Advantages and detriments of 1-Directional 3-Component wave propagation approach for Soil-Structure Interaction modeling

In the present study, a large-scale seismic response analysis of a super-high-rise steel frame considering the soil–structure interaction is conducted. A high-fidelity mesh of a 31-story super-high-rise steel frame and the ground underneath it, which is made completely of hexahedral elements, is generated. The boundary conditions that are consistent with the solution of the one-dimensional (1D) wave propagation analysis are imposed on the side and bottom surfaces of the ground. The waves are assumed to propagate in the vertical direction. The 1D wave propagation analysis is conducted under the excitation of the JR Takatori record of the 1995 Hyogoken-Nanbu earthquake. The parallel large-scale analysis is performed using the K computer, which is one of the fastest supercomputers in the world. The results of the models with and without the ground are compared, which reveals that the results obtained by these two models are very similar because the ground is assumed be sufficiently hard in the present study.

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An improved two-step soil-structure interaction modeling method for dynamical analyses of offshore wind turbines

Applied Ocean Research ◽

10.1016/j.apor.2015.12.001 ◽

2016 ◽

Vol 55 ◽

pp. 141-150 ◽

Cited By ~ 15

Author(s):

Jan Häfele ◽

Clemens Hübler ◽

Cristian Guillermo Gebhardt ◽

Raimund Rolfes

Keyword(s):

Wind Turbines ◽

Soil Structure ◽

Modeling Method ◽

Offshore Wind ◽

Soil Structure Interaction ◽

Offshore Wind Turbines ◽

Structure Interaction ◽

Interaction Modeling

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Soil-fluid-structure interaction applied to the Oued Taht dam (taking into account the membrane effect).

MATEC Web of Conferences ◽

10.1051/matecconf/201814902037 ◽

2018 ◽

Vol 149 ◽

pp. 02037

Author(s):

Krenich Nasreddine ◽

Tahar Berrrabah Amina ◽

Houmadi Youcef ◽

Belharizi Mohamed ◽

Mehdeli Mohamed ◽

...

Keyword(s):

Soil Structure ◽

Fluid Structure Interaction ◽

Arch Dam ◽

Soil Structure Interaction ◽

Constant Thickness ◽

Fluid Structure ◽

Structure Interaction ◽

Membrane Effect ◽

Interaction Modeling ◽

Interaction Phenomenon

The objective of this work is to analyze the dynamic behavior (modal behavior) of the "Oued Taht" arch dam located at MASCARA, taking into consideration the effect of soil-fluid-structure interaction. The finite element code "Ansys" was chosen for the dynamic modeling of the dam that is the subject of this study. Three hypotheses were used for soil-structure interaction modeling; model with embedded base which corresponds to the case where the phenomenon of interactions soil-structure is neglected, model with ground of foundation without mass which consists in taking into account the kinematic component of interaction soil structure and neglecting the inertial component and the model with foundation soil with mass where the two components of soil-structure interaction are taken into account. For the fluid, the model of added masses (equivalent to the westergaard approach) using the SURF element available in the Ansys code library was used. A comparison between the different models of the "Oued Taht" dam was made; it has been found that the taking into account of the soil-fluid-structure interaction phenomenon modifies the period of the system and that the modeling of the dam with and without fluid gives a very important difference of the periods. The results obtained were compared with those of the "Brezina" dam, which is a gravity dam located in BAYADH. The work has shown that the periods of the "Oued Taht" dam with soil-fluid-structure interaction modeling are very out of phase with the periods without fluid modeling (taking into account only the soilstructure interaction phenomenon). which is not the case for the Brezina dam where the periods for the two models are getting closer. The periods between the two models mentioned before are close to the dam of Brézina because the latter is a dam which participates much more by its own weight than by its vault (thickness of the vault varies between 36.3 m at the base and 5m in crest) which is the opposite for the dam "Oued Taht" which participates by its vault (constant thickness of 7 m) thus the membrane effect is present, which is translated by the shift of the periods between the empty case and the filled case.

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