A STRUCTURAL HEALTH MONITORING DATA MANAGING SCHEME WITH RESILIENCY TO SEISMIC EVENTS: IMPLEMENTATION ON A ROAD NETWORK BRIDGE

Abstract eng:
The motivation behind this work is the need for a resilient structural health monitoring (SHM) scheme for road network components that will allow for monitoring continuity and efficient data transfer after major seismic events. We have identified the critical specifications, in terms of resiliency, regarding key components of an SHM system, i.e., data transfer from the structure to the remote end user and energy supply of the SHM components. Based on these specifications, we propose an optimal SHM data managing scheme to be implemented on the already instrumented G9 bridge of the Egnatia motorway, in Western Macedonia, Greece, as a case study. The scheme is based on serial/ optical fiber data transfer from the data loggers to a local communication center, hybrid wired/ cellular/ satellite gateways from the local center to the end user, and uninterruptable power supply unit-based back up energy sources. The collected monitoring data will be made available to the end user/stakeholder - in our case, the RETIS-RISK platform for real-time seismic risk assessmentvia web access. The innovative elements of the proposed design are the redundant end user gateways and the use of satellite communication that will provide crucial independence from terrestrial telecommunication networks. The proposed data managing approach meets the identified specifications for resilient SHM and minimizes the possibility of data loss in case of major seismic events.

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