Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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Evaluation of Flexural Performance of Reinforced Concrete Shear Walls According to Flexural Retrofit by Wall End Excavating

단부 파쇄형 휨 보강에 따른 철근콘크리트 전단벽 휨 성능 평가

  • 조의진 (한양대학교 대학원) ;
  • 김수용 (한양대학교 대학원) ;
  • 배백일 (한양사이버대학교 디지털건축도시공학과) ;
  • 최창식 (한양대학교 건축공학부)
  • Received : 2020.02.04
  • Accepted : 2020.03.30
  • Published : 2020.04.30
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Abstract

The purpose of this study is to analyze the method of retrofitting flexural strength and the flexural performance of retrofitted shear walls. There are various ways to reinforce the flexural strength of reinforced concrete shear wall structural systems that have already been built, in the case of that, the external force is increased, and the internal force is insufficient. However, there are various problems, such as excessive flexural stiffness after reinforcement and increasing the thickness and length of the wall. We have developed a retrofit method to solve these problems. The wall end is excavated to place the required vertical rebars, and concrete is poured after placing rebars. This is the same concept as creating wall end boundary elements later on. We also studied the anchorage method of reinforcement and the interaction method between the retrofitting end and the existing wall. The flexural test results for the reinforced concrete shear wall using the studied retrofit method can be predicted according to the sectional analysis and FEM analysis, and there are differences in the plastic hinge length, crack propagation, stiffness degradation and energy dissipation due to the bending depending on the vertical rebar ratio of wall end.

Keywords

Acknowledgement

Supported by : 국토교통부

이 논문은 국토교통부 R&D 주거환경연구사업의 연구비지원(20RERP-B099826-06)에 의해 수행되었습니다.

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