›› 2017, Vol. 38 ›› Issue (4): 1114-1120.doi: 10.16285/j.rsm.2017.04.024

• Geotechnical Engineering • Previous Articles     Next Articles

Seismic response analysis of nuclear island buildings considering soil-structure interaction and nonlinear soil foundation

YIN Xun-qiang1, JIN Yu-hao2, WANG Gui-xuan1   

  1. 1. R&D Center of the Civil Engineering Technology, Dalian University, Dalian, Liaoning 116622, China; 2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
  • Received:2015-05-29 Online:2017-04-11 Published:2018-06-05
  • Supported by:

    This work was supported by the Doctoral Scientific Research Foundation of Liaoning Province (201601309), the National Grand Science and Technology Special Project of China (2011ZX06002-10), the General Project of Department of Education of Liaoning Province (L2014498) and the Outstanding Young Doctor Special Fund of Dalian University (2015YBL010).

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Abstract: The effective simulation of soil-structure interaction and the nonlinear characteristics of soil is a key technical problem for conducting a seismic response analysis of soil foundations on nuclear island. A one-dimensional finite element model of nuclear structure is established on the software platform of SuperFLUSH by simulating the radial damping through setting viscous artificial boundary in the limited area of foundation to analyze the response of free field to the ground motion input, then to describe the nonlinear dynamic characteristics in the near field ground using equivalent linear method. Furthermore a case study of a simplified lumped mass model for CPR1000 nuclear reactor in the soil foundation is investigated about the effect of SSI and nonlinear layered soil foundation on the seismic response characteristics of nuclear island building structure. Numerical results verify the reliability and applicability of the proposed model in engineering application. With the consideration of SSI effect, the model of viscous artificial boundary can effectively absorb the energy of scattered waves and reduce structural response. With the consideration of the nonlinear characteristics of soil, the acceleration amplitudes decrease to a certain extent in different directions, and the peak frequency shifts to low frequency. Based on above analysis, the combination of SSI and the nonlinear characteristics of soil is necessary for seismic analysis of nuclear island.

Key words: viscous boundary, effect of SSI, soil foundation, equivalent linear method, seismic response of nuclear island plant

CLC Number: 

  • TU 473.1

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