东南大学学报（英文版）2022，Vol.38Issue(1)：1-8,8.DOI:10.3969/j.issn.1003-7985.2022.01.001
土木工程结构中铸钢节点的无损探伤试验结果统计分析
Statistical analysis of nondestructive testing results of cast steel joints in civil engineering structures
摘要
Abstract
To study the distribution law and random characteristics of casting defects in steel castings,24 civil engineering structural cast steel joints were divided into two groups:simple cast steel joints and complex cast steel joints.Three kinds of nondestructive testing(NDT)methods,namely,visual,magnetic particle,and ultrasonic inspections,were used to detect the macroscopic defects in joints.The NDT results were then statistically analyzed.The results show that the unfused core support is a common defect of complex cast steel joints,and the defect can be seen visually,so excavation and repair welding should be carried out before castings leave factories.Casting cracks are extremely likely to occur in the intersection area of tubes,which is called the ultrasonic inspection blind zone.The occurrence probability of gas pores on simple cast steel joints is the largest,and the occurrence probability of core support incomplete fusions on complex cast steel joints is the largest.However,when cast steel joints are counted as a whole sample,the occurrence probability of gas pores is larger than that of core support incomplete fusions.Therefore,it is the most common defect in cast steel joints.关键词
铸钢件/铸造缺陷/无损探伤/统计分析Key words
steel casting/casting defect/nondestructive testing/statistical analysis分类
建筑与水利引用本文复制引用
成佳明,高一祺,闫华东,孙思嘉,靳慧..土木工程结构中铸钢节点的无损探伤试验结果统计分析[J].东南大学学报（英文版）,2022,38(1):1-8,8.基金项目
The National Key R&D Program of China(No.2017YFC0805100),the National Natural Science Foundation of China(No.51578137),the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions,the Open Research Fund Program of Jiangsu Key Laboratory of Engineering Mechanics. （No.2017YFC0805100）
