Compressive resistance of high-strength and normal-strength steel CHS members at elevated temperatures

Abstract

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Local stability of normal and high strength steel plates at elevated temperatures

“…This avoids the use of the material strengths within the descending branches of the elevated temperature stress-strain curves and enables the use of the elevated temperature ultimate strengths f u,θ = k u,θ f u in the estimations of the ultimate resistances of high strength steel plates in fire in these cases. In Kucukler [37], this approach was utilised in the determination of the ultimate strengths of high strength steel circular hollow section (CHS) members under compression in fire, which was shown to enable accurate estimations of their ultimate resistances.…”

“…A four-node reduced integration shell element, which is designated as S4R in the Abaqus [31] element library and takes account of membrane strains and transverse shear deformations, was utilised in all finite element simulations. This element type has previously been adopted to mimic the behaviour of structural steel elements in similar applications [36][37][38][39][40][41]. In the shell finite element models, the element size of 20 mm × 20 mm, corresponding to 20 elements along the 400 mm plate width, was used on the basis of a mesh sensitivity study.…”

Local buckling of stainless steel I-sections in fire: Finite element modelling and design

“…The numerical simulations were carried out using the finite element analysis software Abaqus [17]. The S4R element -a four-noded reduced integration general purpose shell finite element -was adopted in the finite element modelling; this element has been successfully utilised in similar previous applications [18][19][20][21][22]. To accurately capture the cross-section behaviour of stainless steel I-sections in fire, twenty elements were employed across each web plate; the number of the elements across each flange plate and along the length of the members was selected such that the aspect ratios of the elements were equal to unity [23].…”

In-plane structural response and design of duplex and ferritic stainless steel welded I-section beam–columns

“…The finite element models were created using the finite element analysis software Abaqus [32]. The four-noded reduced integration general purpose shell finite element referred to as S4R, which has been successfully used in similar applications [33,34,35,36,37], was utilised to establish all the finite element models in this paper. 16 elements were used to mesh each flange and web plate of the modelled I-sections in order to capture local buckling and the spread of plasticity through the cross-section depth accurately.…”