Buckling strength curves for estimating the strengths of thin-walled, cold-formed steel columns under compression using full-section tensile yield strengths
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Zhang, Peng
issued: 2022-01-06T22:38:33Z
issued: 2021
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: For designing Cold-Formed Steel (CFS) structural members under compression, AISI S100 (2016) incorporates the Direct Strength Method (DSM). Although the DSM has been used for quite some time, its buckling strength curves have issues and have not been thoroughly assessed with experimental data. In this study, buckling strength curves in the DSM were first assessed with an extensive experimental database containing axial strengths, failure modes, and design parameters of 453 solid and 228 perforated CFS columns. This exercise helped determine the merits and shortcomings of the buckling strength curves. Then, the buckling strength curves were assessed further, using full-section tensile yield strengths as design parameters instead of the virgin material tensile yield strengths. For determining the full-section tensile yield strengths of the columns, i) the model developed by Karren (1965) to predict the tensile yield strengths of CFS corners was modified to improve the accuracy and extend its application limit, and ii) the expression proposed by Karren (1965) for estimating the full-section tensile yield strengths of CFS members was modified to simplify its application. Strength estimations of the columns calculated using full-section tensile yield strengths were compared with those calculated using virgin material tensile yield strengths. Then its potential was tested whether the former could be more accurate and used than the latter after the buckling strength curves are recalibrated. Afterwards, compression tests were performed on 55 CFS columns having patterned perforations distributed along the length uniformly to enlarge the experimental database of perforated CFS columns. The columns had three different cross-sections, and each cross-section had seven different lengths varying from 250 mm to 2150 mm to capture different buckling failure modes. Before conducting the tests, extensive eigenbuckling analyses were performed for the columns, and a method was proposed …
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/80578
note: BUCKLING STRENGTH CURVES FOR ESTIMATING THE STRENGTHS OF THIN-WALLED, COLD-FORMED STEEL COLUMNS UNDER COMPRESSION USING FULL-SECTION TENSILE YIELD STRENGTHS by Peng Zhang M.Sc., Wuhan University of Technology, 2013 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) December 2021 © Peng Zhang, 2021 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, the dissertation entitled: BUCKLING STRENGTH CURVES FOR ESTIMATING THE STRENGTHS OF THIN-WALLED, COLD-FORMED STEEL COLUMNS UNDER COMPRESSION USING FULL-SECTION TENSILE YIELD STRENGTHS submitted by Peng Zhang in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Civil Engineering Examining Committee: Dr. Shahria Alam, School of Engineering Supervisor Dr. Kasun Hewage, School of Engineering Supervisory Committee Member Dr. Ahmad Rteil, School of Engineering Supervisory Committee Member Dr. Loïc Markley, School of Engineering University Examiner Dr. Kim Rasmussen, Faculty of Engineering, The University of Sydney External Examiner iii Abstract For designing Cold-Formed Steel (CFS) structural members under compression, AISI S100 (2016) incorporates the Direct Strength Method (DSM). Although the DSM has been used for quite some time, its buckling strength curves have issues and have not been thoroughly assessed with experimental data. In this study, buckling strength curves in the DSM were first assessed with an extensive experimental database containing axial strengths, failure modes, and design parameters of 453 solid and 228 perforated CFS columns. This exercise helped determine the merits and shortcomings of the buckling strength curves. Then, the buckling strength curves were assessed further, using full-section tensile yield strengths as design parameters instead of the vir…
has type: Thesis/Dissertation
date issued: 2022-02
is shown at: 10.14288/1.0406173
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Alam, M. Shahria
type: Text
identifier URI: http://hdl.handle.net/2429/80578