Experimental study on the cumulative damage constitutive model of high-performance steel Q345GJ under cyclic loading. (June 2021)

• Record Type: Journal Article
• Authors: Shen, Le; Ding, Miao; Feng, Chen; Yang, Bo; Elchalakani, Mohamed; Song, Lijuan
• Is Part Of: Journal of constructional steel research. Volume 181(2021)
• Publication Date: 2021-06
• Subjects: Q345GJ -- Cyclic loading -- Hysteretic curve -- Constitutive relationship -- Cumulative damage model; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2021.106620
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: GJ series steel is a new type of high-performance structural steel, which has emerged in China steel construction, and it has been widely utilized in steel-framed building structures. To investigate the low cycle fatigue performance and cumulative damage behaviors and find a suitable constitutive relationship of GJ series steel under cyclic loading, a total of eighteen Q345GJ steel low cycle fatigue experiments have been carried out. The mechanical behavior of Q345GJ steel were discussed, including monotonic loading behavior, hysteresis loading behaviors and energy dissipation capacity. Based on the cyclic behavior of GJ series steel, a modified cumulative damage model was recommended. Then, with comparison of the Q345GJ tests data (including the data in public papers) under various loading systems, the model proposed in this paper is proved correct and can be used to simulate the cyclic behavior of Q345GJ members. Graphical abstract: Unlabelled Image Highlights: The hysteretic curves, skeleton curves and other parameters of Q345GJ steel obtained from the cyclic test. The effect of cyclic loading protocol on the energy dissipation curves of Q345GJ steel has been discussed. A modified cumulated damage constitutive model of steel subjected to uniaxial cyclic loading was proposed.