Behaviour of S960 Ultra‐high Strength Steel Press‐braked Channel Sections

Abstract

AbstractThis paper reports a comprehensive experimental and numerical study of the cross‐sectional behaviour and resistances of press‐braked S960 ultra‐high strength steel (UHSS) channel section structural members. The experimental study was conducted on eight different ultra‐high strength steel plain channel sections, and comprised material testing, initial local geometric imperfection measurements, as well as a total of 10 stub column tests and 20 four‐point bending tests performed about the minor principal axes in both the ‘u’ and ‘n’ orientations. The experimental study was then supplemented by a finite element (FE) simulation programme, in which FE models were firstly developed to replicate the test structural responses and subsequently used to generate further numerical data over a wide variety of cross‐section sizes. On the basis of the experimental and numerical results, the assessment of the applicability of the codified provisions and formulations, established in the European code, to the design of S960 UHSS channel section stub columns and beams was conducted.