire resistance of the ultra-thin fireproof coatings on the carbon steel and stainless steel at various cross-section shape factors at power and hydrocarbon fire is worse than that of standard fire,indicating poor heat insulation abilities.

various heating conditions  /  ultra-thin fireproof coating for steel structure  /  heat insulation performance  /  standard fire  /  hydrocarbon fire  /  steel components
张佳庆, 黄玉彪, 蒋恭华, 何灵欣, 丁彦铭. 多火灾升温条件下超薄型钢结构防火涂料隔热性能研究. 中国安全科学学报, 2024 , 34 (9) : 114 -120 . DOI: 10.16265/j.cnki.issn1003-3033.2024.09.0647
Jiaqing ZHANG, Yubiao HUANG, Gonghua JIANG, Lingxin HE, Yanming DING. Insulating properties of ultra-thin fireproof coatings for steel structure under various heating conditions[J]. China Safety Science Journal, 2024 , 34 (9) : 114 -120 . DOI: 10.16265/j.cnki.issn1003-3033.2024.09.0647
超薄型钢结构防火涂料因其涂层薄、装饰性好等特点而被广泛应用于厂房、机场、车站、换流站等大空间建筑,但其隔热性能受升温条件和涂层厚度等因素影响[1-3]。目前,国内外主要依据标准火灾升温条件测试防火涂料的隔热性能,并以此指导实际火灾场景下防火涂层的设计[4-5]。换流站作为一个特殊场所,除了可能发生常见的标准火灾外,大量的电力设备如电缆、电线等存在电力火灾隐患,同时,内部储存大量的变压器油易在变压器故障、高温情况下发生泄漏并燃烧,出现更为严重的碳氢火灾。因此,有必要分析标准火灾下钢结构防火涂料的隔热性能。
目前,相关学者对不同火灾条件下钢结构防火涂料的隔热性能开展了一系列研究。LI Guoqiang等[6]研究了标准火灾下钢构件截面形状系数及涂层厚度对超薄型防火涂料隔热性能的影响。王玲玲等[7-8]测试了IOS834标准火灾及3条非标准火灾曲线下防火涂层的隔热性能,探讨了升温速率和最高温度对涂层隔热性能的影响,且对比了不同火灾下涂层的导热系数。JIMENEZ等[9]对碳氢火灾下的防火涂层进行了防火测试,并分析研究其膨胀倍率。ANDERSON等[10]测试了航空燃油火灾下防火涂层的隔热性能,开发了一种程序来估算膨胀炭层的有效热导率。CIRPICI [11]、ZHANG Yeqin[12]等研究了不同加热条件下膨胀涂层的膨胀率和导热系数,预测了不同火灾条件下有涂层保护的钢材温度。
目前,针对钢结构防火涂料在标准、电力及碳氢3种火灾下隔热性能的差异性研究尚无报道,且在防火性能测试中往往只测试单一类型、尺寸的钢质基体。鉴于此,笔者拟以超薄型钢结构防火涂料、不同截面形状系数的碳钢和不锈钢为研究对象,基于标准、电力及碳氢3种火灾升温条件,探究不同火灾下超薄型钢结构防火涂料的热解机制和隔热性能,以期为钢结构抗火性能的准确评估提供借鉴。
火灾高温下,超薄型钢结构防火涂料经历熔融、膨胀、固化、失炭等一系列反应,火场温度影响涂层所能经历的反应过程,进而涂料呈现出不同的膨胀倍率和泡孔尺寸[7],最终表现出不同的隔热性能。文中通过耦合微尺度热重-红外光谱(Thermogravimetric-Fourier Transform Infrared,TG-FTIR) 联用热解试验与小尺度耐火试验炉隔热试验,综合分析3种火灾升温条件下超薄型钢结构防火涂料的热解机制与隔热性能。
