The objective of this paper is to evaluate the effects of
soil-structure interaction (SSI) on the modal characteristics and on
the dynamic response of current structures. The objective is on the
overall behaviour of a real structure of five storeys reinforced
concrete (R/C) building typically encountered in Algeria. Sensitivity
studies are undertaken in order to study the effects of frequency
content of the input motion, frequency of the soil-structure system,
rigidity and depth of the soil layer on the dynamic response of such
structures. This investigation indicated that the rigidity of the soil
layer is the predominant factor in soil-structure interaction and its
increases would definitely reduce the deformation in the R/C
structure. On the other hand, increasing the period of the underlying
soil will cause an increase in the lateral displacements at story levels
and create irregularity in the distribution of story shears. Possible
resonance between the frequency content of the input motion and soil
could also play an important role in increasing the structural
 The Boumerdes, Algeria, Earthquake of May 21, 2003 EERI Learning
from Earthquakes Reconnaissance Report October 2003 Earthquake
Engineering Research Institute 2003-04.
 P. C. Jennings and J. Bielak, “Dynamics of building-soil interaction,”
Bulletin of the Seismological Society of America; 1973, 63: 9-48.
 J.P. Wolf, Dynamic soil-structure interaction. Prentice Hall. 1985.
 G. Gazetas, “Analysis of machine foundation vibrations: state of the
art,” J. Soil Dynamics and Earthquake Engng., 1983, 2, 2-42.
 R. J. Apsel and J. E. Luco, “Impedance Functions for Foundations
Embedded in a Layered Medium: An Integral Equation Approach,”
Earthquake Engng. and Struct. Dynamics, 1987, 15, 213-231.
 K. Baba, K. Park and N. Ogava, “Soil-structure interaction systems on
the base of the ground impedance functions formed in to a chain of
impulses along the time axis,” Proceeding of the eleventh world
conference on earthquake engineering. Acapulco, Mexico. 1996.
 J.P. Wolf, and C. Song. Finite Element Modelling of Unbounded Media.
West Sussex: John Wiley & Sons. 1996.
 L. Menglin, and W. Jingning, “Effects of Soil-Structure Interaction on
Structural Vibration Control,” Dynamic Soil-Structure Interaction:
Current Research in China and Switzerland, ed. Z. Chuhan & J.P. Wolf,
Elsevier Science, Amsterdam, 189-202. 1998.
 R. B. J. Brinkgreve, et al., “Plaxis Finite Element Code for Soil and
Rock Analyses,” Delft University of Technology, The Netherlands,
 J. Lysmer, R. L. Kuhlmeyer, “Finite Dynamic Model for Infinite
Media,” ASCE J. of the Eng. Mech. Div., 1969, pp. 859-877.
 J. M. Rosset, E. Kausel, “Dynamic Soil-Structure Interaction,” Proc.
Second International Conference on Numerical Methods in
Geomechanics, Blacksburg, Virginia, 1976, V 2, 3-19.