Local and distortional buckling of stainless steel sections

Summary

The project aims to provide an understanding of how the unique material properties of stainless steel affect the local and distortional buckling behaviour.

Supervisor(s)

Professor Kim Rasmussen

Research Location

Civil Engineering

Program Type

N/A

Synopsis

Stainless steel structural shapes are becoming increasingly complex as cold-forming techniques are advancing. The evolving new profiles have several rolled-in stiffeners which enhance the strength and cause buckling in local and distortional modes. Experimental tests and analytical research are being used to obtain solutions for the buckling strength of stainless steel sections failing in the local and distortional modes. New design guidelines are being prepared for these modes to ensure the safe and efficient design of evolving new cross-sectional shapes. Particular attention is paid to the effect of gradual yielding on the buckling stress of stainless steel sections. It has been demonstrated that the pronounced capacity to strain-harden significantly enhances the strength of the corner regions of cold-formed sections. This increase in strength to a large extent annuls the reduction in strength caused by the loss of stiffness associated with gradual yielding.The following types of tests have been conducted:
* Duplex grade plates in uniform compression
* Compression tests of lipped channel sections and lipped channel sections with intermediate stiffeners
* Pure bending tests of stainless steel roofing sections

Accurate finite element advanced analyses have been developed accounting for anisotropy and kinematic hardening. Conventional effective width based design models and novel models based on the Direct Strength Method have been formulated and checked against experimental and numerical tests.

The project is supported by the University of Sydney Research & Development scheme, the Australian Stainless Steel Development Association and Stramit Industries.

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Keywords

structural engineering, stainless steel, buckling

Opportunity ID

The opportunity ID for this research opportunity is: 408

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