[ Article ]

Journal of Korean Society of Steel Construction - Vol. 36, No. 6, pp.357-364

ISSN: 1226-363X (Print) 2287-4054 (Online)

Print publication date 27 Dec 2024

Received 08 Nov 2024 Revised 28 Nov 2024 Accepted 28 Nov 2024

DOI: https://doi.org/10.7781/kjoss.2024.36.6.357

무필름 물전사지를 활용한 강재댐퍼의 DIC패턴 적용 및 변형 분석

백승현¹ ; 김동건²^{, *}

1석사과정, 동아대학교, ICT융합해양스마트시티공학과
2정교수, 동아대학교, ICT융합해양스마트시티공학과

Application of DIC Pattern and Deformation Analysis of Steel Dampers Using Film-Free Water Decal Method

Baek, Seung Hyeon¹ ; Kim, Dong Keon²^{, *}

1M.Sc.Student, Dept. of ICT Integrated Safe Ocean Smart City Engineering, Dong-A University, Busan, 49315, Korea
2Professor, Dept. of ICT Integrated Safe Ocean Smart City Engineering, Dong-A University, Busan, 49315, Korea

Correspondence to: ^*Tel. +82-51-200-7692 Fax. +82-51-200-7616 E-mail. dkkzone@dau.ac.kr

초록

본 연구는 디지털 이미지 상관기법(DIC)을 활용하여 강재댐퍼의 비선형 이력 거동을 분석하고, 무필름 물전사지(Film-Free Water Decal) 패턴을 적용한 변형률 측정의 효용성을 평가하고자 하였다. DIC를 통해 측정한 변위와 변형률은 만능시험기(UTM), LVDT, 스트레인 게이지의 결과와 비교되었으며, 실험체 표면의 스프레이 패턴 및 무필름 물전사지 패턴에 따른 차이를 분석하였다. 실험 결과, DIC를 이용한 변형 측정은 5.91 % 이하의 오차율로 UTM 결과를 정확히 모사할 수 있었고, 스트레인 게이지와 유사한 변형률 분포를 나타내었다. 특히, 무필름 물전사지 패턴은 높은 대조도와 내구성으로 세부 변형 분석에서 유리한 결과를 제공하였다.

Abstract

This study aimed to analyze the nonlinear hysteretic behavior of steel dampers using the Digital Image Correlation (DIC) technique and to evaluate the effectiveness of deformation measurements employing a Film-Free Water Decal pattern. The displacements and strains obtained via DIC were compared with results from a universal testing machine (UTM), LVDT, and strain gauges. The differences between spray-patterned and film-free decal-patterned specimens were also investigated. The experimental results demonstrated that DIC-based deformation measurements accurately reproduced UTM outcomes with an error margin below 5.91 %, showing similar strain distributions to those from strain gauges. Particularly, the film-free decal pattern provided high contrast and durability, making it advantageous for detailed deformation analysis.

Keywords:

Digital image correlation, Film-free water decal method, Steel damper, Cyclic load, Hysteresis curve, Strain

키워드:

디지털 이미지 상관기법, 무필름 물전사지, 강재댐퍼, 반복하중, 하중-변위 이력곡선, 변형률

Acknowledgments

이 연구는 2016년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(2016R1A6A1A03012812)

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