oa Civil Engineering = Siviele Ingenieurswese - Local buckling of webs and flanges in plastic design to SABS 0162:1984



Local buckling of the flanges and webs of I-sections are two of the most significant factors causing strain-weakening behaviour of plastically-designed steel structures. In the new South African code for steel design, SABS 0162:1984, the provisions for web buckling in particular appear to be over-conservative. The background theory to these requirements Is discussed and a new theoretical model proposed. The requirements of the code and the theoretical predictions are compared to the results of a series of tests in which the negative Influence of coincident axial force is apparent.


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