试验所使用的防火涂料是超薄型钢结构防火涂料,符合国标《钢结构防火涂料》[4]。该防火涂料是一种白色黏稠液体,主要成分包括聚磷酸铵、三聚氰胺、季戊四醇和丙烯酸乳液等。经实验室测定,该款防火涂料的黏结强度为0.71 MPa(碳钢基体)、0.65 MPa(不锈钢基体),远大于国标中要求的0.15 MPa,性能优异。
试样基材为Q235钢和201不锈钢,选取尺寸分别为200 mm×150 mm×2 mm、200 mm×150 mm×4 mm与200 mm×150 mm×8 mm的钢构件进行试验,钢构件遭遇火灾时,截面形状系数对其升温有重要影响,截面形状系数是钢构件的受火表面积F与其相应的体积V之比[13]。3种试件对应的截面形状系数F/V=500、250及125 m-1。将防火涂料刷涂在钢构件上,利用涂层测厚仪控制涂层的厚度为(1.5±0.1)mm。
将防火涂料研磨成细小粉末,采用TG分析仪和FTIR仪在氮气气氛中进行3种升温程序下(标准火灾、电力火灾及碳氢火灾升温曲线)的TG-FTIR联用试验。温度范围设置为室温到1 000℃,在整个试验过程中,使用100 mL/min的高纯氮气作为吹扫气体。
将试件固定于耐火试验炉上(图1),涂层朝里,钢构件背火面覆盖一层硅酸铝纤维棉,同时,试件周边与试验炉固定安装间隙处也填塞硅酸铝纤维棉。试验时未施加荷载,炉内升温程序按照标准、电力及碳氢火灾升温曲线设定,并且采用5支热电偶紧贴钢板背火面,测量不同火灾升温中钢板背火面的温升变化。钢结构防火涂料的耐火极限以试件达到规定的平均温度的时间来确定,参照文献[4],将钢构件背火面平均温度到达538℃的时间作为其耐火极限。
标准、电力及碳氢3种火灾升温曲线[14]的数学表达式分别为:
T 1 = 345 l g 8 t + 1 ) + T 0
T 2 = 1   030 ( 1 - 0.325 e x p ( - 0.167 t ) - 0.675 e x p ( - 2.5 t ) ) + T 0
T 3 = 1   080 ( 1 - 0.325 e x p ( - 0.167 t ) - 0.675 e x p ( - 2.5 t ) ) + T 0
式中:t为测试开始时的时间,min(式(2)、式(3)中作无量纲化处理);T0为试验开始前的环境温度,℃;T1T2T3分别为标准、电力及碳氢3种火灾对应于相关时间t的升温温度,℃。3种火灾升温曲线的理论值和试验值如图2所示。
防火涂料在不同火灾升温下的质量损失速率曲线如图3所示。标准、电力及碳氢火灾升温曲线下防火涂料的质量损失速率峰值温度分别为756、789及817℃,火灾升温速率越快,质量损失速率峰值越大,峰值温度也更高。
根据图3可将防火涂料的热解过程划分为2个阶段。
阶段I:30~600℃,主要是填料在热解过程中释放H2O、NH3和CO2,而少量的树脂和季戊四醇在加热下分解,释放出H2O和其他小分子物质[15-16]。三聚氰胺分解产生的气体和酯化反应产生的水蒸气使熔融体系发泡。该阶段减少的主要成分是防火涂料中未挥发的水分、高聚物中未交联的小分子和其他易挥发物质[17]
阶段II:600~1 000℃,该阶段防火涂料中的聚磷酸铵受热分解释放出阻燃性气体,如CO2、 H2O和NH3等,同时反复生成催化剂聚偏磷酸和磷酸[18-19]
通过红外光谱中的特征峰可确定防火涂料在热解过程中主要逸出气体的种类,以400℃的红外光谱结果为例,不同火灾下防火涂料在400℃时的吸收光谱,如图4所示。主要逸出气体包括CO2、H2O、NH3等。由图4可知:不同火灾升温曲线对防火涂料受热分解逸出的气体类型并无明显影响,但对逸出气体量和逸出峰值温度有影响。
利用以上试验结果可近似将防火涂料热解2个阶段的反应过程总结如下:
阶段I:
