建筑钢结构进展2025，Vol.27Issue(7)：73-80,8.DOI:10.13969/j.jzgjgjz.20240224001
基于红外热成像的钢管混凝土脱空缺陷检测研究
Research on Detection of Gap Defect of Concrete-Filled Steel Tube Based on Infrared Thermal Imaging
摘要
Abstract
During the construction of concrete-filled steel tubular(CFST)members,the internal defects are caused by improper operation and shrinkage of concrete.Among them,the gap defect will weaken the interaction between steel tube and concrete,resulting in the decline of the bearing capacity of members.Therefore,it is necessary to strengthen the detection of the gap defect of CFST members.In this paper,a detection method based on infrared thermal imaging is proposed.Relevant theoretical studies show that when the structure is defective or damaged,the thermal physical characteristics of the part will change,which is reflected in the local temperature anomaly on the surface of the object.Infrared thermal imaging method was used to experimentally detect the gap defects of CFST member.The results show that the method can effectively detect the gap defects of CFST members.The detection indexes are as follows:the temperature difference after member heating is 3℃and the cooling rate ratio is greater than 1.1 in the monitoring range.关键词
钢管混凝土/红外热成像/脱空缺陷/无损检测/降温速率Key words
concrete-filled steel tube/infrared thermal imaging/gap defect/non-destructive testing/cooling rate分类
建筑与水利引用本文复制引用
何健,张佶,王航,钱娟,邵志伟,戴爽,查晓雄..基于红外热成像的钢管混凝土脱空缺陷检测研究[J].建筑钢结构进展,2025,27(7):73-80,8.基金项目
国家自然科学基金(52178129),深圳市科技计划项目(GJHZ20220913143007013、KCXST20221021111408021) （52178129）
