Abstract
This chapter aims at identifying, describing and quantifying multi-building interactions and site-city effects through experimental, theoretical and numerical crossed-analysis. Multiple Structure-Soil-Structure interactions are investigated through an idealized experimental model of a city on a soft layer the properties of which are simple enough to be reproduced in numerical and theoretical models. The experimental set-up is designed to provide a good matching between the fundamental frequencies of the city and of the layer. Experimental results show (i) drastic changes in the layer’s response with two low amplitude resonance peaks favorable to longer coda and beatings and (ii) unconventional depolarization effects. The resulting data is compared with the theoretical city-impedance model derived by homogenization methods (Boutin and Roussillon, Bull Seismol Soc Am 94(1):251–268, 2004) and with a 2D hybrid BEM-FEM numerical model (Padrón et al., Cálculo de estructuras de barras incluyendo efectos dinámicos de interacción suelo-estructura. Master thesis, Universidad de Las Palmas de G.C., Spain. http://hdl.handle.net/10553/10472, 2004). The specific features of multiple interactions are successfully reproduced by both models providing a qualitative and quantitative agreement with experimental results and with one another.
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Acknowledgement
The research leading to these results has received funding from the European Community’s Seventh Framework Program [FP7/2007–2013] for access to the University of Bristol’s Earthquake and Large Structures (EQUALS) Laboratory under grant agreement n° 227887. The authors would like to thanks E.Skuse, D.Ward, F.Sallet and H.Aldaikh for their very active support in the project. Satellite view in Fig 28.1a) is from Google Maps, available at https://maps.google.fr/ (last accessed July 2013).
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Schwan, L. et al. (2015). Multi-Building Interactions and Site-City Effect: An Idealized Experimental Model. In: Taucer, F., Apostolska, R. (eds) Experimental Research in Earthquake Engineering. Geotechnical, Geological and Earthquake Engineering, vol 35. Springer, Cham. https://doi.org/10.1007/978-3-319-10136-1_28
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DOI: https://doi.org/10.1007/978-3-319-10136-1_28
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