Abstract
The present study was designed to demonstrate the importance of base-slab averaging and embedment effects on the foundation-level input motions due to earthquake excitations. Evaluation of foundation-level input motions based on the most commonly adopted kinematic interaction models are presented. In order to conduct this investigation, original records of horizontal accelerations for two case-study buildings were utilized. Computed foundation-level input motions, in both NS and EW directions, were compared to the actual acceleration-time histories recorded at the foundation levels. The results clearly indicate that incorporating base-slab averaging and embedment effects in seismic analyses can modify the dynamic excitation imposed at the foundation level, and, as a consequence, lead to more accurate structural response due to earthquake ground motions.
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Acknowledgments
The author acknowledge accessing strong-motion data through the Center for Engineering Strong Motion Data (CESMD). The networks or agencies providing the data used in this report are the California Strong Motion Instrumentation Program (CSMIP) and the USGS National Strong Motion Project (NSMP).
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Falborski, T. (2020). Evaluation of Foundation Input Motions Based on Kinematic Interaction Models. In: Köber, D., De Stefano, M., Zembaty, Z. (eds) Seismic Behaviour and Design of Irregular and Complex Civil Structures III. Geotechnical, Geological and Earthquake Engineering, vol 48. Springer, Cham. https://doi.org/10.1007/978-3-030-33532-8_2
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DOI: https://doi.org/10.1007/978-3-030-33532-8_2
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