Comparative nonlinear soil-structure interaction analyses using macro-element and soil-block modelling approaches

Cavalieri, Francesco; Correia, António A.; Pinho, Rui

doi:10.1007/s10518-022-01379-y

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…The frequency-independent approach, advocated by the project's creators and used in all studies in this study, addresses most of Rayleigh damping's restrictions thus significantly boosting processing time. For small-strain dampening, the dynamic response cannot be supplied, regardless frequency-dependent or independent [34].…”

Section: Validation Of the 3d Numerical Simulation Of Soil Blocksmentioning

confidence: 99%

Nonlinear Dynamic Study of Soil and Structural Interference Issues

Abdulwahed¹,

Mohammed²

2023

cea

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The connection of the soil with the building was already extensively studied on the supposition of the soil's basic and structural uniformity. Nonetheless, during intermediate or powerful earthquakes, the maximum shearing stress can readily exceed the elastic modulus of the properties of the soil. When considering soil-structure connection, nonlinear processes may modify soil rigidity at the building's foundation and hence power dispersion into the soil. As a result, disregarding the nonlinear properties of the dynamic soil-structure interface (DSSI) may result in incorrect dynamic loading estimates. The purpose of this research is to incorporate a completely nonlinear parametric framework for soils into a mathematical notation and examine the impact of soil nonlinearity on dynamic soil building interactions. Furthermore, several problems are defined, for instance the impact of restricting strain on the shear strength of the soil, the preliminary static configuration, and interface components at the soil-structure interface, and so on. Throughout this study, a basic absorbing layer approach that relies on a Rayleigh/Caughey dampening concept, which is frequently accessible in current code, was used. Computational Component software is shown as well. The stability criteria of wave dispersion difficulties are investigated, and it is demonstrated that the linear and nonlinear performance vary dramatically when coping with numerical propagation. This research is separated into two sections. In the first section, a soil column is simulated. There is a development of computational and semi-analytical approaches for describing the one-dimensional linear and nonlinear dynamic soil reactions to a predefined movement. Because the linear formula is simpler to comprehend and explain, it is achieved initially. In addition, it is utilized to determine the amount to which nonlinearity affects soil characteristics. In nonlinear assessment, the strain-dependent shear strength and dampening proportion are employed. Such input variables are crucial for completing a ground response assessment. For the formulations of strain-dependent mechanical properties and dampening in this work, hyperbolic soil model-constructed curves are utilized.

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Section: Validation Of the 3d Numerical Simulation Of Soil Blocksmentioning

confidence: 99%

Nonlinear Dynamic Study of Soil and Structural Interference Issues

Abdulwahed¹,

Mohammed²

2023

cea

View full text Add to dashboard Cite

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“…The proposed framework is then applied to a large number of case studies from earthquakes in California. Cavalieri et al (2022) present the verification analyses of a footing macro-element developed by the Authors through comparisons with results from 3D FE nonlinear applications, which are, in turn, verified through cross-checks and cross-modelling with linear-equivalent and fully nonlinear analyses. The macro-element accounts for the soil nonlinear behaviour in the near-field, as well as in the far-field, dynamic impedance, and energy dissipation through radiation damping.…”

mentioning

confidence: 95%