基于表面压电波动测量的钢管砼剥离检测试验  

Experiment on Interface Debonding Detection for Concrete-Filled Steel Tubular Structure Using Surface Wave Measurement

作　　者：杨映泉 许斌[2,3] 栾乐乐 陈洪兵[1] 王海东[1] YANG Yingquan;XU Bin;LUAN Lele;CHEN Hongbin;WANG Haidong(College of Civil Engineering,Hunan University,Changsha 410082,China;College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province,Huaqiao University,Xiamen 361021,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]华侨大学土木工程学院,福建厦门361021 [3]华侨大学福建省结构工程与防灾重点实验室,福建厦门361021

出　　处：《压电与声光》2018年第3期437-441,共5页Piezoelectrics & Acoustooptics

基　　金：国际科技合作与交流专项基金资助项目(2014DFE70230);湖南省科技计划重点项目(2014TT1006)

摘　　要：钢管混凝土结构结合了钢管与混凝土两者的力学优点,具有优越的力学性能,被广泛应用于超高层建筑和大跨度桥梁中,但钢管管壁与内部核心混凝土间的界面剥离将会对其承载力等力学性能带来负面影响。该文提出一种通过在钢管壁同侧布置压电陶瓷片作为驱动器和传感器,基于表面波动测量的矩形截面钢管混凝土构件的界面剥离缺陷检测方法,通过在一矩形截面钢管混凝土柱钢管的四面内壁设置不同程度剥离缺陷进行测试,对比简谐激励下健康工况和不同尺寸缺陷工况下压电传感器测量信号幅值,定义界面损伤指标实现了管壁界面剥离缺陷检测。结果表明,基于表面波动测量的钢管混凝土柱内部界面剥离缺陷状况检测方法有效,损伤指标与损伤程度相关。The concrete-filled steel tubular （CFSTs） structure combines the mechanical advantages of both steel tubular and concrete and has widely used in super high-rise buildings and large span bridges due to its excellent mechanical properties. However, the debonding between the steel tubular and the confined concrete core leads to negative effects on the mechanical properties including load-carrying capacity. In this paper, an interface debonding detection approach for a rectangular CFST specimen using surface stress wave measurement excited by a surface-mounted piezoelectric ceramic （PZT） patch on the same side of tubular is proposed. A rectangular CFST specimen with different interface debonding defects on the four inner surfaces is tested and the measurement of the surface-mounted PZT patch under sinusoidal excitation signals is analyzed. The comparison between the signal amplitude of piezoelectric sensor measurement under harmonic excitation in healthy condition and defect condition with different size was carried out. The interface damage index is defined to achieve the detection of pipe wall interface peeling defects. The results show that the proposed approach can effectively identify the debonding defect of the CFSTs and the defined index is dependent on the severity of the debonding.

关 键 词：压电陶瓷 同侧布置 表面粘贴 表面波 波动测量 界面损伤指标 

分 类 号：TN384[电子电信—物理电子学]