A coupled FEM-SBFEM approach for soil-structure-interaction analysis using non-matching meshes at the near-field far-field interface

2019 ◽  
Vol 121 ◽  
pp. 466-479 ◽  
Author(s):  
Marco Schauer ◽  
Gustavo Ríos Rodriguez
Keyword(s):  
Soil Structure ◽  
Interaction Analysis ◽  
Near Field ◽  
Soil Structure Interaction ◽  
Far Field ◽  
Structure Interaction

Auto-Mesh Generation Technique of Near Field Zone for Soil-Structure Interaction Analysis Using Coupled FE-IE Methodology

2013 ◽  
Vol 281 ◽  
pp. 589-592
Author(s):  
Min Jun Nam ◽  
Choon Gyo Seo ◽  
Jonghan Lee ◽  
Chang Gil Lee ◽  
Seung Hee Park
Keyword(s):  
Finite Element ◽  
Mesh Generation ◽  
Soil Structure ◽  
Interaction Analysis ◽  
Near Field ◽  
Soil Structure Interaction ◽  
Field Zone ◽  
Infinite Element ◽  
Structure Interaction ◽  
Generation Technique

This paper presents an auto-mesh generation technique using KIESSI (KAIST Infinite Elements for Soil-Structure Interaction) of near field zone for soil-structure interaction analysis (SSI). The working principle of KIESSI is based on coupled three dimensional finite element-infinite element methodology. Also, KIESSI is based on finite element method (FEM) for structure and near-field soil medium and infinite element method for layered half-space far-field. This study utilizes the auto mesh generation technique of near field zone on KIESSI package. The verification example for the effectiveness of automatically meshing technique may be shown through a compliance analysis of layered surface footing. For application example, seismic response analysis at a typical nuclear power plant is carried out in consideration of SSI. The obtained floor response spectrum results in good agreement as compared with the measured response data and the results from SSI analysis package such as SASSI (A System for Analysis of Soil-Structure Interaction).

DIRECT APPROACH TO SEISMIC SOIL – STRUCTURE–INTERACTION ANALYSIS – BUILDING GROUP CASE

2010 ◽  
Vol 2 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Abdelhacine Gouasmia
Keyword(s):  
Structural Analysis ◽  
Soil Structure ◽  
Interaction Analysis ◽  
Soft Soil ◽  
Near Field ◽  
Soil Layer ◽  
Careful Consideration ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Response Amplification

Nowadays, the new and emerging concept of seismic structural design, the so-called performance-based design, requires careful consideration of all aspects involved in structural analysis. One of the most important aspects of structural analysis is soil-structure interaction (SSI). Such interaction may alter the dynamic characteristics of structures and consequently may be beneficial or detrimental to the performance of structures. In order to observe such effects we study the seismic response of an idealized small city composed of five equally spaced, five storey reinforced concrete buildings anchored in a soft soil layer overlaid by a rock half-space. Our results show predict response amplification of the buildings in the near field in accordance with the results observed in similar cases.

State-of-the-Art Techniques for Seismic Soil-Structure Interaction Analysis of Steel Gravity Structures

2014 ◽  
Author(s):  
Frederick Tajirian ◽  
Mansour Tabatabaie ◽  
Basilio Sumodobila ◽  
Stephen Paulson ◽  
Bill Davies
Keyword(s):  
Soil Structure ◽  
State Of The Art ◽  
Interaction Analysis ◽  
Layered Soil ◽  
Soil Structure Interaction ◽  
Soil System ◽  
Cyclonic Storm ◽  
Structure Interaction ◽  
Analysis Methods ◽  
Moderate Seismicity

The design of steel jacket fixed offshore structures in zones of moderate seismicity is typically governed by Metocean loads. In contrast the steel gravity structure (SGS) presented in this paper, is a heavy and stiff structure. The large mass results in foundation forces from seismic events that may exceed those created by extreme cyclonic storm events. When computing the earthquake response of such structures it is essential to account for soil-structure interaction (SSI) effects. Seismic SSI analysis of the SGS platform was performed using state-of-the-art SSI software, which analyzed a detailed three-dimensional model of the SGS supported on layered soil system. The results of this analysis were then compared with those using industry standard impedance methods whereby the layered soil is replaced by equivalent foundation springs (K) and damping (C). Differences in calculated results resulting from the different ways by which K and C are implemented in different software are presented. The base shear, overturning moment, critical member forces and maximum accelerations were compared for each of the analysis methods. SSI resulted in significant reduction in seismic demands. While it was possible to get reasonable alignment using the different standard industry analysis methods, this was only possible after calibrating the KC foundation model with software that rigorously implements SSI effects. Lessons learned and recommendations for the various methods of analysis are summarized in the paper.

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