Twodimensional hybrid modelling of soilstructure interaction
Abstract
A hybrid model formed by partitioning a soil structure system into a near field and a far field was used to analyze three dimensional soil structure interaction problems. The near field which consists of the structure and a finite region of soil around it is modeled by the finite element method. The far field which accounts for the loss of energy due to stress waves traveling away from the foundation is modeled through continuous impedance functions. The same technique is applied to the two dimensional case. To determine the two dimensional frequency dependent impedance functions, a method of system identification is used to insure that the resulting hybrid model reproduces the known compliances of an infinite rigid strip on an elastic half space. These impedance functions have been employed to calculate the compliances of the strip for different R/a ratios. Good agreement between the computed and known compliances is shown.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 August 1981
 Bibcode:
 1981STIN...8228489T
 Keywords:

 Far Fields;
 Mathematical Models;
 Near Fields;
 Soil Mechanics;
 Structural Analysis;
 Finite Element Method;
 Frequencies;
 Functions (Mathematics);
 Impedance;
 Engineering (General)