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J. Korean Soc. Hazard Mitig. > Volume 19(7); 2019 > Article
시설물방재
Journal of the Korean Society of Hazard Mitigation 2019;19(7):315-321.
DOI: https://doi.org/10.9798/KOSHAM.2019.19.7.315    Published online December 31, 2019.
교량받침 연결부 단일 앵커의 매입 깊이에 따른 전단저항성능 평가
최진석1, 진원종2, 김영진3, 윤영수4
1정회원, 고려대학교 건축사회환경공학부 석사과정
2한국건설기술연구원 인프라안전연구본부 지진안전연구센터 수석연구원
3한국건설기술연구원 인프라안전연구본부 선임연구위원
4정회원, 고려대학교 건축사회환경공학부 교수
Evaluating Shear Resisting Capacity of Single Anchors at Bridge Bearing Connection According to Embedment Depth
Jin-Seok Choi1, Won-Jong Chin2, Young-Jin Kim3, Young-Soo Yoon4
1Member, Master‘s Course, School of Environment and Architectural Engineering, Korea University
2Senior Researcher, Department of Infrastructure Safety Research Seismic Safety Research Center, Korea Institute of Civil Engineering and Building Technology
3Senior Research Fellow, Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology
4Member, Professor, School of Environment and Architectural Engineering, Korea University
Corresponding author:  Young-Soo Yoon, Tel: +82-2-3290-3320, Fax: +82-2-928-7656, 
Email: ysyoon@korea.ac.kr
Received: 17 October 2019   • Revised: 17 October 2019   • Accepted: 6 November 2019
Abstract
In this study, the shear resisting capacity of a single anchor specimen with anchor socket, reinforcement and mortar was evaluated considering the characteristics of the bridge bearing connection and the anchor shear properties due to the horizontal load of an earthquake. In order to confirm the effect of the reinforcing bar (rebar) on anchor performance, the embedment depth variable of anchor socket was set and overall structural behavior of the specimens was verified by changing the height of supporting concrete. The experimental results showed that the shear resistance increased as the embedment depth of the socket increased, and the maximum performance of the anchor was reached when the socket was embedded up to the coping reinforcement according to the construction criteria. By analyzing the strains of the rebar in accordance with the load change, it was confirmed that the required rebar is applied conservatively in the current construction.
Key Words: Bridge Bearing, Anchor, Concrete Breakout, Shear Resistance Capacity
요지
본 연구에서는 교량받침 연결부의 특성과 지진의 수평하중에 의한 앵커전단 특성을 고려하여 앵커소켓의 매입과 보강철근의 배근, 모르타르를 타설한 단일 앵커 실험체의 전단저항성능을 평가하였다. 보강철근의 앵커성능에 대한 영향을 확인하기 위해 앵커소켓의 매입 깊이 변수를 설정하였고 받침콘크리트의 높이를 변화시켜 실험체의 전체적인 구조 거동을 확인하였다. 실험결과, 앵커소켓의 매입 깊이가 커질수록 전단저항성능이 증가하였고 시공 기준에 따라 하부구조의 코핑부 철근까지 매입된 경우 전단하중에 대한 앵커의 최대 성능 발현을 보였다. 하중 변화에 따른 보강철근의 변형률을 분석을 통해 현재 시공에서 적용 철근량이 보수적으로 적용되고 있음이 확인되었다.
핵심용어: 교량받침, 앵커, 콘크리트 파열파괴, 전단저항성능


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