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

Hanquan Liu, Yong Huang and Xiaohui Liu ()
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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
Xiaohui Liu: Institute of Engineering Mechanics, China Earthquake Administration, No.1 Chaobai Street, Sanhe 065201, China

Sustainability, 2023, vol. 15, issue 3, 1-16

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.

Keywords: rigid blocks; rocking rotation; fragility curves; intensity measure; regression analysis; dispersion (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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