In conclusion, the blasting performed in the excavation work at Leonhardstrasse induces amplitudes in local buildings large enough to be felt. However, this blasting is not affecting the structural integrity of the NO building since it does not excite the building resonance frequencies.
The blasting will continue until September, and more recordings at NO are planned towards the end of this excavation. The data are stored in the SED archive and will be accessible to the community via the Arclink server (arclink.ethz.ch; Station Name: NOETH). This work is a collaboration between SED and the Institut für Baustatik und Konstruktion (IBK).
See also: Michel C., Guéguen P., Bard P.Y. “Dynamic parameters of structures extracted from ambient vibration: an aid for the seismic vulnerability assessment of existing buildings”, Soil Dynamics and Earthquake Engineering, 28(8), (593-604), August 2008.
Acknowledgements: This temporary network was installed by Franz Weber and Clotaire Michel. The SED archive is maintained by E-lab. The Arclink server to access the data was designed and maintained by Carlo Cauzzi.