Abstract
Two structural configurations of the EuroProteas prototype structure, defining two test structures with different structural stiffness, were subjected to dynamic excitation to study the influence of soil-foundation-structure interaction effects on the recorded response. The first test structure was braced in all directions making a stiff structure frame based on soft ground. In contrast, we removed the bracing in the direction of loading in the second structure to significantly reduce its structural stiffness and the relative structure-to-soil stiffness ratio. Ambient noise measurements, free-vibration tests over a wide range of pull-out forces and forced-vibration experiments over a wide range of frequencies were included in the experimental series performed on both structures. The strong effects of the soil-foundation-structure interaction in the response of the stiff structure were expressed in the detected period elongation and the dominating rocking component which increased the radiation damping. The identified rocking stiffness was found to be frequency-dependent, in contrast to the lateral stiffness. On the contrary, the most significant proportion of the introduced energy was dissipated in the structural members of the second test structure, and the measured translation and rotation of the foundation were almost negligible.
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adapted from Tileylioglu et al. (2011)
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Acknowledgements
This study was performed in the framework of the Transnational Access Project “Soil Frame-Interaction Analysis through large-scale tests and advanced numerical finite element modeling” funded under the European project “Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe—SERA-TA – H2020 (Grant Agreement 730900)”. We want to acknowledge the contribution of ITSAK-EPPO for providing us with part of the instrumentation and human resources to execute the tests. The help of Emmanouil Rovithis, Nikos Adam, Apostolos Marinos is greatly appreciated. We want to thank Christos Petridis, Maria Manakou, Angelos Tsinaris, and all the Research Unit of Soil Dynamics and Geotechnical Earthquake Engineering of AUTH (Aristotle University of Thessaloniki) for contributing to the successful execution of the tests.
Funding
This study was performed in the framework of the Transnational Access Project “Soil Frame-Interaction Analysis through large-scale tests and advanced numerical finite element modeling” funded under the European project “Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe—SERA-TA – H2020 (Grant Agreement 730900)”.
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Vratsikidis, A., Pitilakis, D., Anastasiadis, A. et al. Evidence of soil-structure interaction from modular full-scale field experimental tests. Bull Earthquake Eng 20, 3167–3194 (2022). https://doi.org/10.1007/s10518-021-01286-8
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DOI: https://doi.org/10.1007/s10518-021-01286-8