3.2.1. Box-section specimens
Note that the noncompact box section specimen, HS-B1-200-NC, did
not experience any local buckling until the UTM load limit of 1000 t.
However, specimen SM-B1-260-NC experienced a local buckling typical
of box-section stub columns (see Fig. 7). Fig. 8 shows the measured
mean strain versus stress relationship. As reported in Table 4, specimen
HS-B1-200-NC exceeded the required nominal strength for a noncompact
section by 16%, although the test was terminated due to the loading