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Seismic response analysis of the deep saturated soil deposits in Shanghai

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Environmental Geology

Abstract

The quaternary deposits in Shanghai are horizontal soil layers of thickness up to about 280m in the urban area with an annual groundwater table between 0.5 and 0.7m from the surface. The characteristics of deep saturated deposits may have important influences upon seismic response of the ground in Shanghai. Based on the Biot theory for porous media, the water-saturated soil deposits are modeled as a two-phase porous system consisting of solid and fluid phases, in this paper. A nonlinear constitutive model for predicting the seismic response of the ground is developed to describe the dynamic characters of the deep-saturated soil deposits in Shanghai. Subsequently, the seismic response of a typical site with 280m deep soil layers, which is subjected to four base excitations (El Centro, Taft, Sunan, and Tangshan earthquakes), is analyzed in terms of an effective stress-based finite element method with the proposed constitutive model. Special emphasis is given to the computed results of accelerations, excess pore-water pressures, and settlements during the seismic excitations. It has been found that the analysis can capture fundamental aspects of the ground response and produce preliminary results for seismic assessment.

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Acknowledgments

This work was supported by Shanghai Leading Academic Discipline Project, Project Number: B308.

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Authors and Affiliations

  1. Department of Geotechnical Engineering, Tongji University, 200092, Shanghai, People’s Republic of China

    Yu Huang, Weimin Ye & Zhuchang Chen

Authors
  1. Yu Huang
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  2. Weimin Ye
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  3. Zhuchang Chen
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Correspondence to Yu Huang.

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Huang, Y., Ye, W. & Chen, Z. Seismic response analysis of the deep saturated soil deposits in Shanghai. Environ Geol 56, 1163–1169 (2009). https://doi.org/10.1007/s00254-008-1216-1

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  • DOI: https://doi.org/10.1007/s00254-008-1216-1

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