Discrete impedance matrix for flexible surface foundations

Andreas Maravas, George Mylonakis, Dimitris L. Karabalis

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2 Citations (Scopus)

Abstract

Knowledge on the subject of dynamic soil-structure interaction (SSI) has been derived mainly from studies on rigid foundations. The seismic response of structures resting on flexible foundations has received considerably less attention and the results of these efforts have not yet lead to established computational procedures of general acceptance, such as those developed for structures resting on rigid foundations (ATC-3, NEHRP-03, IBC, EC-8). In this paper, a rigorous computational procedure for the analysis of soil-flexible foundation-structure interaction is developed based on the finite element method. Thus, a full model of the soil-flexible foundation system is constructed and the discrete (in space), frequency dependent, impedance matrix of the system is obtained. To this end the special purpose finite element program ACS SASSI is utilized taking into consideration the infinite extent of the soil medium. A simplified, under certain conditions, frequency independent impedance matrix is also presented. The above impedance matrices are used in a straightforward manner for the dynamic/seismic analysis of structures resting on flexible mat foundations in frequency domain.

Original languageEnglish
Title of host publicationECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference
PublisherNational Technical University of Athens
Pages3153-3161
Number of pages9
Publication statusPublished - 1 Jan 2013
Event4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2013 - Kos Island, Greece
Duration: 12 Jun 201314 Jun 2013

Conference

Conference4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2013
CountryGreece
CityKos Island
Period12/06/1314/06/13

Keywords

  • Flexible foundations
  • Impedance matrix
  • Soil-structure interaction
  • Structural dynamics

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