基于压电阻抗的钢管砼柱横隔板剥离缺陷检测  

Interface Debonding Detection of Diaphragm for Large-scale Irregular CFST Column Based on Electro-mechanical Impedance of PZT

作　　者：许斌[1] 陈梦琦 王海东[1] 余地华 侯玉杰 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南城建职业技术学院建筑工程系,湖南湘潭411101 [3]中国建筑第三工程局,湖北武汉430074

出　　处：《压电与声光》2015年第1期172-175,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金面上资助项目(51278185);湖南省科技计划重点基金资助项目(2014TT1006)

摘　　要：该文提出了一种基于压电阻抗测量的大型不规则多腔钢管混凝土柱中横隔板下与核心混凝土的界面剥离缺陷检测方法。在横隔板上、下表面粘贴压电陶瓷片并在横隔板以下混凝土中嵌入压电功能元,对压电材料的机电耦合阻抗进行测量,结果表明,界面剥离缺陷区域的压电陶瓷片和嵌入式压电功能元的阻抗测量结果出现明显变化。通过机电耦合阻抗测量可实现大型不规则钢管混凝土柱横隔板下表面与混凝土的界面粘结缺陷的有效检测。In this paper,a debonding detection methodology for the interface between the lower surface of horizontal diaphragms and the concrete core of large scale irregular multi-cellular concrete-filled steel tubulars（MC-CFSTs）with large cross section is proposed and experimentally studied by the use of the electro-mechanical impedance（EMI）measurements of PZT materials.A number of PZT patches are pasted on the upper and lower surface of the horizontal diaphragms and embedded Piezo-based Functional Elements（EPFEs）are embedded in the concrete.The EMI of both the PZT patches on the upper and lower surface of the diaphragm and the EPFEs in concrete core at different frequency regions are measured.The EMI measurements of PZT materials corresponding to the debonding areas show obvious variation.Results show that the proposed EMI based approach is capable of detecting the interface debonding defects for MC-CFSTs.

关 键 词：机电耦合阻抗 大型多腔不规则钢管混凝土柱 压电传感器 界面剥离 嵌入式压电功能元 

分 类 号：TN384[电子电信—物理电子学]