高性能耐火耐候钢-混凝土简支组合梁抗火性能的数值分析

程赟; 石永久; 王文昊; 班慧勇; 余香林

doi:10.13204/j.gyjzG21061614

高性能耐火耐候钢-混凝土简支组合梁抗火性能的数值分析

doi: 10.13204/j.gyjzG21061614

土木工程安全与耐久教育部重点实验室,清华大学土木工程系, 北京 100084

基金项目:

国家自然科学基金项目(51890903)。

详细信息

作者简介:
程赟,男,1998年出生,博士研究生。

通讯作者:
石永久,男,1962年出生,博士,教授,博士研究生导师,shiyj@tsinghua.edu.cn。

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- 文章访问数: 158
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- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2021-06-16
- 网络出版日期: 2022-06-30
- 刊出日期: 2022-02-20

Numerical Analysis on Fire Resistance of High-Performance Fire-Resistant and Weathering Steel-Concrete Composite Beams

Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 随着钢材冶炼技术发展,采用耐火耐候钢、闭口压型钢板提升钢-混凝土组合梁抗火性能成为钢结构抗火设计新方法。采用ABAQUS有限元软件,选取合理的材料高温热-力学性能参数和计算策略,并通过数值计算结果与钢-混凝土组合梁抗火性能试验结果对比,验证了数值模型的准确性与可靠性。以此为基准模型,改变材料热膨胀系数、荷载比、钢梁截面尺寸等参数,总结得出钢材热膨胀系数、钢梁高度、楼板厚度、荷载比对耐火耐候钢-混凝土简支组合梁耐火极限影响较大的结论,并基于参数化计算,分析数值模型计算组合梁正截面抗弯承载力与GB 51249—2017《建筑钢结构防火技术规范》中承载力法计算结果的差异,提出了标准升温下该型组合梁修正的承载力计算方法。
- 耐火耐候钢 /
- 简支钢-混凝土组合梁 /
- 抗火性能 /
- 计算方法
Abstract: With the development of steel-smelting technology, using fire-resistant and weathering steel and encased profiled steel sheets to promote the fire resistance of composite beams has become a new solution for steel structure fire design. Adopting appropriate thermo-mechanical material properties and calculating strategies, the accuracy and reliability of the numerical model were verified by comparing the results calculated in ABAQUS platform based on the experimental data from fire resistance tests of steel-concrete composite beams. Based on the proposed benchmark model, adopting different material thermal expansion coefficients, load ratios and steel beam sizes, conclusions were drawn that the thermal expansion coefficient, steel beam height, thickness of the composite slab and load ratio had a greater influence on the fire resistance of simply supported fire-resistant and weathering steel-concrete composite beams. By comparing the results calculated by the numerical model with those calculated by the bearing capacity method according to Code for fire safety of steel structures in buildings(GB 51249-2017), a modified bearing capacity method was proposed for the composite beams.
- fire-resistant and weathering steel /
- simply supported steel-concrete composite beam /
- fire resistance /
- designing method

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参考文献(22)

[1]	周宏宇.钢-混凝土组合梁抗火性能理论与试验研究[D].上海:同济大学, 2004.
[2]	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.
[3]	李国强,王银志,王孔藩.考虑结构整体的组合梁极限抗火性能分析[J].力学季刊, 2006, 27(4):726-732.
[4]	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):1463-1470.
[5]	王文昊,余香林,程赟,等.耐火耐候钢-混凝土组合梁抗火性能试验研究[J].建筑结构,2022.DOI: 10.19701/j.jzjg.20210685.
[6]	中华人民共和国住房和城乡建设部.建筑钢结构防火技术规范:GB 51249-2017[S].北京:中国建筑工业出版社, 2018.
[7]	European Committee for Standardization. Eurocode 4:design of composite steel and concrete structures-Part 1-2:general rules-structural fire design:EN 1994-1-2:2005[S]. Brussels:European Committee for Standardization, 2005.
[8]	GHANNAM M. Proposed models for concrete thermal expansion with different aggregate types and saturation conditions[J]. SN Applied Sciences, 2019, 1(5):1-13.
[9]	LIE T T, IRWIN R J. Fire Resistance of steel columns filled with bar-reinforced concrete[J]. Journal of Structural Engineering, 1995, 121(5):1489-1509.
[10]	李卫,过镇海.高温下砼的强度和变形性能试验研究[J].建筑结构学报, 1993, 14(1):8-16.
[11]	The International Federation for Structural Concrete. Fib model code for concrete structures 2010:MC 2010[S]. Berlin:Ernst&Sohn, 2013.
[12]	COOKE G. An introduction to the mechanical properties of structural steel at elevated temperatures[J]. Fire Safety Journal, 1988,13:45-54.
[13]	过镇海.钢筋混凝土原理[M].北京:清华大学出版社, 2013.
[14]	吴一然.高性能耐火钢焊接工形轴压构件高温整体稳定性能研究[D].北京:清华大学, 2019.
[15]	YU X L, SHI Y J, PENG Y G, et al. Mechanical properties of a newly developed fire-resistant steel at elevated temperatures[C]//SHIN K J. 11th International Symposium on Steel Structures (ISSS2021). Seoul:Korean Society of Steel Construction, 2021:389-392.
[16]	中华人民共和国住房和城乡建设部.钢结构设计标准:GB 50017-2017[S].北京:中国建筑工业出版社, 2018.
[17]	OLLGAARD J G, SLUTTER R G, FISHER J W. Shear strength of stud connectors in lightweight and normal weight concrete[J]. AISC Engineering Journal, 1971,71(10):55-64.
[18]	蒋首超,李国强,楼国彪,等.钢-混凝土组合楼盖抗火性能的数值分析方法[J].建筑结构学报, 2004, 25(3):38-44.
[19]	GUO L, LEI G, ZHONG L, et al. Thermal conductivity and heat transfer coefficient of concrete[J]. Journal of Wuhan University of Technology, 2011, 26(4):791-796.
[20]	LAMONT S, USMANI A S, DRYSDALE D D. Heat transfer analysis of the composite slab in the cardington frame fire tests[J]. Fire Safety Journal, 2001, 36(8):815-839.
[21]	JIANG S C, RANZI G, CHEN L Z, et al. Behaviour and design of composite beams with composite slabs at elevated temperatures[J]. Advances in Structural Engineering, 2016, 20(10):1451-1465.
[22]	中华人民共和国国家质量监督检验检疫总局.建筑构件耐火试验方法第1部分:通用要求:GB/T 9978.1-2008[S].北京:中国标准出版社, 2009.