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Nonlinear response potential of mainshock-aftershock sequences from Japanese earthquakes

In earthquakes, a large mainshock triggers numerous aftershocks, exposing evacuees to significant risk and hampering restoration activities (2011 M9.0 Tohoku earthquake). To assess non-linear damage potential due to aftershocks, paper analyses dynamic responses of inelastic structures using real and artificial mainshock-aftershock sequences for Japanese earthquakes. Work extends conventional seismic hazard/risk analysis, which accounts for mainshocks only, and enables more comprehensive assessment of earthquake risk. This opens new research topic in seismology and earthquake engineering, and has led to active collaboration with Prof. Kawase [Kyoto University, Japan] supported by EPSRC Bristol Global Engagement Network grant (EP/K004581/1, £496k, 2012-3).