Structural change detection applying long-term seismic interferometry by deconvolution method to a modern civil engineering structure (New Zealand)

Abstract Pulse-wave propagation velocity and resonance frequency measured in civil engineering structures are both related to structural design. Monitoring their variation following seismic strong shaking provides information about the immediate building capacity. Joint-interpretation of requires a better understanding processes controlling health. In this study, we analysed 8 years earthquake data recorded by vertical array installed Te Puni Wellington, New Zealand, as part GeoNet instrumentation programme. Co-seismic variations pulse wave fundamental interpreted through Timoshenko beam-like model. This study shows that even though no damage was visually reported over considered time monitoring, co- post-seismic parameters’ values observed for almost all earthquakes, including permanent shift ground shaking. Variations pulse-wave cross-interpreted terms They reflect variant response, correlated with loading. addition, delay function height relevant on location changes confirms efficient cross-interpretation methods Structural Health monitoring.