超声断层成像技术在UHPC连接构件内部缺陷检测的应用研究  

Application Research of Ultrasonic Tomography Technology in Internal Defect Detection of UHPC Connecting Components

作　　者：陈皓 石齐 李洁 薛盛龙 魏友 Chen Hao;Shi Qi;Li Jie;Xue Shenglong;Wei You(Jiangxi Building Materials Product Quality Supervision and Inspection Station Co.Ltd.,Nanchang,Jiangxi 330001;Jiangxi Building Materials Research and Design Institute Co.Ltd.,Nanchang,Jiangxi 330001;School of Civil Engineering&Architecture,East China Jiaotong University,Nanchang,Jiangxi 330013)

机构地区：[1]江西省建材产品质量监督检验站有限公司,江西南昌330001 [2]江西省建材科研设计院有限公司,江西南昌330001 [3]华东交通大学土木建筑学院,江西南昌330013

出　　处：《江西建材》2024年第12期92-94,108,共4页

基　　金：江西省重点研发计划项目《基于UHPC连接的新型装配式建筑结构关键技术研究》(项目编号:20212BBG71010)

摘　　要：文中设计制作了三种不同连接长度的UHPC后浇梁构件,采用超声断层成像技术对构件在受弯破坏前后的内部缺陷进行检测,并在UHPC与普通混凝土界面位置进行钻孔取芯。结果表明,采用超声断层成像技术检测构件内部缺陷时,应结合设计图纸排除钢筋强反射点;构件受弯破坏后,超声波成像图中的强反射区域明显增多;超声断层成像检测结果与破损取芯结果吻合度较高。超声断层成像技术具有成果直观、检测效率高等优点,在UHPC连接构件内部缺陷无损检测中具有良好的应用前景。Three types of UHPC post cast beam with different connection lengths were designed and manufactured in this paper.Ultrasonic tomography technology was used to detect internal defects of the components before and after bending failure,and core sampling verification was conducted on the interface position between UHPC and ordinary concrete.The results indicate that strong reflection points of steel bars should be excluded in conjunction with the design drawings when using ultrasonic tomography technology to detect internal defects in components;strong reflection area in the ultrasonic imaging images increases significantly after bending failure;ultrasonic tomography detection results are consistent with the damaged core sampling results.Ultrasonic tomography technology has the advantages of intuitive results and high detection efficiency,and has good application prospects in non-destructive testing of internal defects in UHPC connecting components.

关 键 词：超高性能混凝土 无损检测 超声成像 缺陷 

分 类 号：TU352[建筑科学—结构工程]