高温环境下耐火钢Q235FRB力学性能试验研究

张泽宇; 曾立静; 李红旭; 蒋录珍; 王月栋; 侯兆新; 李伟男

doi:10.13206/j.gjgS24051601

高温环境下耐火钢Q235FRB力学性能试验研究

doi: 10.13206/j.gjgS24051601

张泽宇^1,3,
曾立静^1,3, ,,
李红旭^1,2,
蒋录珍²,
王月栋^1,3,
侯兆新^1,3,
李伟男⁴

1. 中冶建筑研究总院有限公司, 北京 100088;
2. 河北科技大学建筑工程学院, 石家庄 050018;
3. 国家钢结构工程技术研究中心, 北京 100088;
4. 中国京冶工程技术有限公司钢结构公司, 北京 100088

基金项目:

国家重点研发计划(2018YFC0705502)。

济宁市重点研发计划"全球揭榜"项目(2022JBZP004)

中国中冶"181计划"重大研发项目(YJY2023kt01)

详细信息

作者简介:
张泽宇,博士,高级工程师,主要从事装配式钢结构方面的研究,2008.zzy.good@163.com

通讯作者:
曾立静,博士,工程师,主要从事高性能钢结构方面的研究,zengljcn@163.com

计量
- 文章访问数: 72
- HTML全文浏览量: 14
- PDF下载量: 10
- 被引次数: 0
出版历程
- 收稿日期: 2024-05-16
- 网络出版日期: 2024-11-06

Experimental Investigation on Mechanical Properties of Fire-Resistant Steel Q235FRB at Elevated Temperature

1. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China;
2. School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China;
3. National Steel Structure Engineering Technology Research Center, Beijing 100088, China;
4. Steel Structure Branch, China Jingye Engineering Technology Co., Ltd., Beijing 100088, China

摘要

摘要: 为了研究耐火钢在高温环境下的力学性能,采用高温稳态试验方法进行耐火钢Q235FRB标准件的拉伸试验。基于试验结果,得到了不同温度条件下耐火钢Q235FRB的应力-应变曲线,据此给出了高温下耐火钢各项力学性能参数指标(包括弹性模量、屈服强度、抗拉强度)的折减系数。研究结果表明,耐火钢Q235FRB的强度指标(包括弹性模量、屈服强度、抗拉强度)与温度基本呈负相关关系,并提出了对应计算模型。当温度达到400℃时,强度指标劣化速率加快,温度升至800℃时,强度指标基本为常温性能的10%。耐火钢Q235FRB的变形指标(极限伸长率)基本随着温度的升高呈先减小后增大的趋势。通过对比分析,耐火钢Q235FRB的力学性能和耐高温性能优于同等级普通钢,具有广泛应用前景。
- 耐火钢Q235FRB /
- 高温环境 /
- 试验研究 /
- 力学性能
Abstract: To investigate the mechanical properties of fire-resistant steel under elevated-temperature conditions, a steady-state method was used to conduct tensile experiments on standard specimens of fire-resistant steel Q235FRB. Based on the experimental results, stress-strain curves of fire-resistant steel Q235FRB under different temperature conditions were obtained, from which reduction factors for various mechanical performance parameters of fire-resistant steel (including elastic modulus, yield strength, and tensile strength) at elevated temperatures were obtained. The research results indicate that the strength parameters of fire-resistant steel Q235FRB (including elastic modulus, yield strength, and tensile strength) exhibit a negative correlation with temperature, and corresponding calculation models are proposed. When the temperature reaches 400 ℃, the degradation rate of strength parameters accelerates, with strength parameters reaching approximately 10% of room-temperature performance when the temperature rises to 800 ℃. The deformation parameter (ultimate elongation) of fire-resistant steel Q235FRB decreases first and then increases with the increase of temperature. Through comparative analysis, it is demonstrated that the mechanical and high-temperature resistance properties of fire-resistant steel Q235FRB surpass those of equivalent-grade ordinary steel, show casing promising application prospects.
- fire-resistant steel Q235FRB /
- elevated-temperature environment /
- experimental research /
- mechanical properties

HTML全文

参考文献(24)

