concentrically loaded' columnsTable1 Properties of 'speclmelland test results SeriesSpeclmenSteeltubeused" Fc'aigleni:)sNe(t)No'(t)No(t)sNeiNotttAgeattest(dass) Nu(t)N./N.rNtUNo t. .ttt.t.I.Iurv I-AI-BI-A][-B"-AM-Brv-Arv-B 2-1'2-3si2･4-1 326218-210.' ee2 l7.329,23g,446.04G.949.352.o63.0 52.8s3.d55,766.4O.33O.55O..64e.69 4849""ee393737 50,75e.852.152.053,953.868.067.9 1.081,081.061.051.041.031.08!.08 O.96O.96O.98O.98O.97O.9Columns subjected t6 axial load and bendlng moment Axialload SeriesSpecimenSteeltubeused' Fc! (kgicm:)sNo(t) Not (t) No(t)N(t) t-tN/ATo'NINoAgeattest(days)M.(t･cm) m I-O,I-1r-2r=3I--5I-6,X-6, 2Ll en5 17.3 390 17.3 390 17.3 390 17,3 39e .17,3374 I7.3 374 17.3 39.6 52.8 52.8'52.852.8 51.3 51:3 44
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Tomii et al. (1979) studied this question.