Robust partitioned block preconditioners for large-scale geotechnical applications with soil-structure interactions

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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Some geotechnical aspects of the Hyogo-ken Nanbu (Kobe) earthquake of January 17, 1995

Canadian Journal of Civil Engineering ◽

10.1139/l96-888 ◽

1996 ◽

Vol 23 (3) ◽

pp. 778-796 ◽

Cited By ~ 7

Author(s):

W. D. Liam Finn ◽

P. M. Byrne ◽

S. Evans ◽

T. Law

Keyword(s):

Soil Structure ◽

Large Scale ◽

Ground Improvement ◽

Lateral Spreading ◽

Bridge Piers ◽

Soil Conditions ◽

Kobe Earthquake ◽

Port Facilities ◽

Underground Subway Station ◽

Directivity Effects

A geological and seismological framework is provided for understanding the damage to structures resulting from soil conditions. The paper focusses on the large-scale failures of the quay walls in Kobe Port due to liquefaction, and contrasts the performance of structures in improved and unimproved ground. Soil–structure interaction problems such as pile foundations, bridge piers, lifelines, and an underground subway station are also described. These failures have important implications for seismic design in the Fraser Delta in British Columbia, which has the potential for extensive liquefaction during a major earthquake. Key words: ground motions, directivity effects, liquefaction, lateral spreading, seismic settlements, seismic damage, port facilities, ground improvement.

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LARGE SCALE SIMULATION OF WAVE PROPAGATION IN SOILS INTERACTING WITH STRUCTURES USING FEM AND SBFEM

Journal of Computational Acoustics ◽

10.1142/s0218396x11004316 ◽

2011 ◽

Vol 19 (01) ◽

pp. 75-93 ◽

Cited By ~ 10

Author(s):

MARCO SCHAUER ◽

SABINE LANGER ◽

JOSE E. ROMAN ◽

ENRIQUE S. QUINTANA-ORTÍ

Keyword(s):

Wave Propagation ◽

Soil Structure ◽

Large Scale ◽

Dynamical Behavior ◽

Radiation Condition ◽

Numerical Approach ◽

Soil Structure Interaction ◽

Crucial Point ◽

Large Scale Problems ◽

Energy Plants

This paper applies a parallel algorithm for a coupled Finite Element/Scaled Boundary Element (FEM/SBFEM)-approach to study soil-structure-interaction problems. The application code is designed to run on clusters of computers, and it enables the analysis of large-scale problems. A crucial point of the approach is that the SBFEM fulfills the radiation condition. Hence, the hybrid numerical approach is well suited for such problems where wave propagation to infinity in an unbounded domain must be considered. The main focus of the paper is to show the applicability of the numerical implementation on large scale problems. First the coupled FEM/SBFEM approach is validated by comparing the numerical results with a semi-analytical solution for a settlement problem. Then the implemented algorithm is applied to study the dynamical behavior of founded wind energy plants under time dependent loading.

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