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Installation of two accelerometric stations at the municipal gymnasium building of Kalochori


Within «D2.2: Design and implementation of permanent Aceelerographic and GNSS network» action of INDES-MUSA research program, a set of two 24bit accelerometric stations were installed on 16th of January 2014 at the municipal gymnasium of Kalochori. The exact locations of the stations shown in Figure 1 meet the research needs of seismic motion monitoring and study of soil-structure interaction within the industrial zone of the broader Kalochori region.


The first accelerometric station (KLH1) was installed at the roof slab of the structure (Figure 2). In this manner a double installation criterion is satisfied: (a) Installation next to a GNSS base reference station that had been installed on October 2013 as part of the INDES-MUSA monitoring network, thus achieving a collocated accelerometric - GNSS station and (b) Installation at a representative structure of the industrial zone of Kalochori.


The second accelerometric station (KLH2) was installed in a short warehouse located next to the gymnasium (Figure 3). Due to the small dimensions of the above structure insignificant effect of soil-structure interaction on the seismic recordings is anticipated, representing therefore an urban free-field installation within the particular zone of interest.

Both stations were configured on a continuous recording stream and real-time transfer of the acquired data through an ADSL internet connection at the central INDES-MUSA server of EPPO-ITSAK premises in Thessaloniki. A representative snapshot of recorded signals is given in Figure 4 referring to the Ζ, NS and EW component of motion from KLH1 and KLH2 stations. Figure 5 shows a map with the exact GPS coordinates of the stations allowing remote access and control of the stations state of health.     



Figure 1: Instrumentation of municipal gymnasium building of Kalochori within INDES-MUSA project


Figure 2: Installation of accelerometric station KLH1 (structural installation) at the roof slab of the municipal gymnasium building of Kalochori (collocated with a GNSS base reference station) 


Figure 3: Installation of accelerometric station KLH2 in a short warehouse structure (urban free field installation) next to gymnasium building 



Figure 4: Snapshot of KLH1 and KLH2 stations recordings in a continuous and real time data stream of the three (Ζ, NS, EW) components of motion



Figure 5: Map of the exact GPS locations of KLH1 and KLH2 accelerometric stations allowing the remote access and control of the stations state of health