Energy dissipation by nonlinear soil strains during soil–structure interaction excited by SH pulse

Gičev, Vlado; Trifunac, Mihailo D.

doi:10.1016/j.soildyn.2012.07.008

Cited by 20 publications

(14 citation statements)

References 41 publications

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“…For completeness of this presentation, we briefly summarize the characteristics of the finite difference model, following Gičev and Trifunac [18]. To set up the grid spacing in this model we need enough spatial points for accurate reconstruction of the waveforms.…”

Section: Appendix a The Model And Finite Difference Formulationmentioning

confidence: 99%

“…We then consider the following cases of nonlinearity, depending upon C (see [18]): ≥ C 2: Small nonlinearity. Permanent strain does not occur until the wave hits the foundation.…”

Section: Appendix B Energy and Strainsmentioning

confidence: 99%

“…To study just the effect of scattering by the foundation, [17,18] we assumed the building to be high enough so that the reflected wave from the top of the building cannot reach the buildingfoundation contact during the time of the analysis. The analysis was terminated when the wave completely exited the soil island.…”

Section: Appendix B Energy and Strainsmentioning

confidence: 99%

“…It is also well understood that in the presence of soil structure interaction (SSI), rigid foundations scatter considerable energy of incident seismic waves and that such scattering depends on the foundation shape and its relative stiffness [14,31,53,54,75]. While such scattered energy is relatively small for actual foundations of buildings-as such foundations are never as rigid as their mathematical models [33,42,72]-the scattering from flexible foundations still plays an important role in bringing about pockets of nonlinear soil deformation, which then leads to increased effective compliances and their asymmetries [17,18]. Observations of the response of full-scale structures to earthquake shaking show how prominent these nonlinearities in the soil structure systems can be [45,[68][69][70][71].…”

Section: Introductionmentioning

confidence: 99%

“…Nonlinear site response is a complex problem that involves many geometrical and material parameters in the description of the governing models [18,19,41,63]. Hence, in the following, our goal will be to illustrate only what may occur in the presence of nonlinearities in the soil and the foundation during SSI while the anisotropic building remains linear.…”

Section: Introductionmentioning

confidence: 99%

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Two-dimensional translation, rocking, and waves in a building during soil-structure interaction excited by a plane earthquake SV-wave pulse

Gičev

Trifunac

Orbović

2016

Soil Dynamics and Earthquake Engineering

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Nonlinear waves in the soil Partition of incident SV-wave earthquake energy into translation, rocking and wave motion a b s t r a c t A two-dimensional (2-D) model of a building supported by a rectangular, flexible foundation embedded in the soil is analyzed for excitation by an incident plane SV-wave. The incidence is below the critical angle. The building is assumed to be anisotropic and linear while the soil and the foundation are assumed to be isotropic and can experience nonlinear deformations. In general the work spent for the development of nonlinear strains in the soil can consume a significant part of the input wave energy and thus less energy is available for the excitation of the building. We show that the energy distribution in the building depends on the nature of the incident wave and differs substantially between the cases of incident P-and SV-waves. However, for both excitation by a plane SV-wave pulse and excitation by a P-wave, we show that the nonlinear response in the soil and the foundation does not significantly change the nature of excitation of the base of the building. It is noted that the building response can be approximated by translation and rocking of the base only for excitation by long, strong motion waves.

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Section: Appendix a The Model And Finite Difference Formulationmentioning

confidence: 99%

“…We then consider the following cases of nonlinearity, depending upon C (see [18]): ≥ C 2: Small nonlinearity. Permanent strain does not occur until the wave hits the foundation.…”

Section: Appendix B Energy and Strainsmentioning

confidence: 99%

Section: Appendix B Energy and Strainsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two-dimensional translation, rocking, and waves in a building during soil-structure interaction excited by a plane earthquake SV-wave pulse

Gičev

Trifunac

Orbović

2016

Soil Dynamics and Earthquake Engineering

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High‐frequency decay of Fourier spectra of strong motion acceleration and nonlinear site response

Gičev¹,

Trifunac

2022

Earthquake Engineering and Resilience

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We examine how the decay of high‐frequency amplitudes of Fourier spectra of strong earthquake ground acceleration (described in seismological literature by the slope parameter κ $\kappa $) depends on the soil and geological site conditions at the recording stations in the Los Angeles metropolitan area. Then, we introduce a Gedanken numerical experiment, in which we analyze nonlinear wave motion in shallow soil and show that it also leads to similar decay of the high‐frequency spectral amplitudes. The results of both of our studies are consistent with the interpretation that the decay of high‐frequency Fourier spectra of strong motion acceleration, described by κ $\kappa $, occurs at the recording site near the ground surface.

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Effects of soil on the energy response of equipment–structure systems with different connection types between the equipment and structure

Jiang

Luo

2020

Structural Design Tall Build

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SummaryIn equipment–structure systems, the soil–structure interaction and connection types between the equipment and structure significantly affect the seismic response. To understand this effect, in this study, the motion equation of an equipment–structure–soil system was derived, and energy balance equations for each part of the coupled system were obtained. Further, the effects of the soil on the energy response were analyzed based on the results of shaking table tests of an equipment–structure system and real‐time substructure shaking table tests of equipment–structure–soil systems with different connection types. The energy response of the equipment–structure system with a rigid ground was compared with that of the equipment–structure–soil systems. The analysis results showed that the energy response of the equipment–structure–soil system with different connections was quite different from that of the system with a rigid ground. The soil decreased the total energy input to the equipment and structure and significantly changed the time distribution characteristics of the input energy. Additionally, the soil weakened the energy consumption of the connections. Therefore, the influence of the soil should be considered in the design of equipment–structure systems with connections.

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Energy dissipation by nonlinear soil strains during soil–structure interaction excited by SH pulse

Cited by 20 publications

References 41 publications

Two-dimensional translation, rocking, and waves in a building during soil-structure interaction excited by a plane earthquake SV-wave pulse

Two-dimensional translation, rocking, and waves in a building during soil-structure interaction excited by a plane earthquake SV-wave pulse

High‐frequency decay of Fourier spectra of strong motion acceleration and nonlinear site response

Effects of soil on the energy response of equipment–structure systems with different connection types between the equipment and structure

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