[1]	余香林,石永久,彭耀光,等.新型耐火耐候钢材高温力学性能与本构模型研究[J].工程力学,2023,40(3):201-212.
[2]	张泽宇,李红旭,赵国川,等.耐火钢结构应用研究现状与发展趋势[C]//2022年工业建筑学术交流会论文集(下册).北京:2022.
[3]	李红旭.耐火钢材料不同温度下力学性能研究[D].石家庄:河北科技大学,2020.
[4]	Qiang X H, Jiang X, Bijlaard F, et al. Mechanical properties and design recommendations of very high strength steel S960 in fire[J]. Engineering Structures, 2016, 112: 60-70.
[5]	Ranawaka T, Mahendran M. Experimental study of the mechanical properties of light gauge cold-formed steels at elevated temperatures[J]. Fire Safety Journal, 2019, 44 (2): 219-229.
[6]	Kankanamge N D, Mahendran M. Mechanical properties of cold-formed steels at elevated temperatures[J]. Thin-Walled Structures, 2017, 49 (1): 26-44.
[7]	Choi I R, Chung K S, Kim D H. Thermal and mechanical properties of high-strength structural steel HSA800 at elevated temperatures[J]. Materials & Design, 2016, 63: 544-551.
[8]	Chiew S P, Zhao M S, Lee C K. Mechanical properties of heat-treated high strength steel under fire/post-fire conditions[J]. Journal of Constructional Steel Research, 2015, 98: 12-19.
[9]	刘兵, 王卫永, 李国强, 等. 高强度Q460钢柱抗火性能研究[J]. 土木工程学报, 2012, 45(9): 19-26.
[10]	李国强,黄雷,张超.国产Q690高强钢高温下力学性能试验研究[J].建筑结构学报,2020,41(2):149-156.
[11]	范圣刚,刘平,石可,等.高温下与高温后Q550D高强钢材料力学性能试验[J].天津大学学报(自然科学与工程技术版),2019,52(7):680-689.
[12]	陈伟, 叶继红. G550高强度冷成型钢高温力学性能稳态试验研究[J]. 土木工程学报, 2012, 45(6): 33-42.
[13]	Zhang C T, Liu Y F, Huang C L. Fatigue performance of Q345 structural steel after natural cooling from elevated temperatures[J]. Journal of Constructional Steel Research,2021, 184, 106811.
[14]	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(8):72-75.
[15]	楼国彪,费楚妮,王彦博,等.高强度耐火钢高温下力学性能试验研究[J].建筑结构学报,2022,43(9):128-137.
[16]	Chen J, Young B, Uy B. Behavior of high strength structural steel at elevated temperatures[J]. Journal of Structural Engineering, 2016, 7 (3): 331-363.
[17]	中华人民共和国国家质量监督检验检疫总局. 金属材料拉伸试验第1部分: 室温试验方法:GB/T 228.1—2021[S].北京: 中国标准出版社, 2021.
[18]	全国钢标准化技术委员会. 金属材料高温拉伸试验方法: GB/T 4338—2006[S]. 北京: 中国标准出版社, 2006.
[19]	阮诗鹏,赵金城,宋振森,等.蔓延火灾下钢框架结构抗火性能试验研究[J].建筑结构学报,2022,43(9):103-114.
[20]	Nadjai A, Naveed A, Charlier M, et al. Large scale fire test: the development of a travelling fire in open ventilation conditions and its influence on the surrounding steel structure[J]. Fire Safety Journal, 2022, 130, 103575.
[21]	强旭红,毋凯冬,姜旭,等.高强钢S460高温力学性能研究与抗火设计建议[J].湖南大学学报(自然科学版),2018,45(11):37-45.
[22]	李国强, 陈凯, 蒋首超, 等. 高温下Q345钢的材料性能试验研究[J]. 建筑结构, 2001, 31(1): 53-55.
[23]	赵金城. 高温下钢材力学性能的试验研究[J].建筑结构,2000,30(4):26-28.
[24]	全国钢标准化技术委员会. 耐火结构用钢板及钢带: GB/T 28415—2012[S]. 北京: 中国标准出版社, 2012.