The evaluation of impedance functions in the analysis of foundations vibrations using boundary element method

Çelebi, Erkan; Fırat, Seyhan; Çankaya, İlyas

doi:10.1016/j.amc.2005.04.006

Cited by 22 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several past studies have aimed at quantifying the dynamic stiffness through either numerical/analytical or experimental methods . The former set of studies were limited to simple cases—for example, surface circular foundation resting on a homogeneous half‐space—whereas the latter typically employed centrifuge tests to mimic real‐world conditions, the results of which are usually overshadowed by scale effects.…”

Section: Introductionmentioning

confidence: 99%

Bayesian identification of soil-foundation stiffness of building structures

Shirzad-Ghaleroudkhani

Mahsuli

Ghahari

et al. 2017

Struct Control Health Monit

View full text Add to dashboard Cite

Summary A probabilistic method is presented for identifying the dynamic soil‐foundation stiffnesses of building structures. It is based on model updating of a Timoshenko beam resting on sway and rocking springs, which respectively represent the superstructure and the soil‐foundation system. Unlike those previously employed for this particular problem, the proposed method is a Bayesian one, which accounts for the prevailing uncertainties due to modeling and measurement errors. As such, it yields the probability distribution of the system parameters as opposed to average/deterministic values. In this approach, the joint probability density function of the parameters that control the flexible‐base Timoshenko beam model, together with the fundamental natural frequency and mode shape of the system, forms the prior distribution. Using Bayes' theorem, a posterior distribution is obtained by updating the prior distribution with a sparsely measured mode shape and frequency. The most probable realizations of the system parameters are then determined by maximizing the posterior distribution. For this purpose, first‐ and second‐order derivatives of the objective function are analytically computed via direct differentiation. The proposed method is verified using a synthetic example. Additionally, sensitivity analyses are carried out on both the system parameters and standard deviations of the sources of error. Subsequently, the proposed method is applied to real‐life data recorded at the Millikan Library building, which is located at the California Institute of Technology campus in Pasadena, California, and the results are compared with a previous deterministic study.

show abstract

Section: Introductionmentioning

confidence: 99%

Bayesian identification of soil-foundation stiffness of building structures

Shirzad-Ghaleroudkhani

Mahsuli

Ghahari

et al. 2017

Struct Control Health Monit

View full text Add to dashboard Cite

show abstract

“…[12] studied the dynamic soil-structure interaction effects on the seismic response of building structures with the surface and embedded mat foundations using shake table tests on scaled models. Many authors considered the effect of dynamic soilstructure interaction on the performance of structures [13][14][15][16][17]. These studies have shown that consideration of the SSI effect modifies dynamic characteristics of a structure, including frequencies, damping, mode shapes, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of friction damper on seismic response of structure considering soil-structure interaction

2020

JCE

View full text Add to dashboard Cite

The effect of soil structure interaction (SSI) on a single degree of freedom system with and without friction damper is analysed in the paper. The structure with different mass, stiffness and soil conditions was prepared and analysed for ten different earthquake records. Using the non-linear time history analysis, the structural response of a single degree of freedom structure with varying slip load of friction damper was studied. It was observed that the performance of friction dampers is influenced by soil parameters. Also, it was established that an optimum slip load and stiffness of brace changes with respect to the type of soil. Utjecaj tarnih prigušivača na seizmički odziv konstrukcije s obzirom na međudjelovanje konstrukcije i tlaU ovom se radu analizira utjecaj međudjelovanja konstrukcije i tla (SSI) na sustav s jednim stupnjem slobode, s tarnim prigušivačem i bez njega. Konstrukcija s različitim vrijednostima mase, krutosti i uvjeta tla pripremljena je i analizirana za deset različitih potresa. Na temelju nelinearnog proračuna s vremenskim zapisom, analiziran je odziv konstrukcije s jednim stupnjem slobode pri raznim vrijednostima kliznog opterećenja tarnog prigušivača. Utvrđeno je da parametri tla utječu na ponašanje tarnog prigušivača. Osim toga, uočeno je da se vrijednosti optimalnog kliznog opterećenja i krutosti ukruta mijenjaju ovisno o vrsti tla. Ključne riječi: tarni prigušivač, međudjelovanje tla i konstrukcije, klizno opterećenje Vorherige Mitteilung In dieser Abhandlung wird der Einfluss des Zusammenspiels von Konstruktion und Boden (SSI) auf einen einzelnen Freiheitsgrad analysiert, mit und ohne Reibungsdämpfer. Eine Konstruktion mit unterschiedlichen Werten für Masse, Steifigkeit und Bodenbedingungen wurde vorbereitet und für zehn verschiedene Erdbeben analysiert. Aufgrund der nicht linearen Berechnung mit Zeitprotokoll wurde das Verhalten der Konstruktion mit einem Freiheitswert bei unterschiedlichen Werten der Gleitlast des Reibungsdämpfers analysiert. Festgestellt wurde, dass die Bodenparameter Einfluss auf das Verhalten des Reibungsdämpfers haben. Außerdem wurde festgestellt, dass die Werte der optimalen Gleitlast und der steifen Festigkeit mit der Bodenart variieren. Schlüsselwörter: Reibungsdämpfer, Zusammenspiel von Boden und Konstruktion, Gleitlast-It can be concluded from the objective functions of peak base shear, peak floor displacement, and energy dissipation, that the friction damper does not achieve the expected response when the soil surface becomes softer.

show abstract

“…For this class of problems, many analytical and numerical solutions have been constructed using the framework of classical elastodynamics (e.g. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]). While providing major insights for understanding some fundamental aspects of SSI, these theoretical achievements have also suffered from some perennial skepticisms in regard to their direct practical value because of their variable performance in handling real physical problems.…”

Section: Introductionmentioning

confidence: 99%

A fundamental dual‐zone continuum theory for dynamic soil–structure interaction

Pak

Ashlock

2010

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

A continuum theory for an improved characterization of dynamic soil-structure interaction in the framework of three-dimensional elastodynamics is presented. Effective in demonstrating the importance of integrating free-field and near-field effects under general soil and foundation conditions, a compact twozone delineation of the soil medium is proposed as a quintessential mechanics perspective for this class of problems. Sufficient to deliver a practical resolution of some perennial analytical and experimental conflicts, a fundamental formulation commensurate to a gradated unification of the homogenization approach and any sole free-field inhomogeneous representation is developed and implemented computationally. Specialized to the problem of a rigid circular footing on sand, a nominal set of dynamic contact stress distributions and related impedance functions by the dual-zone theory is included for theoretical and engineering evaluation. Through its comparison with benchmark analytical solutions and relevant physical measurements, the usage of the underlying conceptual platform as an advanced yet practical foundation for general dynamic soil-structure interaction is illustrated.

show abstract

The evaluation of impedance functions in the analysis of foundations vibrations using boundary element method

Cited by 22 publications

References 15 publications

Bayesian identification of soil-foundation stiffness of building structures

Bayesian identification of soil-foundation stiffness of building structures

Effect of friction damper on seismic response of structure considering soil-structure interaction

A fundamental dual‐zone continuum theory for dynamic soil–structure interaction

Contact Info

Product

Resources

About