Inhaltszusammenfassung

We analyze the potential of earthquake early warning for railway systems. With the rapid availability of earthquake parameters emergency measures before the strong-motion phase can be initiated. A flexible standard-based architecture is specified in EWS Transport to ensure future reusability of the design. The principle of functionality has been realized in an online demonstrator (http://ews-transport.iitb.fraunhofer.de). The federal state of Baden-Württemberg (BW), located in the south-west ...We analyze the potential of earthquake early warning for railway systems. With the rapid availability of earthquake parameters emergency measures before the strong-motion phase can be initiated. A flexible standard-based architecture is specified in EWS Transport to ensure future reusability of the design. The principle of functionality has been realized in an online demonstrator (http://ews-transport.iitb.fraunhofer.de). The federal state of Baden-Württemberg (BW), located in the south-west of Germany, serves as test area because of the availability of GIS railway data, knowledge of the railway operational system and information on the local geology. Different earthquake and sensor network scenarios are considered for implementing a large number of low-cost sensors in or near railway tracks. Earthquake parameters are extracted from the sensor network via artificial neural net technology. Estimates of magnitude, hypocenter and peak ground acceleration (PGA) are computed as soon as one station is triggered and are continuously updated using the incoming information from all triggered and not yet triggered stations. Alert maps displaying estimated PGA values are provided rapidly during the ongoing earthquake. Closed and speed reduced track segments for which the estimated PGA exceeds thresholds above which train operation must be considered unsafe are displayed instantly. Immediately after an event, shake maps based on the PGA values determined from the actual seismograms of each station are available for damage projection based on a damage catalogue, which contains various infrastructure elements together with their seismically relevant attributes.The EWS Transport information system is designed according to the principles of an open architecture with standard-based interfaces of system components. These interfaces ensure the flexible and easy exchange of components. The architecture document is set-up according to the ISO “Reference Model for Open Distributed Processing”. The architecture takes into account the standards of the Open Geospatial Consortium (OGC), especially those of the Sensor Web Enablement Group (Sensor Observation Service, Observation & Measurement Model). OGC standard services used in this workflow include Sensor Observation Service, Web Processing Service, Web Feature Service and Web Mapping Service. The results are visualized online in a Web mapping client where the different result layers (alert, hazard, shake, damage map) can be analyzed together with base layers (sensor stations, railway tracks, topography). Earthquake Early Warning Systems for Transportation Lines | Request PDF. Available from: https://www.researchgate.net/publication/258330905_Earthquake_Early_Warning_Systems_for_Transportation_Lines [accessed Mar 23 2018].» weiterlesen» einklappen

Autoren

Klassifikation

DDC Sachgruppe:
Geowissenschaften