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An Intensity Measure for the Rocking Fragility Analysis of Rigid Blocks Subjected to Floor Motions

Author

Listed:
  • Hanquan Liu

    (Institute of Engineering Mechanics, China Earthquake Administration, No.1 Chaobai Street, Sanhe 065201, China)

  • Yong Huang

    (Key Lab of Structural Dynamic Behavior and Control of the Ministry of Education, School of Civil Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
    Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China)

  • Xiaohui Liu

    (Institute of Engineering Mechanics, China Earthquake Administration, No.1 Chaobai Street, Sanhe 065201, China)

Abstract

A novel intensity measure ( IM ), dimensionless floor displacement, is presented for evaluating the seismic fragility of freestanding rigid blocks subjected to one-sine acceleration pulses in this paper. The rocking responses of rigid blocks are simulated using an equivalent single-degree-of-freedom (SDOF) model with a bespoke discrete damper to account for energy dissipation. The performance of various IM s is compared using simulation results for four different block models under different excitation conditions. In comparison to some well-known IM s, the proposed IM , determined by excitation magnitude and frequency as well as block geometry parameters, displays a considerably stronger correlation with the peak rotation of the rocking block. The comparative results show that effective IM s should consider not only the excitation characteristics but also the block geometric parameters. Finally, the fragility curve generated by the proposed IM performs best by significantly reducing the dispersion.

Suggested Citation

  • Hanquan Liu & Yong Huang & Xiaohui Liu, 2023. "An Intensity Measure for the Rocking Fragility Analysis of Rigid Blocks Subjected to Floor Motions," Sustainability, MDPI, vol. 15(3), pages 1-16, January.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:3:p:2418-:d:1050669
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    Cited by:

    1. Hanquan Liu & Yong Huang & Xiaohui Liu, 2023. "Seismic Overturning Fragility Analysis for Rigid Blocks Subjected to Floor Motions," Sustainability, MDPI, vol. 15(6), pages 1-16, March.

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