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: 36
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- PDF下载量: 9
- 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

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