Determination of Input Energy Profile in Structures Through Seismic Interferometry

Abstract

Strength- and displacement-based analysis methods are the most common methods employed in practice and current structural design codes. Significant features of earthquakes such as duration, frequency content, and also hysteretic behavior of the structures are not taken into consideration with these methods. However, in the energy-based method, which is derived from the equation of motion coupled with structure’s instantaneous displacement response, strength and displacement characteristics could be directly incorporated including the effect of the duration and frequency content of the earthquake. In earthquake engineering, vibration methods such as cross-correlation, cross-coherence, and deconvolution are general mathematical solution techniques used in terms of seismic interferometry (Wapenaar et al., Geophysics, 75(5):75–195, 2010; Geophysics, 75(5):75211–75227, 2010). In this study, input energy profile along the height of the structure in terms of shear wave propagations was investigated using seismic interferometry methodology. The main objective was to determine how the energy components between layers of the structure are distributed using seismic interferometry methodology.