Crack detection for wading-concrete structures using water irrigation and electric heating
作者机构：Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu 610065China MOE Key Laboratory of Deep Earth Science and EngineeringSichuan UniversityChengdu 610065China College of Architecture and EnvironmentSichuan UniversityChengdu 610065China College of Biomass Science and EngineeringSichuan UniversityChengdu 610065China
出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)
年 卷 期：2023年第17卷第3期
页 面：368-377页
核心收录：
学科分类：08[工学] 0837[工学-安全科学与工程] 0901[农学-作物学] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 080102[工学-固体力学]
基 金：This work was supported by the Natural Science Foundation of Sichuan Province(No.2022NSFSC0422) China and the Fundamental Research Funds for the Central Universities,China
主 题：structural health monitoring underwater concrete structure fiber Bragg grating crack detection temperature tracer method
摘 要：Cracking in wading-concrete structures has a worse impact on structural safety compared with conventional concrete *** accurate and timely monitoring of crack development plays a significant role in the safety of wading-concrete *** heat-transfer rate near a crack is related to the flow velocity of the fluid in the *** on this,a novel crack-identification method for underwater concrete structures is *** method uses water irrigation to generate seepage at the interface of a crack;then,the heat-dissipation rate in the crack area will increase because of the convective heat-transfer effect near the *** information can be identified by monitoring the cooling law and leakage flow near *** proposed mobile crack-monitoring system consists of a heating system,temperature-measurement system,and irrigation system.A series of tests was conducted on a reinforcedconcrete beam using this *** crack-discrimination indexψwas defined,according to the subsection characteristics of the heat-source cooling *** effects of the crack width,leakage flow,and relative positions of the heat source and crack onψwere *** results showed that the distribution characteristics ofψalong the monitoring line could accurately locate the crack,but not quantify the crack ***,the leakage flow is sensitive to the crack width and can be used to identify it.
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