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Numerical studies on the effects of the lateral boundary on soil-structure interaction in homogeneous soil foundations

  • Li, Z.N. (College of Civil Engineering, Hunan University, College of the Architectural and Civil Engineering, Wenzhou University) ;
  • Li, Q.S. (Department of Building and Construction, City University of Hong Kong) ;
  • Lou, M.L. (State Key Laboratory for Disaster Reduction in Civil Engineering, Research Institute of Structural Engineering and Disaster Reduction, Tongji University)
  • 투고 : 2004.07.22
  • 심사 : 2005.04.01
  • 발행 : 2005.07.10

초록

In this paper, the finite element method is applied to investigate the effect of the lateral boundary in homogenous soil on the seismic response of a superstructure. Some influencing factors are presented and discussed, and several parameters are identified to be important for conducting soil-structure interaction experiments on shaking tables. Numerical results show that the cross-section width L, thickness H, wave propagation velocity and lateral boundaries of soil layer have certain influences on the computational accuracy. The dimensionless parameter L/H is the most significant one among the influencing factors. In other words, a greater depth of soil layer near the foundation should be considered in shaking table tests as the thickness of the soil layer increases, which can be regarded as a linear relationship approximately. It is also found that the wave propagation velocity in soil layer affects the numerical accuracy and it is suggested to consider a greater depth of the soil layer as the wave propagation velocity increases. A numerical study on a soil-structure experimental model with a rubber ring surrounding the soil on a shaking table is also conducted. It is found the rubber ring has great effect on the soil-structure interaction experiments on shaking table. The experimental precision can be improved by reasonably choosing the elastic parameter and width of the rubber ring.

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과제정보

연구 과제 주관 기관 : City University of Hong Kong

참고문헌

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피인용 문헌

  1. Analysis of wave propagation and soil–structure interaction using a perfectly matched layer model vol.81, 2016, https://doi.org/10.1016/j.soildyn.2015.10.008
  2. Experimental Study on the Seismic Response of Subway Station in Soft Ground vol.11, pp.05, 2017, https://doi.org/10.1142/S1793431117500208