URL：https://www.researchgate.net/publication/47393591/figure/fig10/AS:306073459281921@1449985007045/presents-interaction-curves-for-I-beam-and-ratio-between-web-area-and-flange-area-1-2-and.png
掲載元：https://www.researchgate.net/figure/presents-interaction-curves-for-I-beam-and-ratio-between-web-area-and-flange-area-1-2-and_fig10_47393591
