Tri-directional loading tests were conducted with out-of-plane deformation and axial force conditions as parameters. The in-plane maximum load capacity was reduced by 8.8% due to out-of-plane deformation and varying axial load. The results were discussed along with previous experiments by the authors. As a result, it was found that the out-of-plane deformation reduced the maximum load capacity by 19% compared to that under uni-directional loading, while the axial force variation reduced that by 2% compared to that under constant axial load. An evaluation method considering tri-directional loading proposed by the authors could accurately evaluate the in-plane shear capacity.
