FBG 传感器在带孔道面板载荷试验中的应用

中国民航大学学报

FBG 传感器在带孔道面板载荷试验中的应用

蔡靖，都志强，李岳

（中国民航大学机场学院，天津300300）

收稿日期:2016-03-08 修回日期:2016-04-08 出版日期:2016-12-26 发布日期:2016-12-28
作者简介:蔡靖（1975—），女，河北滦县人，副教授，博士，研究方向为机场道面结构性能及其监测技术.
基金资助:
天津市科技支撑重点项目（14ZCZDGX00001）；中国民航大学机场工程科研基地项目（14JCGCKYJD）

Application of FBG sensor in load tests on concrete pavement structure with holes

CAI Jing, DU Zhiqiang, LI Yue

（College of Airport Engineering, CAUC, Tianjin 300300, China）

Received:2016-03-08 Revised:2016-04-08 Online:2016-12-26 Published:2016-12-28

摘要/Abstract

摘要：

由于助航灯光的设置，机场跑道道面板内设有连续分布的孔，使其处于带孔工作状态。因此，设计了带孔混凝土道面板载荷试验，分别在道面板板侧和孔洞内布置电阻应变片和光纤光栅传感器，从而获得板侧弯拉应变和孔内竖向剪切应变；进而通过道面板有限元模拟分析，对孔内竖向剪切应变与板边弯拉应变的关系进行拟合，获得二者之间的相互关系，并与试验结果进行对比。结果表明：试验结果和有限元分析结果吻合，误差在20%以内，满足工程要求。进一步进行了动载试验并对动应变信号进行小波包分析，获得带裂缝板的能量分布规律，且发现裂缝处孔内剪切应变能量变化率达到84.8%，说明剪切应变对损伤具有敏感性，所提监测方法可实现损伤的识别和预警。

关键词: 道路工程, 光纤光栅传感器, 载荷试验, 带孔道面板, 小波包分析

Abstract:

Pavement slabs work in condition with holes because of the continuous distribution of holes in them arranged for navigation lights. Therefore, concrete pavement slab load test with holes is designed to obtain the side flexuraltensile strain of slab and bore vertical shear strain by arranging strain gauges and FBG sensors in the side of slab and holes respectively. Finite element method is used to analyze the pavement slab and to compare with the experiment results by fitting the curves of side flexural-tensile strain of slab and bore vertical shear strain, showing that the experimental results are in good agreement with the results of finite element analysis, and the error is within 20%, which can meet the engineering requirements. Furtherly, dynamic load test and dynamic strain signal wavelet packet analysis are conducted to obtain energy distribution board with cracks, finding that the hole cut strain energy rate in cracks can reach 84.8%, suggesting that the shear strain is sensitive to injury, so the proposed monitoring method can be implemented to identify and alert the damages.

Key words: road engineering, FBG sensor, load test, pavement structure with holes, wavelet packet analysis

中图分类号:

蔡靖，都志强，李岳. FBG 传感器在带孔道面板载荷试验中的应用[J]. 中国民航大学学报.

CAI Jing, DU Zhiqiang, LI Yue. Application of FBG sensor in load tests on concrete pavement structure with holes[J]. .

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