CORDIS OpenAire Bielefeld Academic Search Engine (BASE) Explore Bristol Research UnpayWall ZENODO Crossref Microsoft Academic Graph European Union Open Data Portal Earthquake Engineering &amp; Structural Dynamics Open Access 2020-06-22 Summary<p>Megathrust earthquake sequences, comprising mainshocks and triggered aftershocks along the subduction interface and in the overriding crust, can impact multiple buildings and infrastructure in a city. The time between the mainshocks and aftershocks usually is too short to retrofit the structures; therefore, moderate￢ﾀﾐsize aftershocks can cause additional damage. To have a better understanding of the impact of aftershocks on city￢ﾀﾐwide seismic risk assessment, a new simulation framework of spatiotemporal seismic hazard and risk assessment of future M9.0 sequences in the Cascadia subduction zone is developed. The simulation framework consists of an epidemic￢ﾀﾐtype aftershock sequence (ETAS) model, ground￢ﾀﾐmotion model, and state￢ﾀﾐdependent seismic fragility model. The spatiotemporal ETAS model is modified to characterise aftershocks of large and anisotropic M9.0 mainshock ruptures. To account for damage accumulation of wood￢ﾀﾐframe houses due to aftershocks in Victoria, British Columbia, Canada, state￢ﾀﾐdependent fragility curves are implemented. The new simulation framework can be used for quasi￢ﾀﾐreal￢ﾀﾐtime aftershock hazard and risk assessments and city￢ﾀﾐwide post￢ﾀﾐevent risk management.</p> Mainshock-aftershock sequences 550 seismic risk Damage accumulation seismic hazard Cascadia City-wide seismic risk 02 engineering and technology Wood-frame houses 01 natural sciences aftershocks 0201 civil engineering earthquake clustering 13. Climate action Cascadia subduction earthquakes Spatiotemporal ETAS seismicity model earthquakes State-dependent aftershock fragility curves 0105 earth and related environmental sciences Lizhong Zhang, Katsuichiro Goda, Maximilian J. Werner, Solomon Tesfamariam, 2020-06-21 journalpaper Summary<p>Megathrust earthquake sequences, comprising mainshocks and triggered aftershocks along the subduction interface and in the overriding crust, can impact multiple buildings and infrastructure in a city. The time between the mainshocks and aftershocks usually is too short to retrofit the structures; therefore, moderate￢ﾀﾐsize aftershocks can cause additional damage. To have a better understanding of the impact of aftershocks on city￢ﾀﾐwide seismic risk assessment, a new simulation framework of spatiotemporal seismic hazard and risk assessment of future M9.0 sequences in the Cascadia subduction zone is developed. The simulation framework consists of an epidemic￢ﾀﾐtype aftershock sequence (ETAS) model, ground￢ﾀﾐmotion model, and state￢ﾀﾐdependent seismic fragility model. The spatiotemporal ETAS model is modified to characterise aftershocks of large and anisotropic M9.0 mainshock ruptures. To account for damage accumulation of wood￢ﾀﾐframe houses due to aftershocks in Victoria, British Columbia, Canada, state￢ﾀﾐdependent fragility curves are implemented. The new simulation framework can be used for quasi￢ﾀﾐreal￢ﾀﾐtime aftershock hazard and risk assessments and city￢ﾀﾐwide post￢ﾀﾐevent risk management.</p> Spatiotemporal seismic hazard and risk assessment of M9.0 megathrust earthquake sequences of wood‐frame houses in Victoria, British Columbia, Canada 10.1002/eqe.3286 https://doi.org/10.1002/eqe.3286