Impedance functions for foundations embedded in a layered medium: An integral equation approach

Apsel, R. J.; Luco, J. Enrique

doi:10.1002/eqe.4290150205

Cited by 169 publications

(56 citation statements)

References 16 publications

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“… Transverse isotropy, anisotropy  Numerical methods, e.g. Karabalis & Beskos (1984), Apsel & Luco (1987), Alarcón & Cano (1989)  Large scale experimentation on SSI effects Still, in the next decade or two, a subset of the best contributions by contemporary researchers in SSI will eventually be duly recognized for their lasting value, at which time they too will be the subject of historical surveys yet to be written. In all likelihood, however, such future reviews will have to focus much more narrowly on specific sub-disciplines, given the significant breadth that the subject of SSI has now attained.…”

Section: Contemporary Eramentioning

confidence: 99%

Early history of soil–structure interaction

Kausel

2010

Soil Dynamics and Earthquake Engineering

317

131

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Soil Structure Interaction is an interdisciplinary field of endeavor which lies at the intersection of soil and structural mechanics, soil and structural dynamics, earthquake engineering, geophysics and geomechanics, material science, computational and numerical methods, and diverse other technical disciplines. Its origins trace back to the late 19 th century, evolved and matured gradually in the ensuing decades and during the first half of the 20 th century, and progressed rapidly in the second half stimulated mainly by the needs of the nuclear power and offshore industries, by the debut of powerful computers and simulation tools such as finite elements, and by the needs for improvements in seismic safety. The pages that follow provide a concise review of some of the leading developments that paved the way for the state of the art as it is known today. Inasmuch as static foundation stiffnesses are also widely used in engineering analyses and code formulas for SSI effects, this work includes a brief survey of such static solutions.

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Section: Contemporary Eramentioning

confidence: 99%

Early history of soil–structure interaction

Kausel

2010

Soil Dynamics and Earthquake Engineering

317

131

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“…The effects of the foundation medium on the structural response are commonly simulated by a series of frequency-dependent springs and dashpots representing a theoretical half-space or a simplifying hypothesis of homogeneous horizontal layers surrounding the base of the structure. The noteworthy research papers that deal with the discrete values of impedance functions over wide ranges of frequency-factors have been presented for both surface-supported and embedded foundations resting on soil strata (Luco and Westmann, 1971;Kausel and Roesset, 1974;Gazetas, 1983;Wong and Luco, 1985;Apsel and Luco, 1987;Ç elebi and Gündüz, 2005;Mylonakis et al, 2006).…”

Section: E ç Elebi Et Al: Non-linear Finite Element Analysis For Prmentioning

confidence: 99%

Non-linear finite element analysis for prediction of seismic response of buildings considering soil-structure interaction

Çelebi

Göktepe

Karahan

2012

Nat. Hazards Earth Syst. Sci.

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Abstract. The objective of this paper focuses primarily on the numerical approach based on two-dimensional (2-D) finite element method for analysis of the seismic response of infinite soil-structure interaction (SSI) system. This study is performed by a series of different scenarios that involved comprehensive parametric analyses including the effects of realistic material properties of the underlying soil on the structural response quantities. Viscous artificial boundaries, simulating the process of wave transmission along the truncated interface of the semi-infinite space, are adopted in the non-linear finite element formulation in the time domain along with Newmark's integration. The slenderness ratio of the superstructure and the local soil conditions as well as the characteristics of input excitations are important parameters for the numerical simulation in this research. The mechanical behavior of the underlying soil medium considered in this prediction model is simulated by an undrained elastoplastic Mohr-Coulomb model under plane-strain conditions. To emphasize the important findings of this type of problems to civil engineers, systematic calculations with different controlling parameters are accomplished to evaluate directly the structural response of the vibrating soil-structure system. When the underlying soil becomes stiffer, the frequency content of the seismic motion has a major role in altering the seismic response. The sudden increase of the dynamic response is more pronounced for resonance case, when the frequency content of the seismic ground motion is close to that of the SSI system. The SSI effects under different seismic inputs are different for all considered soil conditions and structural types.

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“…Forced-vibration tests of foundations were employed by Luco and Wong [64,65] to identify lowstrain stiffness and damping properties of underlying soil strata. The identifications were based on a minimization of differences between theoretical impedance functions [4] and those directly computed using forced-vibration results. Figure 5 exhibits the shear wave velocities of an Imperial Valley (California) site as identified using such a foundation test data, along with velocities estimated using the SASW technique.…”

Section: Spectral Analysis Of Forced-vibration Testsmentioning

confidence: 99%

A survey of geotechnical system identification techniques

Oskay

Zeghal

2011

Soil Dynamics and Earthquake Engineering

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Identification and inverse problem techniques play an important role in the characterization and modeling of geotechnical systems. These techniques have been used in estimation of system parameters, model development and calibration, as well as simulation of earthquake ground motions. The recent availability of high quality seismic records of sites equipped with downhole accelerometer arrays led to a burgeoning of identification and inverse problem studies involving geotechnical systems. This paper presents a survey of system identification techniques and analyses of full-and small-scale soil systems, with an emphasis on geotechnical earthquake engineering problems.

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Impedance functions for foundations embedded in a layered medium: An integral equation approach

Cited by 169 publications

References 16 publications

Early history of soil–structure interaction

Early history of soil–structure interaction

Non-linear finite element analysis for prediction of seismic response of buildings considering soil-structure interaction

A survey of geotechnical system identification techniques

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