基于压电阻抗法的大型钢管混凝土柱界面性能与混凝土质量测试分析  

Interfacial Properties and Concrete Quality Detection and Analysis for Large-Scale Concrete-Filled Steel Tubes with Electro-Mechanical Impedance of PZT

作　　者：杜耀峰 DU Yaofeng(Jianyan Testing Group Co.,Ltd.,Xiamen Fujian 361004,China)

机构地区：[1]健研检测集团有限公司,福建厦门361004

出　　处：《工程质量》2024年第8期63-68,共6页Construction Quality

摘　　要：钢管混凝土柱的核心混凝土终凝后与钢管内壁之间的粘结状态及核心混凝土密实性情况将影响结构构件性能的发挥,其中界面及混凝土的缺陷将对承载能力及延性等性能产生较大的影响。界面及混凝土的缺陷均处于构件内部,属隐蔽性项目,常规超声波法及敲击法适用性不强。论文基于压电应力波测量及机电耦合阻抗测量的检测方法,对构件界面粘结状态和核心混凝土的密实状态进行了检测,得到了界面粘结状态和核心混凝土的密实性的相关数据。试验结果表明,采用压电阻抗法可有效检测大型钢管混凝土柱的界面粘结状态和核心混凝土的密实性,有效地解决了钢管混凝土柱界面粘结状态和核心混凝土的密实性检测的难题,为工程建设提供了有益的参考。The interfacial properties between the core concrete and the inner wall of the steel tube and the compactness of the core concrete after the final set have a significant impact on the performance of large-scale concrete-filled steel tubes.Interface and concrete defects,both hidden within the component,have a major impact on load bearing capacity and ductility.The interface and concrete defects are internal and are not suitable for conventional ultrasonic or knocking methods.This article uses piezoelectric stress wave method and electro-mechanical impedance method to detect the bonding state of the interface and the compactness of the core concrete,obtaining relevant data on the bonding state of the interface and the compactness of the core concrete.The experimental results show that electro-mechanical impedance method can effectively detect the bonding state of large steel-concrete columns and the compactness of the core concrete,effectively solving the difficulty of detecting bonding state and compactness of core concrete in large-scale concrete-filled steel tubes,providing useful references for engineering construction.

关 键 词：压电阻抗法 钢管混凝土柱 界面性能 混凝土质量 无损检测 

分 类 号：TU398.9[建筑科学—结构工程]