建筑结构学报2024，Vol.45Issue(6)：143-152,10.DOI:10.14006/j.jzjgxb.2023.0036
基于嵌入式传感技术的混凝土结构概率损伤成像方法
Probabilistic damage imaging approach of concrete structures based on embedded sensing technology
摘要
Abstract
Early warning and accurate quantification of the concrete structure damage is a hotspot in the field of structural health monitoring(SHM)in civil engineering.In this paper,a probabilistic damage imaging method for concrete structures based on embedded sensing technology was proposed.Through two-dimensional meso-level finite element modeling of the aggregate,mortar matrix and interface transition zone in concrete material,the propagation mechanism of probing stress waves in inhomogeneous concrete material and damage interfaces was revealed.Combined with damage visualization mechanism of transducer array,an embeddable piezoelectric transducer array module was designed.In order to accurately quantify concrete damage,combined with probabilistic damage imaging method,the damage information of propagation time was extracted from the probing signal by baseline subtraction method and Hilbert transform,and the cumulative distribution function was introduced to realize visual reconstruction of concrete damage area.The experimental results show that the embeddable transducer array module could achieve three-dimensional damage imaging of concrete structures,and the error between the identified damage center location and the real damage center location on the two-dimensional projection plane is 1.0 cm,which verifies the effectiveness and accuracy of the method for concrete damage perception.Compared with the existing embeddable sparse distribution transducers,the array-based module with integrated multiple sensing units can significantly improve the detection capability of concrete local damage,and reduce the operation and maintenance cost of the transducer system during the service life.关键词
结构健康监测/混凝土结构/细观有限元模型/压电传感器/嵌入式压电传感阵列模块/概率损伤成像Key words
structural health monitoring/concrete structure/meso-level finite element model/piezoelectric transducer/embeddable piezoelectric transducer array module/probabilistic damage diagnostic imaging分类
建筑与水利引用本文复制引用
张明辉,周德源,何斌,陈洪兵,孔庆钊..基于嵌入式传感技术的混凝土结构概率损伤成像方法[J].建筑结构学报,2024,45(6):143-152,10.基金项目
国家自然科学基金重点国际(地区)合作项目(52020105005),国家自然科学基金面上项目(51978507). （地区）
