Fragility Analysis of Buildings Under Mainshock-Aftershock Sequences: Simulation Data and Results

This simulation investigates the seismic fragility of buildings subjected to mainshock-aftershock sequences to assess their progressive damage and structural vulnerability. The study utilizes Nonlinear Time History Analysis (NTHA) implemented in OpenSeesPy, incorporating Monte Carlo Simulation (MCS) and Multiple Strip Analysis (MSA) to model damage accumulation under successive seismic events. The dataset includes structural response parameters, fragility curves, and probability distributions of damage states across varying hazard intensities.

The results provide critical insights into the incremental damage effects of aftershocks, which are often overlooked in conventional fragility assessments. These findings contribute to improved seismic risk modeling, community resilience planning, and performance-based engineering. The data can be reused by researchers and engineers for developing advanced fragility models, validating resilience frameworks, and integrating aftershock considerations into structural design and retrofitting strategies.