STRENGTH OF SHS COLUMN TO BEAM CONNECTIONS WITH HOLES FOR HOT DIP GALVANIZING IN THROUGH DIAPHRAGMS

When hot-dip galvanizing a square hollow section column, it is necessary to provide holes in the diaphragms. These holes affect the local rigidity and local strength of the beam to column connections. It requires local strength evaluation formulae to properly design the hole diameter and the plate thickness of the diaphragms. In this paper, the behavior of the connections and the failure mode is examined by loading tests. The shortage of test parameters is supplemented by performing finite element numerical analysis. Evaluation formulas for local yield strength and local ultimate strength are proposed based on limit analysis.