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Regional-Scale Seismic Fragility Assessment of Buildings in Istanbul Using Simulated Ground Motions

Description: 

Manifold studies have demonstrated the validity of simulated ground motions from various perspectives, i.e., via the comparisons of time-series against recorded motions, response spectra versus ground motion prediction equations (GMMs), and engineering demand parameters (EDPs) under different intensity measures (IMs). In particular, simulated ground motions become more appealing for those seismic-prone regions in which recorded motions are scarce or GMMsare unavailable. In the past, modest computational resources hindered the simulation of high frequency ground motions, which is a crucial factor to perform nonlinear time history analysis of structures. In this study, as continuation of an ongoing earthquake research for the Istanbul city, we utilize measured material properties and geological site conditions from a comprehensive microzonation study, high-resolution topography data, and realistic fault rupture models. A suite of 57 physics-based large-scale earthquake ground motion simulations with highest frequency that can reach up to 12 Hz, are carried out by means of supercomputing facilities. A detailed building inventory that consists of more than 16,000 buildings in the Zeytinburnu district of Istanbul is adopted to build the structural models and conduct massive nonlinear structural analysis. Finally, following a probabilistic seismic demand analysis (PSDA), we investigate the seismic fragility of buildings at regional scale. This study can further enhance the accuracy of seismic fragility assessment of buildings in the Zeytinburnu district.

Session: Advances in Probabilistic Seismic Hazard Analysis and Applications [Poster]

Type: Poster

Date: 4/20/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: Wenyang Zhang

Student Presenter: No

Invited Presentation: 

Authors