Abstract
This study describes fracture strength of electro-slag welded (ESW) connections in beam-to-welded box column connection. The discussions are based on subassemblage connection test results of ESW joints and finite element analysis (FEA) results of corresponding analytical models. Case studies are also carried out making the gap between an interior diaphragm and a beam flange main analytical parametes. Results are summarized as follows; 1) The subassemblage connection test results show roughly positive correlation between the fracture toughness and the fracture strengths of ESW joints. 2) The subassemblage connection test results and the corresponding FEA results correlate the fracture toughness with calculated equivalent maximum principal stress. 3) The fracture behavior of ESW joints shows good correlation between subassemblage connection test and cruciform model test.
