An Experimental Study on the Repair Evaluation of Deteriorated RC Beams Using Natural Frequency and Mechanical Behavior Related to Damage Condition

Yilong Cao, Akihiko Nishimura, Xiu Luo, Masao Okoshi, Wendong Tang, Hidekazu Nishimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study aims to quantitatively evaluate the repair of deteriorated RC beams for reuse through natural frequency and proposes a method that describes the mechanical behavior of structures. A static loading test was conducted to determine the load-carrying capacity and deformation performance of structures. To investigate the soundness of the RC beam based on the change of the natural frequency at each load stage, an impact vibration test (IVT) was conducted. Then, a higher vibration mode of natural frequencies, which can better reflect the degree of damage of a frame, was used as an evaluation index to represent the mechanical behavior of structures. The result confirmed that, although in case where IVT is challenging to perform due to location limitations, the damage condition can be estimated from the axial stiffness (EA) of RC beams by axial impact to measure the natural frequencies. Regarding the defined model of mechanical behavior, the results in each deteriorated pattern or load stage to be organized by level of damage. Accordingly, the reliability of the quantitative evaluation of repair effectiveness using the proposed method was verified.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Civil Engineering and Architecture Conference - CEAC 2023
EditorsMarco Casini
PublisherSpringer Science and Business Media Deutschland GmbH
Pages205-221
Number of pages17
ISBN (Print)9789819963676
DOIs
Publication statusPublished - 2024
Event3rd International Civil Engineering and Architecture Conference, CEAC 2023 - Kyoto, Japan
Duration: 2023 Mar 172023 Mar 20

Publication series

NameLecture Notes in Civil Engineering
Volume389
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference3rd International Civil Engineering and Architecture Conference, CEAC 2023
Country/TerritoryJapan
CityKyoto
Period23/3/1723/3/20

Keywords

  • Impact vibration test
  • Mechanical behavior
  • Quantitative assessment
  • RC Beam
  • Repair

ASJC Scopus subject areas

  • Civil and Structural Engineering

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