Abstract
In this study, the seismic response of mid-rise buildings supported by end-bearing pile foundations under the influence of six different soil Plasticity Indices (PI) is investigated. FLAC3D is utilised to develop the soil-pile-structure system and perform fully nonlinear analysis in time domain adopting the direct method. The results in terms of shear forces developed in the superstructure, lateral building displacement, maximum inter-storey drift, lateral pile displacement and shear forces and bending moments developed along piles are presented. The results indicate the seismic response of the soil-pile-structure system is sensitive to the variation of PI. By considering the effects of PI, the seismic performance of the superstructure may shift from life safe zone to near collapse level. Moreover, the shear force imposed on the piles increases with PI, particularly in the top section of the pile near the ground surface due to the inertial interaction. Also, as PI increases, the bending moment developed in the piles increases and no need to mention the lateral pile displacement. Due to the load bearing mechanism, the maximum bending moment occurs at the pile toe socketed in the bedrock. Thus, appropriate soil Plasticity Index should be considered to obtain the safe and reasonable seismic design of mid-rise buildings resting on end-bearing pile foundations.
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Xu, R., Fatahi, B. (2019). Assessment of Soil Plasticity Effects on Seismic Response of Mid-Rise Buildings Resting on End-Bearing Pile Foundations. In: Fatahi, B., Mwanza, A., Chang, D. (eds) Sustainable Design and Construction for Geomaterials and Geostructures. GeoChina 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-95753-1_12
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