Abstract
The seismic response study of a layered liquefiable site is crucial in the seismic design of both aboveground and underground structures. This study introduces one-dimensional dynamic site response processes with advanced nonlinear soil constitutive models for non-liquefiable and liquefiable soils in the OpenSees computational platform. The solid-fluid fully coupled plane-strain u-p elements are used to simulate the soil elements. This study investigates the seismic response of a layered liquefiable site with specific focus on the development of excess pore water pressure, acceleration and post-earthquake ground surface settlement under two typical earthquake excitations. The numerical results show that the ground motion characteristics as well as the site profile have significant effects on the dynamic response of the layered liquefiable site. The loose sand layer with 35% relative density is more prone to liquefaction and contractive deformation under the same intensity of ground motion, resulting in irreversible residual deformation and vertical settlement. The saturated soil layer may efficiently filter the high-frequency components of ground motions while amplifying the low-frequency components. Meanwhile, during the post-earthquake excess pore pressure dissipation, the soil produce a large consolidation settlement.
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Acknowledgements
This work presented in this paper was supported by the Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration (Grant No. 2018D09), the National Key Research and Development Program of China (2018YFC1504305), and the National Natural Science Foundation of China (51978020).
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Shen, Y., Zhong, Z., Li, L., Du, X. (2022). Fluid-Solid Fully Coupled Seismic Response Analysis of Layered Liquefiable Site with Consideration of Soil Dynamic Nonlinearity. In: Wang, L., Zhang, JM., Wang, R. (eds) Proceedings of the 4th International Conference on Performance Based Design in Earthquake Geotechnical Engineering (Beijing 2022). PBD-IV 2022. Geotechnical, Geological and Earthquake Engineering, vol 52. Springer, Cham. https://doi.org/10.1007/978-3-031-11898-2_153
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DOI: https://doi.org/10.1007/978-3-031-11898-2_153
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