Mechanical Properties of Stainless-Steel Cables at Elevated Temperature
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 7
Abstract
Investigating the mechanical properties of stainless-steel cables at elevated temperatures is important for the fire-resistant design and fire simulation analysis of prestressed structures. Stainless steel cables comprise several stainless-steel wires encircling a core wire in different layers. The overall mechanical capacity of a stainless-steel cable is attributed to the individual properties and collaborative mechanism of the stainless-steel wires. In this study considering the number of layers of a stainless-steel wire, 42 stainless steel cables with 19, 37, and 61 wires were tested under steady-state tension at ambient and elevated temperatures ranging from 100°C to 600°C. The test results show that the cables exhibit typical nonlinear characteristics with a lower proportional limit and no obvious yield plateau. There is no obvious effect of twisting characteristics on the elastic modulus of the cables; however, the ultimate tensile strength and 0.2% proof strength decrease gradually with the increase in the number of wire layers. The reduction factors of the mechanical properties of a stainless-steel material at elevated temperatures obtained as per EN1993-1-2 were higher than those obtained in this study, particularly of the 0.2% proof strength. Equations for the elastic modulus, ultimate strength, 0.2% proof strength, and fracture strain of the cables at elevated temperatures are proposed in this paper. Furthermore, a modified two-stage Ramberg–Osgood model for stainless steel cables at ambient and elevated temperatures is proposed.
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Acknowledgments
This work was sponsored by the National Nature Science Foundation of China (Grant No. 51408016) and the scientific research program of Beijing Education Committee (Grant No. KM201710005017). The authors gratefully acknowledge the support of Guangdong KINLONG Hardware Products Co., Ltd.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 7 • July 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jun 21, 2018
Accepted: Dec 17, 2018
Published online: Apr 27, 2019
Published in print: Jul 1, 2019
Discussion open until: Sep 27, 2019
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