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Effect of reinforcing details on seismic behavior of RC exterior wide beam-column joint

  • Jae Hyun Kim (Department of Architectural Engineering, University of Seoul) ;
  • Seung-Ho Choi (Department of Fire and Disaster Prevention Engineering, University of Seoul) ;
  • Sun-Jin Han (Department of Architectural Engineering, University of Seoul) ;
  • Hoseong Jeong (Department of Architectural Engineering and the Smart City Interdisciplinary Major Program, University of Seoul) ;
  • Jae-Yeon Lee (Department of Architecture, Mokwon University) ;
  • Kang Su Kim (Department of Architectural Engineering and the Smart City Interdisciplinary Major Program, University of Seoul)
  • Received : 2023.08.07
  • Accepted : 2023.09.25
  • Published : 2023.10.25
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Abstract

This paper presents experimental and numerical studies of seismic performance on reinforced concrete (RC) wide beam (WB) joints. Two RC-WB joint specimens and one conventional RC joint specimen were fabricated using the reinforcing details of longitudinal reinforcing bars in a beam as a variable, and quasi-static cyclic loading tests were performed. The results were used to compare and analyze the load-drift ratio relationship, failure mode, and seismic performance of the specimens quantitatively. In addition, a finite element (FE) analysis of the RC-WB joint was conducted, and the rationality of the FE model was validated by comparing it with the test results. Based on the FE model, a parametric study was conducted, where the ratio of longitudinal reinforcing bars placed on the outer and inner parts of the joint (𝜌ex/𝜌in) was a key variable. The results showed that, in the RC-WB joint, an increase of 𝜌ex/𝜌in leads to more severe damage to concrete, which reduces the seismic performance of the RC-WB joints.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2021R1I1A3049928).

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