›› 2012, Vol. 33 ›› Issue (1): 120-128.

• Numerical Analysis • Previous Articles     Next Articles

Dynamic interaction of saturated soil-pile-structure system under seismic loading

LIU Lin-chao1，YANG Xiao2   

  1. 1. School of Civil Engineering, Xinyang Normal University, Xinyang, Henan 464000, China; 2. Department of Civil Engineering, Shanghai University, Shanghai 200072, China
  • Received:2010-05-10 Online:2012-01-10 Published:2012-01-17

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Abstract: The soil around the pile is regarded as saturated porous medium; and the horizontal dynamic impedance of saturated soil is obtained by using continuum mechanics; and the pile-saturated soil-pile interaction is modeled with dynamic Winkler spring and wave-interference by regarding the superstructure as a beam model; through the force equilibrium at the pile cap level, the pile groups and the structure were coupled; and dynamic interaction of saturated soil-pile-structure under harmonic SH wave is also investigated. The simplest case of a 2×2 pile group is formulated; and the effect of the structural parameters on the dynamic behaviors is analyzed; especially studied the seismic properties of the saturated soil-pile structure system. Numerical calculations show that the pile spacing, length-diameter ratio, ratio of modulus between pile and soil had great effect on the dynamic behaviors of coupled system of saturated soil-pile. The influence of pile spacing on earthquake amplification coefficient is concerned with external excitation frequency; the aseismic effect is better when the ratio of modulus between pile and soil is smaller and the damping of structure and pile is larger; and the greater the length-diameter ratio, the greater the structural deformation produced by seismic action.

Key words: porous medium, saturated soil, coupled coefficient, length-diameter ratio, dynamic interaction

CLC Number: 

  • TU 411
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