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\uffe2\uff80\uff90size aftershocks can cause additional damage. To have a better understanding of the impact of aftershocks on city\uffe2\uff80\uff90wide 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\uffe2\uff80\uff90type aftershock sequence (ETAS) model, ground\uffe2\uff80\uff90motion model, and state\uffe2\uff80\uff90dependent 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\uffe2\uff80\uff90frame houses due to aftershocks in Victoria, British Columbia, Canada, state\uffe2\uff80\uff90dependent fragility curves are implemented. The new simulation framework can be used for quasi\uffe2\uff80\uff90real\uffe2\uff80\uff90time aftershock hazard and risk assessments and city\uffe2\uff80\uff90wide post\uffe2\uff80\uff90event risk management.
", "keywords": ["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"]}, "links": [{"href": "https://doi.org/10.1002/eqe.3286"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Earthquake%20Engineering%20%26amp%3B%20Structural%20Dynamics", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/eqe.3286", "name": "item", "description": "10.1002/eqe.3286", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/eqe.3286"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-06-21T00:00:00Z"}}, {"id": "20.500.11850/631801", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:26:45Z", "type": "Journal Article", "created": "2023-09-05", "title": "Application of the \u0395xtended KDamper to the Seismic Protection of Bridges: Design Optimization, Nonlinear Response, SSI and Pounding Effects", "description": "Open AccessThe paper investigates the seismic performance of a novel passive vibration isolation and damping device termed Extended KDamper (EKD). The concept is applied to a representative two-span highway bridge, initially designed on conventional seismic isolation (CSI) bearings. An optimization process is developed and executed to design the EKDs, underscoring the importance of accounting for seismic motion variability. Compared to CSI, the incorporation of EKDs leads to a 40% to 70% reduction in deck drifts. In contrast to the CSI bridge, which may sustain excessive bearing shear strains when subjected to the most adverse seismic motions within the examined set, the bearings of the EKD bridge never exceed the 200% threshold. Through the use of nonlinear 3D time-history analyses, it is demonstrated that the nonlinearity of the EKD elements may result in residual deck drifts. The nonlinear EKDs exhibit a variation in maximum drifts and accelerations on the order of\u2009\u00b120% compared to the preliminary (linear elastic) design for the examined set of spectrum-compatible motions. The increased accelerations result from the stiffening of the negative stiffness elements (NSEs), being more pronounced for seismic motions that entail large displacement demands. With the aid of a fully nonlinear 3D model of the entire soil \u2013 foundation \u2013 structure system, the effects of soil-structure interaction (SSI) are explored and shown to significantly influence the seismic response of the system. Deck collision with the abutments restricts the movement of the deck and pier; however, it compromises the performance of the EKDs and leads to a substantial increase in deck accelerations. Overall, EKDs may facilitate a more economical design and enhanced seismic performance, particularly for displacement-sensitive structures like rail bridges.", "keywords": ["negative stiffness", "bridges", "Seismic isolation; bridges; KDamper; negative stiffness; earthquakes; vibration control", "KDamper", "vibration control", "Seismic isolation", "earthquakes"]}, "links": [{"href": "https://www.tandfonline.com/doi/pdf/10.1080/13632469.2023.2250463"}, {"href": "https://doi.org/20.500.11850/631801"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Earthquake%20Engineering", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "20.500.11850/631801", "name": "item", "description": "20.500.11850/631801", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/20.500.11850/631801"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-09-05T00:00:00Z"}}, {"id": "10.1080/13632469.2023.2250463", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-27T16:18:58Z", "type": "Journal Article", "created": "2023-09-05", "title": "Application of the \u0395xtended KDamper to the Seismic Protection of Bridges: Design Optimization, Nonlinear Response, SSI and Pounding Effects", "description": "Open AccessThe paper investigates the seismic performance of a novel passive vibration isolation and damping device termed Extended KDamper (EKD). The concept is applied to a representative two-span highway bridge, initially designed on conventional seismic isolation (CSI) bearings. An optimization process is developed and executed to design the EKDs, underscoring the importance of accounting for seismic motion variability. Compared to CSI, the incorporation of EKDs leads to a 40% to 70% reduction in deck drifts. In contrast to the CSI bridge, which may sustain excessive bearing shear strains when subjected to the most adverse seismic motions within the examined set, the bearings of the EKD bridge never exceed the 200% threshold. Through the use of nonlinear 3D time-history analyses, it