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浙江大学学报(工学版)  2017, Vol. 51 Issue (8): 1482-1493    DOI: 10.3785/j.issn.1008-973X.2017.08.002
土木与交通工程     
耐火钢-混凝土组合梁耐火极限和承载力
蒋翔, 童根树, 张磊
浙江大学 建筑工程学院, 浙江 杭州, 310058
Fire resistance and bending bearing capacity of fire-resistant steel-concrete composite beams
JIANG Xiang, TONG Gen-shu, ZHANG Lei
Department of Givil Engineering Zhejiang University, Hangzhou 310058, China
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摘要:

为了得到标准升温下耐火钢-混凝土组合梁截面抗弯极限承载力-时间曲线和一定荷载比下组合梁的耐火极限,基于舞钢耐火钢Q345-FR钢板高温力学性能试验结果,采用有限元方法对耐火钢-混凝土组合梁的抗火性能进行高温稳态分析和瞬态分析.考察混凝土板尺寸、钢梁截面尺寸、涂料厚度、荷载比等参数对高温下组合梁承载力和耐火极限的影响.提出耐火钢组合梁高温下承载力和耐火极限计算公式,公式计算结果与有限元结果非常吻合.将有限元计算结果与规程CECS200:2006方法的计算结果进行对比分析,结果表明规程方法偏于保守,受火时间越长,保守程度越大;建议将腹板和下翼缘的温度分开计算,修正后的规范方法计算耐火钢-混凝土组合梁的抗火性能更为合理.

Abstract:

The fire performances of FRSCCB at both steady and transient state were analyzed based on the high-temperature mechanical properties of the Q345 fire-resistant steel produced by the Wuyang Iron and Steel Co. Ltd. in order to analyze the fire resistance time and the bending bearing capacity of fire-resistant steel-concrete composite beams (FRSCCB).The effects of the section size of concrete slab and steel beam, the load-ratio and the fire-insulation thickness of the steel beam on both the fire resistance time and the bending bearing capacity were analyzed. The simplified calculation formulas for predicting the bending bearing capacity and the fire resistance time were deduced with high accuracy compared with the finite element (FE) results. The FE results were compared with the bending bearing capacity predicted by Chinese code CECS200:2006. The code method is over conservative when the fire duration time is long. The temperature of the web is suggested to be calculated separately from that of the bottom flange. It is more reasonable to analyze the fire resistance of the FRSCCB by the improved method.

收稿日期: 2016-07-15 出版日期: 2017-08-16
CLC:  TU352  
基金资助:

国家"十二五"科技支撑计划资助项目(2012BAJ13B04).

通讯作者: 童根树,男,教授,博导.ORCID:0000-0002-3985-8425.     E-mail: tonggs@zju.edu.cn
作者简介: 蒋翔(1989-),男,博士生,从事钢结构稳定性和抗火等研究.ORCID:0000-0002-9164-3452.E-mail:civilj@zju.edu.cn
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引用本文:

蒋翔, 童根树, 张磊. 耐火钢-混凝土组合梁耐火极限和承载力[J]. 浙江大学学报(工学版), 2017, 51(8): 1482-1493.

JIANG Xiang, TONG Gen-shu, ZHANG Lei. Fire resistance and bending bearing capacity of fire-resistant steel-concrete composite beams. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(8): 1482-1493.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.08.002        http://www.zjujournals.com/eng/CN/Y2017/V51/I8/1482

