A deconvolution scheme for determination of seismic loads in finite-element analyses

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper proposes a nonlinear time-domain finite-element method to generate three-direction seismic loads on the mesh boundary using the measured ground surface acceleration. The proposed scheme obtains correct earthquake responses around the major soil-structure interaction (SSI) region. The applied acceleration at the mesh bottom is first approximated as the measured acceleration on the soil surface. A time-domain finite-element analysis and a de convolution scheme are then performed to find the seismic acceleration at the mesh bottom. After several iterations, these acceleration data can be convergent to an acceptable accuracy. This paper also investigates the viscous and absorbing boundary methods to avoid fake reflection along the mesh boundary. The viscous boundary method is simple and can be applied to a standard finite-element code without difficulty; moreover, this scheme is also acceptably accurate, if appropriate damping is used in the interface layer. Thus, the viscous boundary method is suggested for use in the SSI analysis with the earthquake loading.

Original languageEnglish
Pages (from-to)258-267
Number of pages10
JournalBulletin of the Seismological Society of America
Volume103
Issue number1
DOIs
Publication statusPublished - 2013 Feb 1

Fingerprint

Deconvolution
deconvolution
mesh
soils
Soil structure interactions
soil-structure interaction
Earthquakes
earthquakes
absorbing boundary
Finite element method
earthquake
convolution integrals
finite element method
damping
iteration
soil surface
Damping
interactions
Soils
method

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

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A deconvolution scheme for determination of seismic loads in finite-element analyses. / Ju, S. H.

In: Bulletin of the Seismological Society of America, Vol. 103, No. 1, 01.02.2013, p. 258-267.

Research output: Contribution to journalArticle

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