is demonstrated that the nonlinearity of the EKD elements may result in residual deck drifts. The nonlinear EKDs exhibit a variation in maximum drifts and accelerations on the order of\u2009\u00b120% compared to the preliminary (linear elastic) design for the examined set of spectrum-compatible motions. The increased accelerations result from the stiffening of the negative stiffness elements (NSEs), being more pronounced for seismic motions that entail large displacement demands. With the aid of a fully nonlinear 3D model of the entire soil \u2013 foundation \u2013 structure system, the effects of soil-structure interaction (SSI) are explored and shown to significantly influence the seismic response of the system. Deck collision with the abutments restricts the movement of the deck and pier; however, it compromises the performance of the EKDs and leads to a substantial increase in deck accelerations. Overall, EKDs may facilitate a more economical design and enhanced seismic performance, particularly for displacement-sensitive structures like rail bridges.", "keywords": ["negative stiffness", "bridges", "Seismic isolation; bridges; KDamper; negative stiffness; earthquakes; vibration control", "KDamper", "vibration control", "Seismic isolation", "earthquakes"]}, "links": [{"href": "https://www.tandfonline.com/doi/pdf/10.1080/13632469.2023.2250463"}, {"href": "https://doi.org/10.1080/13632469.2023.2250463"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Earthquake%20Engineering", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1080/13632469.2023.2250463", "name": "item", "description": "10.1080/13632469.2023.2250463", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1080/13632469.2023.2250463"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-09-05T00:00:00Z"}}, {"id": "10.1103/physrevapplied.17.054023", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-27T16:19:13Z", "type": "Journal Article", "created": "2022-05-13", "title": "Computational Verification and Experimental Validation of the Vibration-Attenuation Properties of a Geometrically Nonlinear Metamaterial Design", "description": "Closed AccessPhysical Review Applied, 17 (5)", "keywords": ["1-dimensional systems", "Acoustic metamaterials", "Nonlinear acoustics", "Numerical techniques", "0103 physical sciences", "Earthquakes", "Bragg structures", "Phononic crystals", "02 engineering and technology", "Acoustic techniques", "0210 nano-technology", "01 natural sciences"]}, "links": [{"href": "https://doi.org/10.1103/physrevapplied.17.054023"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Physical%20Review%20Applied", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1103/physrevapplied.17.054023", "name": "item", "description": "10.1103/physrevapplied.17.054023", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1103/physrevapplied.17.054023"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-05-13T00:00:00Z"}}, {"id": "10.1785/0120190121", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:20:39Z", "type": "Journal Article", "created": "2020-01-16", "title": "Variability of ETAS Parameters in Global Subduction Zones and Applications to Mainshock\u2013Aftershock Hazard Assessment", "description": "ABSTRACTMegathrust earthquake sequences can impact buildings and infrastructure due to not only the mainshock but also the triggered aftershocks along the subduction interface and in the overriding crust. To give realistic ranges of aftershock simulations in regions with limited data and to provide time-dependent seismic hazard information right after a future giant shock, we assess the variability of the epidemic-type aftershock sequence (ETAS) model parameters in subduction zones that have experienced M\uffe2\uff89\uffa57.5 earthquakes, comparing estimates from long time windows with those from individual sequences. Our results show that the ETAS parameters are more robust if estimated from a long catalog than from individual sequences, given individual sequences have fewer data including missing early aftershocks. Considering known biases of the parameters (due to model formulation, the isotropic spatial aftershock distribution, and finite size effects of catalogs), we conclude that the variability of the ETAS parameters that we observe from robust estimates is not significant, neither across different subduction-zone regions nor as a function of maximum observed magnitudes. We also find that ETAS parameters do not change when multiple M\uffc2\uffa08.0\uffe2\uff80\uff939.0 events are included in a region, mainly because an M\uffc2\uffa09.0 sequence dominates the number of events in the catalog. Based on the ETAS parameter estimates in the long time period window, we propose a set of ETAS parameters for future M\uffc2\uffa09.0 sequences for aftershock hazard assessment (K0=0.04\uffc2\uffb10.02, \uffce\uffb1=2.3, c=0.03\uffc2\uffb10.01, p=1.21\uffc2\uffb10.08, \uffce\uffb3=1.61\uffc2\uffb10.29, d=23.48\uffc2\uffb118.17, and q=1.68\uffc2\uffb10.55). Synthetic catalogs created with the suggested ETAS parameters show good agreement with three observed M\uffc2\uffa09.0 sequences since 1965 (the 2004 M\uffc2\uffa09.1 Aceh\uffe2\uff80\uff93Andaman earthquake, the 2010 M\uffc2\uffa08.8 Maule earthquake, and the 2011 M\uffc2\uffa09.0 Tohoku earthquake).
