Local Strand-Breakage Detection in Multi-Strand Anchorage System Using an Impedance-Based Stress Monitoring MethodFeasibility Study

被引：30

作者：

Dang, Ngoc-Loi ^{[1
]}

Huynh, Thanh-Canh ^{[1
]}

Kim, Jeong-Tae ^{[1
]}

机构：

[1] Pukyong Natl Univ, Dept Ocean Engn, Busan 48723, South Korea

来源：

SENSORS | 2019年 / 19卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

strand breakage detection; multi-strands system; impedance-based method; impedance signature; PZT interface; IDENTIFICATION; COLLAPSE; BRIDGE;

D O I：

10.3390/s19051054

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This study investigates the feasibility of impedance-based stress monitoring method for local-strand breakage detection in multi-strand anchorage systems. Firstly, stress fields of a multi-strand anchorage system are numerically analyzed to examine anchorage's responses sensitive to local strand breakage. Secondly, an impedance-based stress monitoring technique via the PZT interface is outlined. Thirdly, a novel hoop-type PZT interface is designed for the multi-strands anchorage to monitor the stress variation induced by the strand breakage. Local dynamic responses of the hoop-type PZT interface are analyzed to predetermine the effective frequency ranges. Finally, the numerical feasibility of the proposed method is verified on a seven-strand anchorage system under various strand breakage cases. Variations in impedance responses are statistically quantified, and broken strands are localized by linear tomography analysis of damage indices. A lab-scale experiment is also conducted on a multi-strands anchorage to evaluate the realistic performance of the hoop PZT interface for impedance-based stress monitoring method.

引用

页数：22

共 26 条

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