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Fatigue Tests and Design of Thin Cold-Formed Square Hollow Section-to-Plate T-Connections under In-Plane Bending

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posted on 2023-05-16, 19:27 authored by Mashiri, FR, Zhao, XL, Grundy, P
Thin-walled tubular sections (t<4 mm) are increasingly being used in the road transportation industry and agricultural industry for applications such as lighting poles, traffic sign supports, truck trailers, swing-ploughs, haymakers, and linkage graders. These structures are subjected to fatigue loading and some failures have been observed. Both the International Institute of Welding and International Committee for the Development and Study of Tubular Construction fatigue guides for welded tubular joints apply only to tubes with a thickness above 4 mm. This paper deals with the fatigue design of tube-to-plate T joints under cyclic in-plane bending using the classification method. Forty-eight specimens, made up by welding a square hollow section tube (t<4 mm) to a plate, are fatigue tested. The effects of in-line galvanizing, steel grade, stress ratio, and tube wall thickness on the fatigue life of these joints are investigate. The design stress range-to-number of cycles (S-N) curves, derived from the least squares method of analysis, show that the S-N curves for the tube-to-plate joints lie above the existing S-N curves in the Australian, European, and Canadian standards.

History

Publication title

Journal of Structural Engineering

Volume

128

Pagination

22-31

ISSN

0733-9445

Department/School

School of Engineering

Publisher

American Society of Civil Engineers (ASCE)

Place of publication

USA

Repository Status

  • Restricted

Socio-economic Objectives

Metals

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