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

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 are simulated using an equivalent single-degree-of-freedom (SDOF) model with a bespoke discrete damper account energy dissipation. performance various IMs compared simulation results four different block models under excitation conditions. In comparison some well-known IMs, proposed IM, determined by magnitude and frequency as well geometry parameters, displays considerably stronger correlation peak rotation block. comparative show that effective should consider not only characteristics but also geometric parameters. Finally, curve generated IM performs best significantly reducing dispersion.