$\begin{array}{c} \left(\mathrm{NH}_{4}\right)_{(n+2)} \mathrm{P}_{n} \mathrm{O}_{(3 n+1)} \rightarrow n \mathrm{H}_{3} \mathrm{PO}_{4}+\mathrm{NH}_{3} \\ \mathrm{H}_{3} \mathrm{PO}_{4} \rightarrow \mathrm{HPO}_{3}+\mathrm{H}_{2} \mathrm{O} \\ \mathrm{C}_{5} \mathrm{H}_{12} \mathrm{O}_{4}+\mathrm{H}_{3} \mathrm{PO}_{4+} \mathrm{HPO}_{3} \rightarrow \mathrm{C}+\mathrm{H}_{2} \mathrm{O}+\mathrm{C}_{5} \mathrm{H}_{9} \mathrm{O}_{5} \mathrm{P} \\ \text { Acrylicresin } \rightarrow \text { Residue }+\mathrm{CO}_{2} \\ \mathrm{C}_{3} \mathrm{H}_{6} \mathrm{~N}_{6} \rightarrow \mathrm{NH}_{3}+\mathrm{C} \end{array}$
阶段II:
$\begin{array}{c} \left(\mathrm{NH}_{4}\right)_{(n+2)} \mathrm{P}_{n} \mathrm{O}_{(3 n+1)} \rightarrow \mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}+ \\ \left(\mathrm{HPO}_{3}\right)_{n}+\mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{O} \\ \mathrm{C}_{5} \mathrm{H}_{9} \mathrm{O}_{5} \mathrm{P} \rightarrow \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{P}_{2} \mathrm{O}_{5} \\ \text { Acrylicresin } \rightarrow \text { Residue }+\mathrm{CO}_{2} \end{array}$
防火涂料热解过程中部分逸出气体将被捕获在膨胀涂层内,导致防火涂料膨胀[20],从而对其隔热性能产生重要影响。为进一步比较不同火灾情况下防火涂料热解逸出气体演化特征,选取典型气体CO2和H2O,其变化情况如图5所示。
750℃之前,虽然标准火灾升温曲线下防火涂层热解逸出的CO2气体量与电力、碳氢火灾升温曲线基本相同,然而,逸出的H2O气体量始终明显高于电力和碳氢火灾,导致防火涂料可以在较低温度时更好地发泡膨胀,更快地起到抗火隔热的效果。即对于电力、碳氢火灾升温曲线的加热速率,在涂层黏度较低的最佳膨胀窗口(250~400 ℃[11])期间,电力和碳氢火灾升温下防火涂料释放的气体量较少,涂层并没有达到标准火灾升温下的膨胀效果,导致较差的隔热性能。
测试超薄型钢结构防火涂料在不同火灾下的隔热性能后,汇总相关结果,如图6所示。以F/V=250 m-1的碳钢基体构件为例,分析标准、电力及碳氢火灾下防火涂层及裸钢构件的耐火极限差异。从图6可以发现,防火涂层在标准火灾下的隔热性能良好,耐火极限达到120 min以上,但是电力和碳氢火灾下,其耐火极限减少至60~70 min。防火涂层在电力和碳氢火灾下的耐火极限相对标准火灾而言有50%以上的降幅。
此外,火灾升温后防火涂层的形貌如图7所示。可以看出,防火涂层受火核心区域为白色无机残余物,标准火灾和非标准火灾升温曲线下的防火涂层膨胀效果存在差异,但涂层都出现了开裂和涂层与基材的剥离现象。此外,图7a的泡孔尺寸明显偏大,即火灾升温较慢的情况下,气体释放时涂层的黏滞性小,导致气体扩散形成的泡孔尺寸较大,体现出更好的隔热性能。电力及碳氢火灾下,由于升温速率快,导致防火涂层未能充分形成泡孔丰富的碳化层,故其隔热性能表现不佳,这也进一步印证了2.1节从微尺度试验角度所分析的防火涂料在不同升温曲线下隔热性能存在差别的原因。
除分析不同火灾下防火涂料隔热性能差异外,对不同规格和不同材质基体的分析也同样重要。以危险性最高的碳氢火灾升温曲线为例,对涂覆超薄型钢结构防火涂料的碳钢和不锈钢进行多种截面形状系数的抗火隔热试验,并与无防火保护的钢构件对比。
