1. 1) Komatsu, S. and Kitada, T.: Practical Method of Calculation for the Ultimate Strength of Stiffened Plates under Compression, Proc. of JSCE, No. 302, Oct., pp. 1-13, 1980 (in Japanese).
2. 2) Japan Road Association: Specifications for Highway Bridges in Japan (JSHB), February, 1980 (in Japanese).
3. 3) Nakai, H. and Kitada, T.: A Design Method of Wide Stiffened Flange under Compression, Hanshin Expressway Public Corporation and Disaster Science Institution, Oct., 1982 (in Japanese).
4. 4) Dowling, P. J.: Codified Design Methods for Wide Steel Compression Flanges, The Design of Steel Bridges, edited by Rockey and Evans, Paper No. 16, pp. 307-328, 1981.
5. 5) Lamas, A. R. G.: Influence of Shear Lag on Collapse of Wide Flange Girders, Thesis for Ph. D, Imperial College, London, 1977.