Evaluation of internal void related defects in reinforced concrete slab using electromagnetic wave properties  

作　　者：Minju Kang Jinyoung Hong Taemin Lee Doyun Kim Hajin Choi 

机构地区：[1]School of Architecture,Soongsil University,Seoul 06978,Republic of Korea

出　　处：《Earthquake Engineering and Engineering Vibration》2024年第3期525-535,共11页地震工程与工程振动（英文刊）

基　　金：National Research Foundation of Korea(NRF)Funded by the Korean Government(MSIT)under Grant Nos.RS-2023-00210317 and 2021R1A4A3030117;the Digital-Based Building Construction and Safety Supervision Technology Research Program Funded by the Ministry of Land,Infrastructure,and Transport of the Korean Government under Grant No.RS-2022-00143493;the Korea Institute of Civil Engineering and Building Technology(KICT)of the Republic of Korea,Project under Grant No.2023-0097。

摘　　要：This study aims to develop a damage-detection algorithm based on the electromagnetic wave properties inside a reinforced concrete structure.The proposed method involves employing two algorithms based on data measured using ground-penetrating radar—a common electromagnetic wave method in civil engineering.The possible defect area was identified based on the energy dissipated by the damage in the frequency-wavenumber domain,with the damage localized using the calculated relative permittivity of the measurements.The proposed method was verified through a finite difference time-domain-based numerical analysis and a testing slab with artificial damage.As a result of verification,the proposed method quickly identified the presence of damage inside the concrete,especially for honeycomb-like defects located at the top of the rebar.This study has practical significance in scanning structures over a large area more quickly than other non-destructive testing methods,such as ultrasonic methods.

关 键 词：GPR concrete defect electromagnetic wave relative permittivity non-destructive testing(NDT) 

分 类 号：TU755.7[建筑科学—建筑技术科学]