", "keywords": ["earthquake clustering", "550", "13. Climate action", "seismic hazard", "earthquakes", "01 natural sciences", "aftershocks", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1785/0120190121"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Bulletin%20of%20the%20Seismological%20Society%20of%20America", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1785/0120190121", "name": "item", "description": "10.1785/0120190121", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1785/0120190121"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-01-14T00:00:00Z"}}, {"id": "10.3929/ethz-b-000549998", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-27T16:22:12Z", "type": "Journal Article", "created": "2022-05-13", "title": "Computational Verification and Experimental Validation of the Vibration-Attenuation Properties of a Geometrically Nonlinear Metamaterial Design", "description": "Closed AccessPhysical Review Applied, 17 (5)", "keywords": ["1-dimensional systems", "Acoustic metamaterials", "Nonlinear acoustics", "Numerical techniques", "0103 physical sciences", "Earthquakes", "Bragg structures", "Phononic crystals", "02 engineering and technology", "Acoustic techniques", "0210 nano-technology", "01 natural sciences"]}, "links": [{"href": "https://doi.org/10.3929/ethz-b-000549998"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Physical%20Review%20Applied", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3929/ethz-b-000549998", "name": "item", "description": "10.3929/ethz-b-000549998", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3929/ethz-b-000549998"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-05-13T00:00:00Z"}}, {"id": "10.5281/zenodo.3048844", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:24:18Z", "type": "Journal Article", "created": "2021-02-14", "title": "Toolkit for resilience assessment of critical infrastructures to earthquake induced soil liquefaction disasters", "description": "The critical infrastructure resilience depends on several factors that go beyond the physical reliability and capacity to repair the system after a disruption. The overall critical infrastructure resilience includes aspects related to the social and economic backbone governing its capacity to deliver its service. This contribution presents a theoretical toolkit to calculate the overall resilience of critical infrastructures developed within the European project LIQUEFACT for earthquake- induced soil liquefaction disasters. The toolkit combine several aspects organized in three dimensions: organizational and management, the physical or technical system and operational capacity to deliver the service. The toolkit clearly defines also resilience aspects, such as preparedness, absorption, recovery and adaptation. For each dimension and aspect of the resilience several indicators are developed. A critical and technical explanation of each indicator is here proposed, as well a systematic methodology to combine them in the resilience toolkit. The novelty of this study is the systematic analysis of dimensions, aspects and indicators that made the proposed resilience toolkit original. The study is concluded with analyses of feasibility of the toolkit to natural disasters and applicability to localized disasters, such as earthquake-induced soil liquefaction events. Finally, the key factors of toolkit influencing a built asset model of critical infrastructures are identified.
", "keywords": ["soil liquefaction", "critical infrastructures", "built asset management", "11. Sustainability", "0502 economics and business", "05 social sciences", "0211 other engineering and technologies", "02 engineering and technology", "resilience", "earthquakes"], "contacts": [{"organization": "Mariantonietta Morga,, Jones, Keith,", "roles": ["creator"]}]}, "links": [{"href": "https://arro.anglia.ac.uk/id/eprint/704300/6/Morga_Jones_2019.pdf"}, {"href": "https://doi.org/10.5281/zenodo.3048844"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/IABSE%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.3048844", "name": "item", "description": "10.5281/zenodo.3048844", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.3048844"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-01-01T00:00:00Z"}}, {"id": "20.500.11850/549998", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:26:44Z", "type": "Report", "title": "Computational Verification and Experimental Validation of the Vibration-Attenuation Properties of a Geometrically Nonlinear Metamaterial Design", "description": "ISSN:2331-7019", "keywords": ["Acoustic metamaterials; Earthquakes; Nonlinear acoustics; Phononic crystals; 1-dimensional systems; Bragg structures; Acoustic techniques; Numerical techniques"], "contacts": [{"organization": "Chondrogiannis, Kyriakos Alexandros; id_orcid0000-0003-3771-7040, Colombi, Andrea; id_orcid0000-0003-2480-978X, Dertimanis, Vasilis, Chatzi, Eleni; id_orcid0000-0002-6870-240X,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/20.500.11850/549998"}, {"rel": "self", "type": "application/geo+json", "title": "20.500.11850/549998", "name": "item", "description": "20.500.11850/549998", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/20.500.11850/549998"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-05-01T00:00:00Z"}}, {"id": "oai:www.research-collection.ethz.ch:20.500.11850/549998", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-27T16:36:37Z", "type": "Report", "title": "Computational Verification and Experimental Validation of the Vibration-Attenuation Properties of a Geometrically Nonlinear Metamaterial Design", "description": "ISSN:2331-7019", "keywords": ["Acoustic metamaterials; Earthquakes; Nonlinear acoustics; Phononic crystals; 1-dimensional systems; Bragg structures; Acoustic techniques; Numerical techniques"], "contacts": [{"organization": "Chondrogiannis, Kyriakos Alexandros; id_orcid0000-0003-3771-7040, Colombi, Andrea; id_orcid0000-0003-2480-978X, Dertimanis, Vasilis, Chatzi, Eleni; id_orcid0000-0002-6870-240X,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/oai:www.research-collection.ethz.ch:20.500.11850/549998"}, {"rel": "self", "type": "application/geo+json", "title": "oai:www.research-collection.ethz.ch:20.500.11850/549998", "name": "item", "description": "oai:www.research-collection.ethz.ch:20.500.11850/549998", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/oai:www.research-collection.ethz.ch:20.500.11850/549998"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-05-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=earthquakes&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=earthquakes&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=earthquakes&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=earthquakes&offset=9", "hreflang": "en-US"}], "numberMatched": 9, "numberReturned": 9, "distributedFeatures": [], "timeStamp": "2026-07-28T16:14:39.638579Z"}