City Research Online

Abstract

Typical recorded acceleration traces of seismic ground motions (GMs) exhibit a time-varying frequency composition due to the dispersion of different types of seismic waves having different amplitudes and pre-dominant frequencies and arriving at the recording station at different time instants. However, none of the current GM properties used in earthquake engineering to quantify the structural damage potential of GMs account for the time-evolving trends of GM frequency content. Indeed, intensity measures (IMs) and record selection criteria adopted in the context of performance-based earthquake engineering (PBEE) do not account for the non-stationary frequency content of GMs. This lack of a metric to characterise non-stationary frequency content in recorded GMs has hindered, consequently, the systematic investigation of the influence of the evolutionary frequency content of recorded GMs to the inelastic response of different types of yielding structures. To address this gap in the current state-of-knowledge, this thesis puts forth a novel scalar quantity termed alpha, “

Publication Type:	Thesis (Doctoral)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Departments:	Doctoral Theses School of Science & Technology > School of Science & Technology Doctoral Theses School of Science & Technology > Engineering > Civil Engineering

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