锈蚀钢材既有裂纹缺陷启裂准则研究

张海江; 徐善华; 王友德; 王皓; 李晗

doi:10.3724/j.gyjzG24080902

锈蚀钢材既有裂纹缺陷启裂准则研究

doi: 10.3724/j.gyjzG24080902

1. 河北工程大学土木工程学院, 河北邯郸 056000;
2. 西安建筑科技大学土木工程学院, 西安 710000

基金项目:

河北省青年科学基金项目(E2023402018)

国家自然科学基金项目(52178165)。

详细信息

作者简介:
张海江,博士研究生,讲师,主要从事钢结构耐久性工作。电子信箱:zhjiang1994@sina.com

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出版历程
- 收稿日期: 2024-08-09
- 网络出版日期: 2025-03-28

Research on the Crack Initiation Criteria for the Existing Crack Defects in Corroded Steels

1. School of Civil Engineering, Hebei University of Engineering, Handan 056000, China;
2. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710000, China

摘要

摘要: 在恶劣环境中服役多年的钢结构工程,常常会同时遭受宏观裂纹和表面锈蚀的损伤作用。为恰当评价锈蚀钢结构中既有裂纹缺陷启裂门槛的降低程度,开展了锈蚀钢材既有裂纹缺陷启裂准则研究。通过含裂纹锈蚀钢板的拉伸试验和基于微观机理的断裂理论分析,建立了锈蚀钢材既有裂纹缺陷的启裂准则。结果表明,表面锈蚀大大降低了钢结构中既有裂纹缺陷的启裂临界荷载;根据锈蚀钢材裂尖区域孔洞萌生—变形的微观断裂机制,可以建立锈蚀钢材既有裂纹缺陷的启裂准则,且该启裂准则可以较好地计算含裂纹锈蚀钢板的断裂荷载。
- 锈蚀钢结构 /
- 裂纹缺陷 /
- 微观机制 /
- 启裂准则 /
- 断裂荷载
Abstract: Steel structures that have been in service in the harsh environment for many years, often suffer from macroscopic cracks and surface corrosion damage at the same time. In order to properly evaluate the reduction degree of crack initiation threshold of existing crack defects in corroded steel structures, the paper studied the crack initiation criteria for existing crack defects in corroded steels. Through the tensile tests of cracked corroded steel plates, and the fracture analysis based on microscopic mechanism, the fracture initiation criterion for existed crack defects in corroded steels was established.The results showed that surface corrosion greatly reduced the critical loads of the existing cracks in the steel structure. According to the micro fracture mechanism of hole initiation and deformation in the crack tip region of the corroded steel plates, the crack initiation criteria for the existing crack defects of the corroded steel plates could be established, and the fracture loads of the corroded steel plates with cracks could be better calculated.
- corroded steel structures /
- crack defects /
- microscopic mechanism /
- crack initiation criterion /
- breaking load

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