Abstract
Cylindrical columns without diaphragms at moment connections to H-section beams are usually thickened to prevent excessive deformation as well as premature failure due to local out-of-plane bending. Two types of formulae for such connections were proposed in the past. One was introduced by Kamba et al. through regression analysis applied to FEA data for yield and ultimate strengths, and the other by the authors based on mechanical models for yield, plastic, and ultimate strengths together with elastic rotational stiffness. The predictabilities of these formulae are examined by comparing their estimations with experimental data and FEA numerical solutions, which reveals that strength formulae by Kamba as well as by the authors have almost the same level of good accuracy, and the stiffness formula by the authors is also satisfactory for practice.
