Structural Engineering and Mechanics

  • 제83권6호
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  • Pages.799-810
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  • 2022
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR Code

Out-of-plane behavior of perforated masonry walls strengthened with steel-bar truss system

  • Hwang, Seung-Hyeon (Department of Architectural Engineering, Graduate School, Kyonggi University) ;
  • Mun, Ju-Hyun (Department of Architectural Engineering, Kyonggi University) ;
  • Yang, Keun-Hyeok (Department of Architectural Engineering, Kyonggi University) ;
  • Kim, Sanghee (Department of Architectural Engineering, Kyonggi University)
  • 투고 : 2021.08.30
  • 심사 : 2022.08.10
  • 발행 : 2022.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study investigated the effect of the strengthening efficiency of unbonded steel-bar truss system on the out-of-plane behavior of perforated masonry walls. Four full-scale unreinforced masonry (URM) walls with two different planes were prepared using the unbonded steel-bar truss system and a URM walls without strengthening. All masonry walls were tested under constant axial and cyclic lateral loads. The obtained test results indicated that the pinching effect in the out-plane behavior of masonry walls tends to decrease in the in- and out-of-plane strengthened URM walls using the unbonded steel-bar truss system with the higher prestressing force ratio (Rp) of vertical reinforcing bars in the unbonded steel-bar truss system, regardless of the perforated type of the masonry wall. Consequently, the highest maximum shear resistance and cumulative dissipated energy at peak load in the post-peak behavior were observed in the in- and out-plane strengthened URM walls with the highest Rp values, which are 2.7 and 6.0 times higher than those of URM. In particular, the strengthening efficiency of the unbonded steel-bar truss system was primarily attributed to the vertical prestressed steel-bars rather than the diagonal steel-bars, which indicates that the strains in the vertical prestressed steel-bars at the peak load were approximately 1.6 times higher than those in the diagonal steel-bars.

키워드

과제정보

This research was supported by National Disaster Management Research Institute funded by Ministry of the Interior and Safety (2021-MOIS32-042-01010100-2022).

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