Probabilistic Incremental Dynamic Analysis for Seismic Isolation Systems through Integration with the NHERI-SimCenter Performance-Based Engineering Application

In the wake of the 1994 Northridge and 1995 Kobe earthquakes, structural designers adopted performance-based engineering concepts instead of traditional deterministic design approaches. The primary change was to evaluate the design according to stakeholders' interests instead of the engineering parameters. This evaluation process required a probabilistic estimation for the included variables at all design stages. The NHERI-SimCenter application framework provides generic solutions implemented in different hazard simulation problems. Seismic isolation is an efficient, proven technique for improving seismic performance by limiting drift ratios and reducing damage. During the design stage, seismic isolation-system parameters must be carefully calibrated to control different aspects of the response, and it is necessary to run multiple simulations and count for parameter uncertainties. This research introduced components for seismic isolation and incremental dynamic analysis procedures integrated with framework modules, such as uncertainty quantifications and damage and loss estimation. Furthermore, an illustrative case study was included to reflect the impacts of this development.

Automated summary

In response to the Northridge earthquake in 1994 and the Kobe earthquake in 1995, structural designers shifted from deterministic design approaches to performance-based engineering concepts. This involved evaluating designs based on stakeholders' interests rather than engineering parameters, requiring probabilistic estimation of variables throughout the design process. The NHERI-SimCenter application framework offers generic solutions for different hazard simulation problems. Seismic isolation, a proven technique for enhancing seismic performance, necessitates careful calibration of system parameters and accounting for uncertainties through multiple simulations. This research introduces components for seismic isolation and integrates them with framework modules including uncertainty quantification and damage estimation, with an illustrative case study highlighting the impacts of this development.