http://spiral.imperial.ac.uk/bitstream/10044/1/42668/2/Arrayago%20et%20al%20%282015%29%20-%20Description%20of%20stress-strain%20curves%20for%20stainless%20steel%20alloys.pdf

Description of stress-strain curves for stainless steel alloys

Stress-strain curves for hot-rolled steels

Current stainless steel design standards are based on elastic, perfectly plastic material behaviour providing consistency with carbon steel design expressions, but often leading to overly conservative results, particularly in the case of stocky elements. More economic design rules in accordance with the actual material response of stainless steel, which shows a rounded stress–strain curve with significant strain hardening, are required. Hence, the continuous strength method (CSM) was developed. The CSM replaces the concept of cross-section classification with a cross-section deformation capacity and replaces the assumed elastic, perfectly plastic material model with one that allows for strain hardening. This paper summarises the evolution of the method and describes its recent simplified form, which is now suitable for code inclusion. Comparison of the predicted capacities with over 140 collected test results shows that the CSM offers improved accuracy and reduced scatter relative to the current design methods. The reliability of the approach has been demonstrated by statistical analyses and the CSM is currently under consideration for inclusion in European and North American design standards for stainless steel structures.

/pdf/the-continuous-strength-method-for-structural-stainless-48mq68067p.pdf

The continuous strength method for structural stainless steel design

https://hub.hku.hk/bitstream/10722/200516/1/Content.pdf

The art of coupon tests

Abstract This paper presents theoretical descriptions of the key phenomena that govern the behaviour of composite framed structures in fire. These descriptions have been developed in parallel with large scale computational work undertaken as a part of a research project (The DETR-PIT Project, Behaviour of steel framed structures under fire conditions) to model the full-scale fire tests on a composite steel framed structure at Cardington (UK). Behaviour of composite structures in fire has long been understood to be dominated by the effects of strength loss caused by thermal degradation, and that large deflections and runaway resulting from the action of imposed loading on a ‘weakened’ structure. Thus ‘strength’ and ‘loads’ are quite generally believed to be the key factors determining structural response (fundamentally no different from ambient behaviour). The new understanding produced from the aforementioned project is that, composite framed structures of the type tested at Cardington possess enormous reserves of strength through adopting large displacement configurations. Furthermore, it is the thermally induced forces and displacements, and not material degradation that govern the structural response in fire. Degradation (such as steel yielding and buckling) can even be helpful in developing the large displacement load carrying modes safely. This, of course, is only true until just before failure when material degradation and loads begin to dominate the behaviour once again. However, because no clear failures of composite structures such as the Cardington frame have been seen, it is not clear how far these structures are from failure in a given fire. This paper attempts to lay down some of the most important and fundamental principles that govern the behaviour of composite frame structures in fire in a simple and comprehensible manner. This is based upon the analysis of the response of single structural elements under a combination of thermal actions and end restraints representing the surrounding structure.

Fundamental principles of structural behaviour under thermal effects (large composite buildings under compartment fires)

/pdf/the-continuous-strength-method-for-structural-stainless-2let3r3ttu.pdf

The continuous strength method for structural stainless steel design.

https://bura.brunel.ac.uk/bitstream/2438/12159/3/Fulltext.pdf

Reliability analysis of structural stainless steel design provisions

https://bura.brunel.ac.uk/bitstream/2438/12357/3/Fulltext.pdf

Strength enhancements in cold-formed structural sections - Part I: Material testing

https://bura.brunel.ac.uk/bitstream/2438/14225/4/FullText.pdf

Sheida Afshan

Papers

The continuous strength method for structural stainless steel design

The continuous strength method for structural stainless steel design.

Reliability analysis of structural stainless steel design provisions

Strength enhancements in cold-formed structural sections - Part I: Material testing

Structural response and continuous strength method design of slender stainless steel cross-sections