Analytical and experimental study of thin circular steel tubes under bending

الملخص EN

Available studies that compare experimental with analytical bending capacity of thin-walled
circular tubes are few.

A wide difference is noticed between experimental and analytical
results especially for thin-walled tubes.

Trying to fill this gap, experimental and analytical
bending capacities of circular tubes are reviewed.

A parametric study is conducted to predict
the allowable bending stresses and slenderness ratios that separate between section types:
compact, non-compact and slender.

Four full-scale tubes are tested up to failure under
bending: two cantilever beams with one concentrated load at the free end; and two simple
beams with concentrated loads at the one-third points.

Verification of the 3D non-linear finiteelement
analysis against the experimental results is conducted to ensure analysis accuracy.

In
addition, comparison between the procedures used for bending capacity calculations in
different codes and research studies is performed.

Distribution of stresses and overall versus
local buckling modes are investigated.

Parameters studied include: Diameter to thickness
(D/t) ratio, Length to Diameter (L/D) ratio, load conditions, support conditions and stressstrain
curves.