This paper targets high-strength steel box-section column to beam moment connections with exterior diaphragms whose depth are smaller than those of conventional ones and investigates the yield strength of beam end connections under axial force of columns by the loading test and the finite element analysis. The evaluation method of the yield strength of connections is proposed by considering column axial force. Furthermore, it is revealed that the evaluation method can correspond to results of the test and the analysis within 20%, and the validity of the evaluation method is confirmed.
