Three-dimensional frequency-dependent infinite elements for soil–structure interaction

This paper presents three-dimensional (3D) infinite elements for the multi-layered elastodynamics problems. There are three types of elements, namely horizontal, vertical and corner elements. They have been developed using wave functions in function spaces that can simulate real wave problems properly. The elements are extended forms of the axisymmetric infinite elements developed previously. Since these elements can simulate multiple layers and multiple wave numbers, the response of a 3D general structural system considering soil-structure interaction effect can be determined effectively. Numerical analyses are carried out for a rigid massless disk and square footings on the surface of various layer conditions for verification purposes. The calculated results are compared with existing analytical and numerical data and they were found to be in good agreement.

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DYNAMIC INFINITE ELEMENTS FOR SOIL-STRUCTURE INTERACTION ANALYSIS IN A LAYERED SOIL MEDIUM

International Journal of Structural Stability and Dynamics ◽

10.1142/s0219455407002496 ◽

2007 ◽

Vol 07 (04) ◽

pp. 693-713 ◽

Cited By ~ 14

Author(s):

C. B. YUN ◽

S. H. CHANG ◽

C. G. SEO ◽

J. M. KIM

Keyword(s):

Frequency Domain ◽

Time Domain ◽

Soil Structure ◽

Interaction Analysis ◽

Soil Structure Interaction ◽

Shape Functions ◽

Frequency Dependent ◽

Structure Interaction ◽

Infinite Elements ◽

Stiffness Matrices

This paper presents the dynamic infinite element formulations that have been developed for soil-structure interaction analysis both in frequency domain and time domain by the present authors and our colleagues during the past 20 years. Axisymmetric, 2D and 3D layered half-space soil media were considered in the developments. The displacement shape functions of the infinite elements were established using approximate expressions of analytical solutions in frequency domain to represent the characteristics of multiple waves propagating into the unbounded outer domain of the media. The shape functions were determined in terms of the excitation frequency as well as the spatial and material characteristics of the far-field soil region. Thereby the element mass and stiffness matrices are frequency dependent. As for time domain analysis, the shape functions were further simplified to obtain closed-form frequency-dependent mass and stiffness matrices, which can analytically be transformed into time domain terms by the Fourier transform. The proposed infinite elements were verified using benchmark examples, which showed that the present formulations are very effective for the soil-structure interaction analysis either in frequency or in time domain. Example applications to actual soil-structure interaction problems are also given to demonstrate the capability and versatility of the present methodology.

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Seismic Performance of Deeply Embedded Conceptual Advanced Reactors: Three-Dimensional Nonlinear Soil-Structure Interaction Analyses

Nuclear Technology ◽

10.1080/00295450.2020.1843952 ◽

2021 ◽

pp. 1-23

Author(s):

Efe G. Kurt ◽

Robert Spears

Keyword(s):

Seismic Performance ◽

Soil Structure ◽

Three Dimensional ◽

Soil Structure Interaction ◽

Structure Interaction

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Effect of Pile-Soil-Structure Interaction on the Cable-Stayed Bridge in Response to the Earthquake

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.539.731 ◽

2014 ◽

Vol 539 ◽

pp. 731-735 ◽

Cited By ~ 1

Author(s):

Yu Chen

Keyword(s):

Finite Element ◽

Seismic Response ◽

Soil Structure ◽

Response Spectrum ◽

Three Dimensional ◽

Soil Structure Interaction ◽

Structure Interaction ◽

Finite Element Software ◽

Cable Stayed Bridge ◽

Three Dimensional Finite Element

In this thesis, based on the design of a 140+90m span unusual single tower and single cable plane cable-stayed bridge, free vibration characteristics and seismic response are investigated; three dimensional finite element models of a single tower cable-stayed bridge with and without the pile-soil-structure interaction are established respectively by utilizing finite element software MIDAS/CIVIL, seismic response of Response spectrum and Earthquake schedule are analyzed respectively and compared. By the comparison of the data analysis, for small stiffness span cable-stayed bridge, the pile-soil-structure interaction can not be ignored with calculation and analysis of seismic response.

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