[1] 李国强.钢结构及钢-混凝土组合结构抗火设计[M].北京:中国建筑工业出版社,2006:3-8.
[2] DING Jun, LI Guo-qiang, Sakumoto Y. Parametric studies on fire resistance of fire-resistant steel members[J]. Journal of Constructional Steel Research, 2004, 60(7):1007-1027.
[3] 完卫国,吴结才.耐火钢的开发与应用综述[J].建筑材料学报,2006,9(2):183-189. WAN Wei-guo, WU Jie-cai. Review of research and applications of fire-resistant steel[J]. Journal of Building Materials, 2006, 9(2):183-189.
[4] GARCÍA H, BIEZMA M V, CUADRADO J, et al. Study of historical developments in the use of fire resistant steels[J]. Materials at High Temperatures, 2013, 30(4):313-319.
[5] WAN Rong-chun, SUN Feng, ZHANG Lan-ting, et al. Effects of Mo on high-temperature strength of fire-resistant steel[J]. Materials & Design, 2012, 35(Complete):335-341.
[6] SAKUMOTO Y, SAITO H. Fire-safe design of modern steel buildings in Japan[J]. Journal of Constructional Steel Research, 1995, 33(1):101-123.
[7] 蒋首超,陆立新,李国强,等.马钢耐火钢高温下材料性能试验研究[J].土木工程学报,2006,39(8):72-75. JIANG Shou-chao, LU Li-xin, LI Guo-qiang, et al. An experimental study on high-temperature properties of fire-resistant steel made by Masteel[J]. China Civil Engineering Journal, 2006, 39(8):72-75.
[8] CHUNG H Y, LEE C H, SU W J, et al. Application of fire-resistant steel to beam-to-column moment connections at elevated temperatures[J]. Journal of Constructional Steel Research, 2010, 66(2):289-303.
[9] KWON In-Kyu. Experimental study on making databases for fire resistant steel at high temperature[J]. 2013, 27(5):1-7.
[10] 刘逸祥,童根树,张磊.耐火钢圆钢管混凝土柱耐火极限和承载力[J].浙江大学学报:工学版,2015,49(2):208-217. LIU Yi-xiang, TONG Gen-shu, ZHANG Lei. Fire resistance and load-bearing capacity of concrete filled fire-resistant steel tubular columns with circular cross-section[J]. Journal of Zhejiang University:Engineering Science, 2015, 49(2):208-217.
[11] 刘逸祥,童根树,张磊.耐火钢-钢管混凝土柱的防火保护层厚度[J].浙江大学学报:工学版,2015,49(12):2387-2396. LIU Yi-xiang, TONG Gen-shu, ZHANG Lei. Fire protection thickness of concrete filled fire resistant steel tubular columns[J]. Journal of Zhejiang University:Engineering Science, 2015, 49(12):2387-2396.
[12] WANG Y C. Performance of steel-concrete composite structures in fire[J]. Progress in Structural Engineering & Materials, 2005, 7(2):86-102.
[13] 宋天诣,韩林海.组合结构耐火性能研究的部分新进展[J].工程力学,2008,25(增刊Ⅱ):230-253. SONG Tian-yi, HAN Lin-hai. Some new developments of the fire performance research on composite structures[J]. Engineering Mechanics, 2008, 25(suppl 2):230-253.
[14] 余志武,丁发兴.钢-混凝土组合结构抗火性能研究与应用[J].建筑结构学报,2010,31(6):96-109. YU Zhi-wu, DING Fa-xing. Fire performance research and application on steel-concrete composite structures[J]. Journal of Building Structures,2010,31(6):96-109.
[15] 王卫永,李国强.钢-混凝土组合梁抗火性能研究综述[J].建筑钢结构进展,2014,16(5):1-8. WANG Wei-yong, LI Guo-qiang. A state-of-the-art review on fire resistance of steel-concrete composite beams[J]. Progress in Steel Building Structures, 2014, 16(5):1-8.
[16] 毛小勇,肖岩.标准升温下轻钢-混凝土组合梁的抗火性能研究[J].湖南大学学报:自然科学版,2005,32(2):64-70. MAO Xiao-yong, XIAO Yan. Behavior of light weight steel-concrete composite beams subjected to standard fire[J]. Journal of Hunan University:Natural Science, 2005, 32(4):64-70.
[17] 李国强,周宏宇.钢-混凝土组合梁抗火性能试验研究[J].土木工程学报,2007,40(10):19-26. LI Guo-qiang, ZHOU Hong-yu. Experimental study on the fire-resistance of steel-concrete composite beams[J]. China Civil Engineering Journal, 2007, 40(10):19-26.
[18] 王银志,李国强.考虑结构整体性的组合梁抗火性能研究[J].自然灾害学报,2008,17(3):96-105. WANG Yin-zhi, LI Guo-qiang. Research on fire-resistance capacity of composite beams with considering structural integrity[J]. Journal of Natural Disasters, 2008,17(3):96-105.
[19] 董毓利,王德军.框架组合梁抗火性能试验[J].哈尔滨工业大学学报,2008,40(2):178-182. DONG Yu-li, WANG De-jun. Experimental study on behavior of frame composite steel beams in fire[J]. Journal of Harbin Institute of Technology, 2008, 40(2):178-182.
[20] 吕俊利,董毓利,杨志年.单跨组合梁火灾变形性能研究[J].哈尔滨工业大学学报,2011,43(8):16-20. LV Jun-li, DONG Yu-li, YANG Zhi-nian. Deformation investigation of single-span composite beam subjected to fire[J]. Journal of Harbin Institute of Technology, 2011, 43(8):16-20.
[21] 高轩能,黄文欢,朱皓明.冷弯薄壁槽钢-混凝土组合梁受火试验研究[J].建筑结构学报,2012,33(5):141-149. GAO Xuan-neng, HUANG Wen-huan, ZHU Hao-ming. Experimental research on cold-formed thin-walled channel steel concrete beam exposed to fire[J]. Journal of Building Structures, 2012, 33(5):141-149.
[22] MIRZA O, UY B. Behaviour of headed stud shear connectors for composite steel-concrete beams at elevated temperatures[J]. Journal of Constructional Steel Research, 2009, 65(3):662-674.
[23] WANG A J. Numerical studies on shear connectors in push-out tests under elevated temperatures[J]. Structural Engineering & Mechanics, 2011, 39(3):317-338.
[24] CECS200.2006建筑钢结构防火技术规范[S].北京:中国计划出版社, 2006. CECS200. 2006 Technical Code for fire safety of steel structure in buildings[S]. Beijing:China Planning Press, 2006.
[25] BS 5950. The structural use of steelwork in buildings, part 8:code of practice for fire resistant design[S]. London:British Standards Institution (BSI) 1990.
[26] 蒋翔,童根树,张磊.耐火钢-混凝土组合梁抗火性能非线性有限元分析[J].钢结构,2016,31(3):29-34. JIANG Xiang, TONG Gen-shu, ZHANG Lei. Nonlinear FEM modeling of fire-resistance of fire-resistant steel-concrete composite beams[J]. Steel Construction, 2016, 31(3):29-34.
[27] 蒋翔,童根树,张磊.耐火钢-混凝土组合梁抗火性能试验[J].浙江大学学报:工学版, 2016, 50(8):1463-1470. JIANG Xiang, TONG Gen-shu, ZHANG Lei. Experimental study on the fire-resistance of fire-resistant steel-concrete composite beams[J]. Journal of Zhejiang University:Engineering Science, 2016, 50(8):1463-1470.
[28] 周宏宇,李国强,王银志.简支组合梁抗火性能参数研究[J].钢结构,2005,20(06):92-96. ZHOU Hong-yu, LI Guo-qiang, WANG Yin-zhi. Parametric studies on fire-resistance of simply-supported steel-concrete composite beams[J]. Steel Construction, 2005, 20(6):92-96.
[29] EN 1994-1-2. Design of composite steel and concrete structures-part1-2:general rules-structural fire design[S]. Brussels:European committee for standardization, 2005.

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