薄肉閉断面部材の捩り挙動 : その 2・圧縮・曲げ・捩り

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This report describes the experimentally obtained torsional behaviour of steel tubes under bending and constant compression. Testing machine is the one explained in "Part 1" only with the additional bending applicator. The bending capacity is 10 t-m and the rotation capacity is ±15°, limited by oil spherical fixture. End condition is that one end of a specimen is pin supported for bending and loaded with torsion, and the other is loaded with bending. Therefore the additional moment due to axial force is small. Test results are as follows. (1) Ultimate load carrying capacity could also be decided according to the interaction curve of compression and bending moment, modifying the yield normal stress taking shear flow under torsion into account. (2) The maximum load was maintained until local buckling occured, hence specimens showed elastic-plastic torsional behaviour. (3) Deformation capacity (√<(υ/υ_p)^2+(β/β_p)^2>) decresed when bending moment was superior to torsion. Finally, torsional and bending behaviour of closed sections is compared with that of wide-flange sections.
社団法人日本建築学会の論文
1976-09-30