Foundation Impedance Functions: Theory Versus Experiment

Crouse, C. B.; Hushmand, B.; Luco, J. Enrique; Wong, H. L.

doi:10.1061/(asce)0733-9410(1990)116:3(432)

Cited by 37 publications

(15 citation statements)

References 19 publications

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“…Testing by Crouse et al (1990) was performed on foundation pads for typical accelerograph installations. Tested foundations were ~ 1.2m square concrete pads with and without corner piers.…”

Section: Soil-structure Interaction Research Opportunties Previous Tementioning

confidence: 99%

Field Testing Capabilities of the NEES@UCLA Equipment Site for Soil-Structure Interaction Applications

Stewart¹,

Whang²,

Wallace³

et al. 2005

Earthquake Engineering and Soil Dynamics

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The nees@UCLA field testing has equipment for field testing and monitoring of structural and geotechnical performance. The equipment includes shakers for exciting structural and/or foundation systems, numerous sensors for monitoring accelerations and deformations within the excited structure (e.g., accelerometers, displacement transducers, strain gauges), and real time data acquisition and dissemination capabilities. A key application area for this equipment is testing of soil-foundation-structure systems. Such testing can, for example, be used to evaluate the stiffness and damping associated with foundation-soil interaction.Existing test data for such phenomena is limited, hence there is a significant need for this type of research. The results would enable the verification and calibration of computational and design models used in practice.

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“…Testing by Crouse et al (1990) was performed on foundation pads for typical accelerograph installations. Tested foundations were ~ 1.2m square concrete pads with and without corner piers.…”

Section: Soil-structure Interaction Research Opportunties Previous Tementioning

confidence: 99%

Field Testing Capabilities of the NEES@UCLA Equipment Site for Soil-Structure Interaction Applications

Stewart¹,

Whang²,

Wallace³

et al. 2005

Earthquake Engineering and Soil Dynamics

View full text Add to dashboard Cite

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“…The experimental determination of these functions has also been a difficult task (Crouse et al, 1990).…”

Section: Modal Analysismentioning

confidence: 99%

Estimating soil parameters important for lifeline siting using system identification techniques

Glaser¹

1993

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“…In a number of experimental field studies for both surface and embedded foundations for instance, significant discrepancies between theory and experiment were found in both response magnitude and resonance frequencies in vertical against lateral motions (e.g. Fry 1963;Novak & Beredugo, 1972;Stokoe & Richart, 1974;Wong et al, 1977;Lin & Jennings, 1984;Crouse & Hushmand 1989;Crouse et al 1990;Gazetas & Stokoe, 1991) even under special uniform conditions (e.g. Erden, 1974).…”

Section: Introductionmentioning

confidence: 99%

Physical characteristics of dynamic vertical–horizontal-rocking response of surface foundations on cohesionless soils

Pak¹,

Ashlock²,

Kurahashi³

et al. 2011

Géotechnique

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A fundamental experimental research programme on the dynamic behaviour of surface foundations on sand in general planar motion and the use of centrifuge modelling in soil-structure interaction studies is presented. Pursued with the dual purpose of extending the conventional formulation of dynamic test programmes as well as generating a physical database with sufficient parametric variations of the key aspects, an extensive experimental study to explore the dynamic soil-structure interaction problem in the small-amplitude regime is described. Through a comparison of the generated data with those from sequential vertical-centric and horizontal load tests, a novel hybrid-mode test concept by way of eccentric excitations is substantiated in terms of its economy and efficiency in capturing the force-response characteristics of the system. Synthesised in the frequency domain for direct qualitative and quantitative insights, multiple forced-response records of the foundation models on sand subjected to random vertical, horizontal and rocking excitations are summarised. As an illustration of the engineering relevance of the experimental database, a critical evaluation of the commonly used homogeneous half-space dynamic foundation solution pertaining to cohesionless soils is also provided.La présente communication décrit un programme fondamental de recherche expérimentale sur le comportement dynamique des fondations de surface sur le sable, dans un mouvement planaire général, ainsi que l'emploi d'une modélisation centrifuge dans des études d'interaction sol /structure. On y trouve également la description d'une étude expérimentale de grande envergure pour l'exploration du problème de l'interaction dynamique sol /structure, dans le régime à faible amplitude, effectuée dans le double but de l'extension des formules conventionnelles des programmes d'essai dynamiques et de la réalisation d'une base de données physique, présentant un nombre suffisant de variations paramétriques des principaux aspects. Par le biais d'une comparaison entre les données produites et des données découlant d'essais séquentiels de charges verticales centriques et horizontales, on justifie un nouveau concept d'essai en mode hybride, à travers des excitations excentriques, sur le plan des propriétés économiques et efficaces dont il fait preuve pour la saisie des caractéristiques force /réaction du système. Sont résumés ensuite de multiples relevés force /réaction sur des maquettes des fondations soumises à des excitations verticales, horizontales et basculantes aléatoires, synthétisés dans le domaine de la fréquence en ce qui concerne des connaissances qualitatives et quantitatives directes. A titre d'illustration de la pertinence technique de la base de données expérimentale, une évaluation critique de la solution répandue de fondations dynamiques demi-espace homogènes, portant sur des sols sans cohésion, est également fournie.

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Foundation Impedance Functions: Theory Versus Experiment

Cited by 37 publications

References 19 publications

Field Testing Capabilities of the NEES@UCLA Equipment Site for Soil-Structure Interaction Applications

Field Testing Capabilities of the NEES@UCLA Equipment Site for Soil-Structure Interaction Applications

Estimating soil parameters important for lifeline siting using system identification techniques

Physical characteristics of dynamic vertical–horizontal-rocking response of surface foundations on cohesionless soils

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