A study on flexural buckling strength F cr of inelastic buckling for compressive members

Since Euler’s classical theory, which he proposed in 1759, many column curve formulations have been proposed. This studyinvestigates the flexural buckling strength (Fcr) calculated using the allowable stress design specification and the load andresistance factor design (LRFD) specification of the American Institute of Steel Construction. It is noted that the exponentialfunction of the column curve formulation using LRFD is difficult to use in practice. Therefore, a simple parabolic function isproposed for the inelastic buckling strength of a steel column loaded with uniaxial compression, and it is shown to be consistentwith many design codes. The expressions for inelastic buckling strength formulation as defined previously for ASD are usedhere. To verify the proposed equation, 118 individual test results of steel columns are examined. The mean of the ratio of thecolumn strength to the proposed flexural buckling strength is 1.089, indicating that the proposed strength curves are in goodagreement with the test results. KCI Citation Count: 1