Simple Model of Soil-structure Interaction in Horizontal Motion Taking into Account the Nonlinearity of the Soil

Authors

  • Yaseen Shayah
    Affiliation
    Department of Structural Engineering, Faculty of Civil Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary
  • László P. Kollár
    Affiliation
    Department of Structural Engineering, Faculty of Civil Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary
https://doi.org/10.3311/PPci.40453

Abstract

Soil structure interaction is often modeled by lumped parameter models, which consist of connected springs, masses, and dashpots. It was shown that this model – even for the case of elastic behavior – can be rather inaccurate since radiation damping is not properly represented. Pap and her coauthor suggested a simple model that overcomes this problem: a simple infinitely long bar on an elastic foundation connected parallelly to a mass-spring system. Since soil nonlinearity can affect the response considerably, even in the case of moderate seismicity, Pap’s model is extended in this paper for nonlinear soil behavior. As a result, the 3D nonlinear soil can be replaced by a simple beam resting on a foundation and connected parallelly to a mass-spring system. In addition to the three elastic properties, the level of plastification must be prescribed. This model is recommended for the practical modeling of soil-structure interaction when the nonlinearity of the soil is significant.

Keywords:

soil-structure interaction, SSI, seismic analysis, radiation damping, linear, nonlinear

Citation data from Crossref and Scopus

Published Online

2025-06-13

How to Cite

Shayah, Y., Kollár , L. P. “Simple Model of Soil-structure Interaction in Horizontal Motion Taking into Account the Nonlinearity of the Soil”, Periodica Polytechnica Civil Engineering, 2025. https://doi.org/10.3311/PPci.40453

Issue

Section

Research Article