Experimental Study of Buckling Strength for Short Square Pipe Column of Carbon Steel Subjected to a Biaxial Bending Load (3rd Report, Upper Eccentric and Lower Coaxial Compressive Loding)

Abstract

This paper is concerned with a biaxial bending compression experiment for the case of eccentric at the upper and axial at the lower ends on carbon steel square pipes in the short column range, supported with spherical seat. An empirical formula for calculating the eccentric bending compressive buckling stress σcre* of the carbon steel square pipes is presented as follows ; σcre*/σcr =1/ (1+ ao), where σcc, is equal to axial compressive buckling stress, ao is equal to factor of the eccentricity and biaxial ratio. The measurement reveals that the results calculated by this formula are in good agreement with those obtained experimentally for the short column range.