Abstract
This paper presents a method of evaluating the flexural strength of a beam web joint connected to a square tube column, considering the out-of-plane deformation of the column flange. The ultimate flexural strength is obtained by applying the yield line theory to a combination of the collapse mechanisms of the column flange and the beam web end. A simple design formula is lead from the obtained solution, and its accuracy required for the practical design is confirmed by the results of both loading tests and numerical analyses. The design formula evaluating the yield strength of the beam end connection is also indicated and its validity is verified.
