The objective of this research is to analyse the safety of a base isolated building when is subjected to a resonance response in case of long-period ground motion and when this response induce the impact of the building against surrounding retaining walls. As a fundamental study, response of a target base isolated structure subjected to various earthquake input motions is performed. The analytical model considers a gap link element to study the collision against the retaining wall. maximum acceleration in upper structure increases in case of collision. This acceleration could originate the overturning of building content like furniture.
base isolation, collision, earthquake response analysis, link element.
 Hatada, K. & Cuadra, C., Dynamic response of low-rise building with different base isolation devices, Proceedings of the 15th European Conference on Earthquake Engineering, Istanbul, Turkey, 2014.
 Cuadra, C. & Meguro, J., Evaluation of the dynamic characteristics of a base-isolated low-rise RC building after the Great East Japan Earthquake, Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal, 24-28, September 2012.
 Sasaki, T., Sato, E., Fukuyama, K. & Kajiwara, K., Enhancement of base-isolation based on e-defense full scale shake table experiments: Dynamic response of base-isolated building under impact due to pounding. Proceedings of the 16th World Conference on Earthquake, 16WCEE 2017, Santiago Chile, 9–13 January 2017.
 Nakamura, S., Suzuki, T., Tojo, T., Asahara, S., Kinoshita, T. &Nakamura, N., Analytical study of the evaluation procedure and effect when base-isolated building collides with retaining wall, Proceedings of the 16th World Conference on Earthquake, 16WCEE 2017, Santiago Chile, 9–13 January 2017. (b) Bookshelf fall acceleration and floor response for model C (collision). Figure 9: Maximum acceleration responses.
 Miwada, G., Sano, T. & Katsumata, H., Experiments of Collision to Retaining Wall with Real-Scale Base-Isolated Building, Research Institute of Technology, Obayashi C orporation, Report No.74, 2010. (in Japanese)
 Miwada, G., Komaki, J., Sato, K., Sano, T., Katsumata, H., Takiyama, N. & Hayashi, Y ., Experiments and simulation analysis of collision to retaining wall with real scale baseisolated building, The Architectural Institute of Japan’s Journal of Structural and Construction Engineering, 76(663), 2011. (in Japanese). https://doi.org/10.3130/aijs.76.899
 Kaneko, M., Nakamura, Y., Kambara, H. & Tamura, K., Seismic safety evaluation method for building contents, Proceedings of the 14thWorld Conference on Earthquake Engineering, Beijing, China, 12–17 October 2008.