Abstract
Dynamic centrifuge model test was conducted to study the earthquake-induced differential settlement of foundation on cohesive ground, and the influence of asymmetry of building was investigated. During the experiment, the overconsolidated kaolin clay ground with a three-dimensional asymmetrical structure model was shaken by a basically balanced input motion, and bender elements were used to measure shear wave velocities of model ground to reveal the soil fabric evolution during and after shaking. The test results show that, the total seismic settlement of foundation is composed of instantaneous and long-term post-earthquake settlements, and most of the differential settlement occurs immediately after the earthquake while the post-earthquake settlement is relatively uniform despite its large amplitude. The asymmetry of building affects the settlement behavior considerably. Compared with 1-or 2-dimensional structures, more evident differential settlement occurs under three-dimensional asymmetrical building during shaking, which accounts for one-half of the total seismic settlements and results in complex spatial tilting effects of foundation.
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Supported by the National Basic Research Program of China (“973” Project) (Grant No. 2007CB714203), the China Postdoctoral Science Foundation (Grant Nos. 20080430219, 20081476) and the Foundation for Seismological Researches, China Earthquake Administration (Grant No. 200808022)
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Zhou, Y., Chen, Y., Shamoto, Y. et al. Centrifuge model test on earthquake-induced differential settlement of foundation on cohesive ground. Sci. China Ser. E-Technol. Sci. 52, 2138–2146 (2009). https://doi.org/10.1007/s11431-009-0198-x
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DOI: https://doi.org/10.1007/s11431-009-0198-x