FRP加固结构界面损伤的声光纤检测数值模拟及实验

许颖; 刘志安; 邵长军

FRP加固结构界面损伤的声光纤检测数值模拟及实验

1.
哈尔滨工业大学深圳研究生院城市与土木工程防灾减灾深圳市重点实验室, 深圳 518055;
2.
深圳市华阳国际工程设计有限公司, 深圳 518038;
3.
中国建筑东北设计研究院有限公司青岛分公司, 青岛 266071

基金项目: 国家自然科学基金(51278156)

详细信息

通讯作者:
许颖, 博士, 副教授, 博士生导师, 研究方向为复合材料在土木工程中的应用, 结构健康监测和光纤传感器及再生建筑材料. E-mail:cexyx@hotmail.com

中图分类号: TB330.1
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出版历程
- 收稿日期: 2013-10-21
- 修回日期: 2013-11-18
- 刊出日期: 2014-12-14

Numerical simulation and experiment for acoustic-optical fiber based detection of interfacial damage in FRP-retrofitted structures

1.
Shenzhen Key Lab of Urban & Civil Engineering Disaster Prevention & Reduction, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;
2.
Shenzhen Huayang International Engineering Design Co., Ltd., Shenzhen 518038, China;
3.
China Northeast Architecture Design and Research Institute Co., Ltd. Qingdao Branch, Qingdao 266071, China

摘要

摘要: 为了确保纤维复合材料(FRP)加固结构的可靠性和安全性,界面损伤检测是加固质量检查中的一个重要环节.基于薄板自由振动理论,提出一种声-光纤无损检测(NDE)FRP加固结构界面损伤的原理和方法,利用可变频的扬声器产生集中声束作用在FRP加固构件表面形成表面局部振动场,界面损伤引起的局部异常振动区的振动情况可以由粘贴在FRP表面的光纤测得,从而确定损伤的位置和大小.数值模拟分析和实验结果都表明了此方法用于FRP加固结构界面损伤检测的可行性.
- FRP /
- 界面损伤 /
- 光纤干涉仪 /
- 集中声束 /
- 有限单元法
Abstract: To ensure the reliability and safety of fiber reinforced plastic (FRP)-retrofitted structures, the detection of interfacial debonding is an important part of any reinforce quality inspection process. The principle and methodology of an acoustic-optical fiber non-destructive evaluation (NDE) technique based on free vibration theory of a thin plate was proposed for the detection of interfacial damage in FRP-retrofitted structures. A focused sound beam generated from variable frequency loudspeaker source can be controlled to form a locally vibration field of the surface of FRP-retrofitted structures. Local vibration anomalies caused by interfacial damage in the structure can be measured by surface-mounted optical fiber interferometer, and thus, interfacial damage can be detected, mapped, and quantified. Based on the results from both numerical and experimental studies, the feasibility of interfacial damage detection in FRP-retrofitted structures with the proposed technique is demonstrated.
- FRP /
- interfacial damage /
- optical fiber interferometer /
- focused sound beam /
- finite element method