Seismic Performance Evaluation of Steel Box-Column Connections with ESW Stiffeners

Chui Hsin Chen, Ker Chun Lin, Sheng Jhih Jhuang, Heui Yung Chang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The purpose of this study is to evaluate the seismic performance of steel box-column connections with electro-slag welding (ESW) stiffeners. Steel box columns have been widely adopted in seismically active areas, such as Japan and Taiwan. It is a common practice to weld diaphragm plates to the inner walls of steel box columns using the ESW process. However, there is still a lack of study evaluating the seismic performance of these steel box-column connections. In the first part of this paper, a literature review examines ESW stiffeners and their impacts on steel box-column connections. In the second part, finite element analysis is conducted on ESW misalignment and eccentricity. The result shows a correlation between connection failures and ESW stiffeners. In addition, ESW fusion diameters can affect the connections more significantly than ESW eccentricities and the thickness of diaphragm plates.

Original languageEnglish
Number of pages11
JournalInternational Journal of Steel Structures
StateE-pub ahead of print - Feb 2020


  • Box-column
  • ESW welding
  • FEA
  • Literature review
  • Steel connection


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