Multi-physical field guided wave simulation for circular concrete-filled steel tubes coupled with piezoelectric patches considering debonding defects

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:122

Article

Xu, Bin^1,2  Chen, Hongbing³  Mo, Y. -L.⁴  Chen, Xuemin⁵ 

[1] Huaqiao Univ, Coll Civil Engn, 668 Jimei Ave, Xiamen 361021, Fujian, Peoples R China

[2] Huaqiao Univ, Key Lab Struct Engn & Disaster Prevent Fujian Pro, 668 Jimei Ave, Xiamen 361021, Fujian, Peoples R China

[3] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China

[4] Univ Houston, Dept Civil & Environm Engn, Houston, TX 77204 USA

[5] Texas Southern Univ, Dept Engn, Houston, TX 77004 USA

关键词: Multi-physical field coupling model;    Piezoelectric ceramics;    Circular Concrete-Filled Steel Tube (CCFST);    Interfacial debonding;    Guided wave propagation;    Numerical analysis;    Wavelet packet analysis;   

DOI  :  10.1016/j.ijsolstr.2017.05.040

来源: Elsevier

【 摘 要 】

The active interface debonding detection for concrete-filled steel tubes (CFSTs) using Piezoelectric Lead Zirconate Titanate (PZT) patches has been proposed and experimentally studied in recent years. In order to further investigate the guided wave propagation and the response of embedded PZT sensor, transient dynamic analysis on multi-physical field coupling models composed of surface-mounted PZT actuator, embedded PZT sensor and a circular CFST specimen considering the coupling effect between the PZT patches and CFST member and the influence of interface debonding defects is carried out numerically. The guided wave propagation within the CFST-PZT coupling system without and with interfacial debonding defects under single period impulse signal is simulated and compared. The voltage response time history of the embedded Pit sensor in coupling models under both sinusoidal and sweep frequency sinusoidal excitations are simulated as an alternative solver. Numerical results demonstrate that interface debonding leads to changes in guided wave propagation path, traveling time and the Pit sensor response. The sensitivity of a quantitative evaluation index called as the normalized wavelet packet energy of the output voltage of embedded PZT sensor to the initiation of interface debonding defect and its length and depth is illustrated. (C) 2017 Elsevier Ltd. All rights reserved.

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