Abstract
To clarify the mechanical properties of the U-shaped steel damper under tension and compression along the opening direction and the energy dissipation mechanism in the energy dissipation system, a mechanical model was established to describe the plastic failure response of the damper, and the formula for theoretical calculation of its mechanical properties was derived. Using the straight line segment length, radius of circular arc, and opening direction as parameters for testing four specimens, through the design of reasonable pulling and pressing fixture, four specimens were tested for tension and compression. The initial stiffness and yield load test results and theoretical analysis were good and verified that the opening direction of the U-shaped steel damper affected its mechanical performance. Further analysis of the U-shaped steel damper’s mechanical properties using numerical finite element analysis of the arc radius and the straight line segment length, width and thickness in relation to the initial stiffness shows that increasing the straight section length and end arc radius can reduce initial stiffness, and increase the thickness and width can increase initial stiffness.
Highlights
As one of the common types of dampers, steel damper was first proposed by Kelly et al (1972) and Skinner et al (1974), and many scholars (Whittaker et al, 1991; Ricky Chan and Albermani, 2007; Lee et al, 2015; Xing and Guo, 2003; Wang, 2015; Yin et al, 2016; Huo et al, 2016; Qu et al, 2017) studied and improved various types of steel dampers
It can be seen that the opening orientation of the U-shaped steel damper affects its mechanical properties
The hysteresis curve obtained from the finite element analysis is full and shuttle-shaped, which indicates that the U-shaped steel damper has good energy dissipation performance
Summary
As one of the common types of dampers, steel damper was first proposed by Kelly et al (1972) and Skinner et al (1974), and many scholars (Whittaker et al, 1991; Ricky Chan and Albermani, 2007; Lee et al, 2015; Xing and Guo, 2003; Wang, 2015; Yin et al, 2016; Huo et al, 2016; Qu et al, 2017) studied and improved various types of steel dampers. According to the material property test, the yield strength obtained is 294 MPa. The radius of the damped circular arc part of the specimen in Group B is 64 mm, and the length of FIGURE 6 | The mechanical model of the specimen with the connecting plate as the rigid plate (R model). Mechanical Model of R-I As shown in Figure 6A , one end of the U-shaped steel damper is engaged with the rigid plate at node 2, and the in-plane hinge constraint is carried out at node 4. When M Mp, the U-shaped metal damping yields, and the vertical yield displacement at node 2 is denoted as vs At this point, the vertical yield displacement at the loading end of the specimen:δs vs. For Figure 6B in the model shown in , the bending moment of internal force at the central node 4 of the U-shaped metal damping arc is:. The loading speed is controlled at 0.1 mm/ s, and a cable displacement meter is installed on both sides of the U-shaped steel damper to measure the vertical displacement at the damper opening
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
