In the following description about the influence of residual stress on the stability bearing capacity of axial compression member, which one is correct? ( )
A. The existence of residual stress results in parts of the cross-section of the member stepping into the plastic state before the global buckling occurring and reduces the stable bearing capacity of the axial compression member.
B. The influences of residual stress on the stability about the strong axis and weak axis are the same.
C. The distribution of residual stress has no effect on the stability of compression member.
D. None is correct.
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What kind of global buckling may occur for the bidirectional flexural solid-web beam-columns? ( )
A. Bending buckling
B. Torsional buckling
C. Lateral-torsional buckling
Distortional buckling
when verify the stability of a built-up compression members about the virtual axis, why the equivalent slenderness ratio λ0x is used? ()
A. The overall stability bearing capacity of built-up member is higher than that of solid-web members having a same size section.
B. Consider the effect of strength
Consider the influence of instability of column limb on the bearing capacity of members
D. Consider the adverse effect of shear deformation
In the following options, which condition can be used to realize a equivalent stability about two principal axes for an axial compression member ().
A. The lengths of the member about the two principal axes are equal
B. The calculated length about the two principal axes are equal
C. The slenderness ratio about the two principal axes are equal
D. The geometric dimension about the two principal axes are equal
If the stability coefficients φ of axial compression columns with a type a, b and c sections are φa、φb、φc, respectively, in the following items, which one is correct? ( )
A. φa≤φb≤φc
B. φb≤φa≤φc
C. φc≤φb≤φa
D. Can't judge
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