工业大气腐蚀环境下Q235钢屋架的力学性能研究

王风鲁, 韩腾飞, 李永录, 屈雨浓, 赵立勇

doi:10.16577/j.issn.1001-1560.2025.0109

材料保护 >

2025 , Vol. 58 >Issue 6: 174 - 181

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0109

应用技术

工业大气腐蚀环境下Q235钢屋架的力学性能研究

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1中冶建筑研究总院有限公司； 2中冶检测认证有限公司

王风鲁(1999－),硕士研究生,研究方向为结构检测鉴定,电话:15610125350,E-mail:smartwang＠tongji.edu.cn

收稿日期: 2025-01-07

修回日期: 2025-02-18

录用日期: 2025-02-20

网络出版日期: 2025-07-09

基金资助

中冶检测认证有限公司专项课题(2024ZYZX14)资助

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Study on the Mechanical Properties of Q235 Steel Roof Trusses in Industrial Atmospheric Corrosive Environment

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(1.Central Research Institute of Building and Construction Co., Ltd., MCC, Beijing 100088, China；2.Inspection and Certification Co., Ltd., MCC, Beijing 100088, China)

WANG Fenglu (1999－),Master,Research Focus:Structural Detection and Identification,Tel.:15610125350,E-mail: smartwang＠tongji.edu.cn

Received date: 2025-01-07

Revised date: 2025-02-18

Accepted date: 2025-02-20

Online published: 2025-07-09

Supported by

Inspection and Certification Co.,Ltd.MCC Special Project(2024ZYZX14)

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摘要

为研究工业大气环境下腐蚀对钢屋架杆件力学性能的影响，选取合适的强度退化模型与指标表征钢材力学性能的退化。从某钢渣处理厂钢屋架系统现场取样30 根Q235B 腐蚀钢材试件，在加工处理后，对试件进行单轴拉伸试验。通过剩余承载力假设对腐蚀钢材的力学性能退化模型进行理论研究，定性研究了各强度退化模型的意义。选择等效强度退化模型、综合腐蚀损伤参数表征腐蚀造成的强度退化。最后根据拉伸试验数据，定量分析了钢材强度退化与综合腐蚀损伤参数的规律。结果表明:等效屈服强度、等效抗拉强度随综合腐蚀损伤参数的增加而减小，退化速率分别为0.89、1.21，表明随着腐蚀的发展，钢材屈强比增加，更易发生脆性破坏；另外，伸长率也随综合腐蚀损伤参数的增加而降低，退化速率为1.29。

关键词： 工业大气; 腐蚀钢屋架; 剩余承载力; 强度退化模型

本文引用格式

王风鲁, 韩腾飞, 李永录, 屈雨浓, 赵立勇 . 工业大气腐蚀环境下Q235钢屋架的力学性能研究[J]. 材料保护, 2025 , 58(6) : 174 -181 . DOI: 10.16577/j.issn.1001-1560.2025.0109

Abstract

In order to investigate the impact of corrosion on the mechanical performance of steel roof truss membersin an industrial atmospheric environment, appropriate strength degradation models and indices were selected to characterize the deterioration of steel material properties.Thirty Q235B corroded steel specimens were sampled on-site from a steel slag processing plant’s roof truss system.After processing, uniaxial tensile tests were conducted on the specimens.The mechanical performance degradation model of corroded steel was theoretically analyzed based on the residual load-bearing capacity assumption, and the significance of various strength degradation models was qualitatively evaluated.An equivalent strength degradation model and a comprehensive corrosion damage parameter were chosen to represent the strength degradation caused by corrosion.Finally,based on the tensile test data,the relationship between steel strength degradation and the comprehensive corrosion damage parameter was quantitatively analyzed.Results showed that equivalent yield strength and equivalent tensile strength decreased with increasing comprehensive corrosion damage parameters, with degradation rates of 0.89 and 1.21, respectively, suggesting that as corrosion progressed, the ratio of yield to tensile strength increased, rendering the steel more susceptible to brittle failure.Additionally, the elongation diminished with increasing corrosion damage, with a degradation rate of 1.29.

Key words： industrial atmosphere; corroded steel roof trusses; residual bearing capacity; strength degradation model

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