Ben Young

Biography

Professor Ben Young is currently the Vice President (Student Affairs) of The Hong Kong Polytechnic University.  He was Associate Dean of the Graduate School, Associate Dean of the Faculty of Engineering at The University of Hong Kong (HKU).  He was a professor of structural engineering in the Department of Civil Engineering, HKU.  He received BSc, BEng and PhD degrees from The University of Sydney, Australia in 1991, 1993 and 1998, respectively.

Professor Young is the Vice-President of the Hong Kong Institute of Steel Construction.  He is a committee member of the SEI/ASCE-8 Specification for the “Design of Cold-formed Stainless Steel Structural Members”, American Society of Civil Engineers.  He was one of the code writers for the „Hong Kong Code of Practice for the Structural Use of Steel“ published by the Buildings Department, The Government of the Hong Kong Special Administrative Region (HKSAR).  His research interests include cold-formed steel structures, testing and design of steel structures, high strength steel structures, stainless steel structures, aluminium structures, structural stability, fire resistance of metal structures and engineering education.  Professor Young is currently a Co-Editor-in-Chief of the Journal of Constructional Steel Research, ELSEVIER.  He has published over 500 international journal and conference papers, of which over 230 are SCI indexed journal papers.

Professor Young received the Michael G. Gale Medal for Distinguished Teaching Award in 2004 from The Hong Kong University of Science and Technology.  He also received the Best Teacher Award in 2006, the Outstanding Young Researcher Award in 2006, the Outstanding Teaching Award in 2008, the Outstanding Research Student Supervisor Award in 2015 and the Outstanding Researcher Award in 2017 from The University of Hong Kong.  Professor Young received the Best Research Paper Award given by the Journal of Structures, ELSEVIER in 2016.

Abstract

Cold-formed high strength steel RHS under combined bending and web crippling

Hai-Ting Li & Ben Young
Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China

This paper presents experimental and numerical investigations of cold-formed high strength steel rectangular hollow sections (RHS) under combined bending and web crippling. A total of 33 tests was conducted on high strength steel RHS with measured 0.2% proof stress ranged from 679 to 971 MPa. The combined bending and web crippling tests were performed using the Interior-One-Flange loading condition that specified in the North American Specification for cold-formed steel structures. The specimens were tested at various lengths to examine the interaction relationship between bending moment and concentrated interior bearing load. Finite element (FE) models were developed and verified against the test results for members under combined bending and web crippling as well as pure bending. Upon verification of the FE models, a parametric study was performed using the verified models to generate further numerical data over a wide range of web slenderness ratio, bearing length to thickness ratio and bearing length to web flat portion ratio. The ultimate strengths obtained from experimental and numerical investigations were compared with nominal strengths calculated using the European Code. It is shown that the codified bending and web crippling interaction formula can be used for the cold-formed high strength steel RHS members, while more accurate predictions can be achieved by using the recently proposed web crippling design rules.