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

Jae Hyun Kim, Seung Ho Choi, Sun Jin Han, Hoseong Jeong, Jae Yeon Lee, Kang Su Kim

Research output: Contribution to journalArticlepeer-review

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 ρexin leads to more severe damage to concrete, which reduces the seismic performance of the RC-WB joints.

Original languageEnglish
Pages (from-to)283-296
Number of pages14
JournalEarthquake and Structures
Volume25
Issue number4
DOIs
StatePublished - 2023

Keywords

  • exterior joint
  • quasi-static cyclic loading test
  • reinforced concrete
  • seismic performance
  • wide beam

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