As will be shown in
this study, the stress–strain curve of high-strength steel is significantly
different from that of ordinary steel, which is perhaps the key reason
for some past studies (e.g. [1–4]). Recently, the authors conducted
flexural tests on full-scale I-shaped beams built up from 800 MPa
high-strength steels to study the effect of flange slenderness on flexural
strength and rotation capacity