Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Improvement of Flexural Performance of Steel Diaphragm Walls With Interlocking Effects

인터록킹에 의한 강재지하연속벽의 휨성능 개선

  • Lee, Jae Young (Department of Civil Engineering, Kongju National University/Gaurian. Ltd.) ;
  • Hassan, Md Mehidi (Department of Civil Engineering, Kongju National University) ;
  • Jeong, Gawn Woo (Department of Civil Engineering, Kongju National University) ;
  • Han, Shin In (Gaurian. Ltd.) ;
  • Jeong, Hae Chan (Department of Civil Engineering, Kongju National University) ;
  • Kim, Doo Kie (Department of Civil Engineering, Kongju National University)
  • 이재영 (공주대학교 건설환경공학과/(주)가우리안) ;
  • ;
  • 정관우 (공주대학교 건설환경공학과) ;
  • 한신인 ((주)가우리안) ;
  • 정해찬 (공주대학교 건설환경공학과) ;
  • 김두기 (공주대학교 건설환경공학과)
  • Received : 2024.09.09
  • Accepted : 2024.10.10
  • Published : 2024.11.01
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Abstract

According to the recently revised seismic design standards, seismic design of underground structures is required. Concrete underground outer walls are installed separately from temporary earth retaining walls as permanent underground outer walls. This raises issues of constructability, economy, and space narrowness. Therefore, a steel underground continuous wall is developed to promote construction efficiency, safety, and economy by introducing the off-site construction (OSC) method of underground structures. The steel underground continuous wall will be used as a permanent underground continuous wall along with the temporary earth retaining wall. To this end, it must satisfy structural performance equivalent to or higher than the concrete underground outer wall. The integrity and in-plane shear resistance performance between single panel members must be satisfied to be used as a permanent wall. The interlocking effect through geometric bonding is intended to enhance the bonding effect between these members. Therefore, trapezoidal members were developed, and bending performance tests and analyses of each member were performed to confirm the structural bending performance of these members. The bending performance improvement effect of the combined multiple members was confirmed. As a result, it was confirmed that the integration of members and structural performance was improved due to the interlocking effect of the absence of joints. The seismic design analysis of the demonstration site was performed with these developed members, and it was confirmed that the structural performance was equivalent to or higher than that of the existing RC underground continuous wall. As a result, it was confirmed that the steel underground continuous wall can be used as a permanent underground wall together with the temporary earth retaining wall.

Keywords

Acknowledgement

이 연구는 (주)포스코인터내셔널의 '대·중소기업상생협력기금 동반성장투자재원' 사업의 일환으로 지원을 받아 수행되었음.

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