DEVELOPMENT OF FRAGILITY FUNCTIONS FOR PREDOMINANT BUILDING TYPOLOGIES IN TÜRKİYE

Elif Yıldırım

(Thesis Supervisor: Prof. Dr. Ufuk Hancılar)

ABSTRACT

This thesis focuses on developing fragility functions for the predominant building typologies in Türkiye, specifically reinforced concrete frame and reinforced concrete frame with shear wall buildings categorized into low-rise, mid-rise, and high-rise structures. These buildings are further classified based on their seismic design codes: pre-code (before 1980), low-code (1980-2000), moderate-code (2000-2019), and high-code (post-2019).

A probabilistic seismic hazard assessment was conducted to identify ground motion intensity measures at different hazard levels. Ground motion records were carefully selected and scaled to match the target conditional spectra derived conditioning on spectral acceleration and average spectral acceleration. The selected ground motions were used in multiple-stripe analysis to perform dynamic analyses on various building models created in OpenSeesPy.

The analytical fragility functions derived from these analyses provide probabilistic estimates of the likelihood of exceeding different damage states given specific seismic intensity measures. These functions are crucial for assessing potential earthquake-induced damage and losses, helping to inform better earthquake preparedness and mitigation strategies. The results offer significant insights for government agencies, insurance companies, and researchers, supporting urban risk assessments and guiding retrofitting and reconstruction efforts. This research enhances understanding of the seismic performance of Turkish buildings and contributes valuable data for reducing earthquake risk and improving resilience in Türkiye.