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Thermal–mechanical deformation of Galfan-coated steel strands at elevated temperatures
Abstract The deformation of Galfan-coated steel strands at elevated temperatures causes prestress loss and structural stiffness reduction, which leads to a reduction in the overall bearing capacity and the collapse of the structure. Hence, it is necessary to investigate the deformation of Galfan-coated steel strands at elevated temperatures. In this study, elevated temperature tests were performed on 24 Galfan-coated steel strands, and the deformation behavior of Galfan-coated steel strands of different diameters under eight different stress–temperature conditions were analyzed. The temperature deformation curves of the strands were plotted for temperatures ranging from 30 to 500 °C. In addition, an equation that expresses the relationship between deformation, temperature, and initial stress in the thermal–mechanical coupling state in the heating stage was derived. The parameters in the equation were fitted, and a uniform expression of the parameters was derived. Furthermore, the equation showing the relationship between the parameters for the creep model and temperature T for the constant-temperature stage was established
Graphical abstract Display Omitted
Highlights Twenty-four Galfan-coated steel strands were tested at elevated temperatures. An equation relating the temperature and initial stress with deformation of Galfan-coated steel strands was derived. Parameters of the Fields and Fields creep model of the Galfan-coated steel strands were established.
Thermal–mechanical deformation of Galfan-coated steel strands at elevated temperatures
Abstract The deformation of Galfan-coated steel strands at elevated temperatures causes prestress loss and structural stiffness reduction, which leads to a reduction in the overall bearing capacity and the collapse of the structure. Hence, it is necessary to investigate the deformation of Galfan-coated steel strands at elevated temperatures. In this study, elevated temperature tests were performed on 24 Galfan-coated steel strands, and the deformation behavior of Galfan-coated steel strands of different diameters under eight different stress–temperature conditions were analyzed. The temperature deformation curves of the strands were plotted for temperatures ranging from 30 to 500 °C. In addition, an equation that expresses the relationship between deformation, temperature, and initial stress in the thermal–mechanical coupling state in the heating stage was derived. The parameters in the equation were fitted, and a uniform expression of the parameters was derived. Furthermore, the equation showing the relationship between the parameters for the creep model and temperature T for the constant-temperature stage was established
Graphical abstract Display Omitted
Highlights Twenty-four Galfan-coated steel strands were tested at elevated temperatures. An equation relating the temperature and initial stress with deformation of Galfan-coated steel strands was derived. Parameters of the Fields and Fields creep model of the Galfan-coated steel strands were established.
Thermal–mechanical deformation of Galfan-coated steel strands at elevated temperatures
Sun, Guojun (Autor:in) / Xiao, Shuo (Autor:in) / Qu, Xiushu (Autor:in)
07.02.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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