Design of stainless steel sections with circular openings in shear

Lawson, Mark and Basta, Antoine and Uzzaman, Md Asraf (2015) Design of stainless steel sections with circular openings in shear. Journal of Constructional Steel Research, 112. pp. 228-241. ISSN 0143-974X

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    Abstract

    This paper addresses the design of stainless steel sections with large circular openings subject to shear and bending. A total of 9 tests on pairs of C sections using 2 and 3mm thick stainless steel in austenitic 1.4301 and lean duplex 1.4162 grades was performed. The tests showed that the shear resistance at an opening is controlled by local compression at a radial cross-section at approximately 250 to the vertical. For closely spaced openings, the angle of highest stress increases to about 650 to the vertical. The shear resistance of a Class 4 web is also affected by local buckling around the opening, which is a function of its diameter to steel thickness ratio. An equilibrium model is presented which predicts the normal stress on the radial planes around an opening. A simplified formula for the local buckling strength around circular web openings is also presented, which agrees well with the test results.