Basic experimental studies on the local buckling strength of carbon steel thin-walled square pipes subjected to eccentric compressive load.

Abstract

This paper is concerned with an eccentric compression experiment on carbon steel thin walled square pipes with various a/c rations in the short column range, supported with spherical seats. An empirical formula for calculating the eccentric compressive buckling stress"σce"of the carbon steel thin walled square pipes is presented as follows: σce/σcr=1/{1+2(e/c)}whereσcr=axial compressive buckling stress, e=eccentricity, c=mean distans between walls, a=length. The measurement reveals that the results calculated by this equation are in good agreement with those obtained experimentally for the short column range in the case of 4.1≥a/c≥1.0 and 0.6≥2e/c≥0.