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

Hai Ting Li, Ben Young

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper presents experimental and numerical investigations of cold-formed high strength steel (CFHSS) rectangular hollow sections (RHS) under combined bending and web crippling. In the experimental investigation, 5 pure bending tests and 28 combined bending and web crippling tests were conducted on RHS with measured 0.2% proof stress in the flat portion of the section 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 validated against the test results for members under combined bending and web crippling as well as pure bending. Upon validation of the FE models, a parametric study was performed using the validated models to generate further numerical data over a wide range of web slenderness ratio, bearing length to web 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 CFHSS RHS members, while more accurate predictions can be achieved by using the recently proposed web crippling design rules.

Original languageEnglish
Title of host publicationProceedings of the International Colloquia on Stability and Ductility of Steel Structures, Prague, Czech Republic
Publication statusPublished - 1 Jan 2019
Event2019 International Colloquium on Stability and Ductility of Steel Structures, SDSS 2019 - Prague, Czech Republic
Duration: 11 Sep 201913 Sep 2019

Conference

Conference2019 International Colloquium on Stability and Ductility of Steel Structures, SDSS 2019
CountryCzech Republic
CityPrague
Period11/09/1913/09/19

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Building and Construction
  • Civil and Structural Engineering

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