不同截面形状系数的碳钢构件在碳氢火灾下的耐火极限变化如图8所示。得益于防火涂料的有效保护,F/V=500、250、125 m-1的钢构件背火面平均温度在火灾升温600 s之后温度变化幅度很小,分别在550、500、450℃范围微小波动。最后F/V=500、250 m-1的钢构件背火面温度分别在55.1、60.7 min达到耐火极限。而F/V=125 m-1的钢构件耐火极限大于120 min,这主要是由于其截面形状系数小,隔热性能更佳。
此外,碳氢火灾下无防火保护的F/V=500、250、125 m-1的碳钢构件背火面平均温度分别于2.2、3.4、5.1 min达到耐火极限。即在换流站环境中,无防火保护或者防火涂料脱落的钢构件在遭遇火灾时十分不安全。对于有防火保护的F/V=500、250、125 m-1的钢构件,其耐火极限分别提高52.9、57.3、114.9 min,即该防火涂层可以有效延长钢构件耐火极限。
文献[520]在防火涂层隔热性能测试中往往只选用单一类型的钢材,然而,作为防火涂层保护的对象,除换流站中常用的碳钢外,还有封堵系统中常用的不锈钢[20]。不同截面形状系数的不锈钢构件在碳氢火灾下的耐火极限变化如图9所示。在900 s之后有防火保护的钢构件其背火面温度相对裸钢,温差达到近200℃。最后有防火保护的F/V=500、250 m-1的钢构件背火面温度分别在60.4、71.2 min达到耐火极限。
同时,对比图8图9可以很明显地观察到,不锈钢构件相对碳钢构件,其耐火极限有一定程度延长。即不同材质的钢构件背火面温度是不同的,这与钢材的导热系数有关,不锈钢具有15 W/(m·K)的低导热系数,而碳钢的导热系数为45 W/(m·K)。由于不锈钢相对碳钢含有更多的铬、镍、锰等合金元素,从而影响到其导热系数和温度变化[20]
超薄型钢结构防火涂料在不同截面形状系数碳钢和不锈钢基体中,相比标准火灾,在电力和碳氢火灾中隔热性能显著降低,甚至可产生高达50%以上降幅。因此,为满足换流站及特高压建设的高运行可靠性、高防护裕度要求,其防火安全设计将更为严苛,并为特种钢结构防火涂料的进一步研发提出了新的需求。
1) 标准、电力和碳氢3种火灾升温曲线对超薄型防火涂料热解逸出气体类型并无显著影响,但在标准升温速率曲线下,涂料在较低温度下逸出更多热解气体,从而达到更好的发泡效果,表现出更好的隔热性能。
2) 超薄型钢结构防火涂料对钢构件隔热性能提升明显,不锈钢构件相对于碳钢构件,其耐火极限有一定程度的延长。
3) 钢构件在多种截面形状系数下,相比于标准火灾,超薄型钢结构防火涂料在电力和碳氢火灾下的耐火极限显著降低,甚至降幅可高达50%。
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2024年第34卷第9期
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doi: 10.16265/j.cnki.issn1003-3033.2024.09.0647
  • 接收时间:2024-02-22
  • 首发时间:2025-07-09
  • 出版时间:2024-09-28
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  • 收稿日期:2024-02-22
  • 修回日期:2024-05-21
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国家电网公司科技项目(5500-202216111A-1-1-ZN)
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    1 国网安徽省电力有限公司电力科学研究院 电力火灾与安全防护安徽省重点实验室(国家电网公司输变电设施火灾防护实验室),安徽 合肥 230601
    2 中国地质大学(武汉) 工程学院,湖北 武汉 430074

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** 丁彦铭(1989—),男,山东威海人,博士,教授,博士生导师,主要从事火灾安全和智慧应急等方面的研究。E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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