Axial Fatigue Performance of Cold-Formed Steel Sections
Publication: Journal of Structural Engineering
Volume 124, Issue 2
Abstract
During the expected service life of a transmission tower, the members are subjected to a large number of significant stress fluctuations resulting from alternating wind applications. Fatigue behavior due to repeated loading must therefore be considered in design. This study presents the fatigue-test results of 52 cold-formed steel members. The experimental program involved the use of five cross-sectional shapes, two test temperatures (−50°C and 25°C), and two steel types, ASTM A715 grade 60 steel and CAN/CSA-G40.21-M 300W. A series of constant amplitude axial fatigue tests were conducted using a loading frequency that ranged from 1–2.5 Hz. All specimens were supported at the ends through bolted connections and were tested under load-controlled condition in a fully reversed load-cycle. Stress-strain response was monitored at different stages of the test until failure. A group of S-N and Load-N curves were developed for the purpose of determining the safe endurance limit. The results obtained could be used to establish guidelines for fatigue design of cold-formed steel sections.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 124 • Issue 2 • February 1998
Pages: 149 - 157
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Feb 1, 1998
Published in print: Feb 1998
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