Abstract
Failure of large diameter steel cylinders fabricated from hot rolled sheet steel plates and subjected to transverse beam shear occurs when large diagonal buckles develop in the panels formed by the circumferential stiffeners. The load-carrying capacity then drops to a slightly lower level than the ultimate strength level. Whereas the ultimate strength has been shown to be significantly reduced in the presence of fabrication residual stresses, the postbuckling load level is not affected. Further, this load level is stable. It is advocated, therefore, that the postbuckling load be used as a conservative design base for calculation of shear capacity. A general truss model is developed herein as a description of the load-carrying mechanism in the postbuckling range. Predictions obtained using the model are compared with available test results and a design chart is developed that will enable designers to handle most practical cases.
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