FINITE ELEMENT MODELLING OF SOIL-STRUCTURE INTERACTION

2015 ◽  
Vol 76 (8) ◽  
Author(s):  
Thevaneyan K. David ◽  
Renga Rao Krishnamoorthy ◽  
Mohamed Jais I. B.
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Background Information ◽  
Structural Behaviour ◽  
Structural Element ◽  
Element Analysis ◽  
Soil Medium ◽  
Structure Interaction

This paper presents background information relevant to the modelling of soil-structure interaction. The interaction between the structural element (i.e. pile foundation or abutments) and the soil medium is believed to have the potential to alter considerably the actual behaviour of any structure. Modelling of the structural element is rather simple and straightforward when compared to modelling the structure in interaction with soil. It is known that the structural analysis simplifies soil behaviour, while geotechnical analysis simplifies structural behaviour. The choice of an appropriate soil constitutive model may have significant influence on the accuracy of soil-structure interaction analyses. A 2D finite element analysis on a pile-cap-pile-soil model replicating actual field work was performed in this paper using OASYS SAFE to further substantiate the choice of an appropriate soil constitutive model for the purpose of soil-structure interaction modelling.

scholarly journals Seismic damage assessment of a historical masonry minaret considering soil-structure interaction

2021 ◽  
Vol 4 (3) ◽  
pp. 196-212
Author(s):  
Taha Yasin Altıok ◽  
Ali Demir
Keyword(s):  
Finite Element ◽  
Interaction Effect ◽  
Soil Structure ◽  
Soft Soil ◽  
Soil Structure Interaction ◽  
Structural Behaviour ◽  
Damage Distribution ◽  
Soil Medium ◽  
Structure Interaction ◽  
Historical Masonry

Historical structures should be carefully preserved and transferred to the next generations. Therefore, their seismic performances should be investigated in detail. In the finite element method, many parameters affect the seismic behaviour and damage distribution in the structures. One of the most significant parameters is the Soil-Structure Interaction effect. In finite element analyses, the soil medium is generally neglected, and the structures' base is restrained by fixed supports. In this study, seismic response of a historical masonry minaret is investigated by considering the Soil-Structure Interaction and Operational Modal Analysis methods. To determine the effect of Soil-Structure Interaction on structural behaviour, the fixed supports, hard and soft soil mediums at the base of the structure are modelled. The material and failure behaviours are defined with the Concrete Damage Plasticity model. Displacements, principal stresses, damage rates, and damage distribution of models are obtained with nonlinear time history analyses. According to the results, the interstory drift increases due to the decrease in the stiffness of the soil media. In addition, the fixed supports model was damaged more tensile stress damage than the other models. The least occurred in the soft soil model. It is concluded that the Soil-Structure Interaction effect significantly affects structural behaviour, especially the damage rate and distribution.

Computer Simulation of the Shaking Table Tests on Harder Soil-Structure Interaction System

2011 ◽  
Vol 261-263 ◽  
pp. 1619-1624
Author(s):  
Pei Zhen Li ◽  
Jing Meng ◽  
Peng Zhao ◽  
Xi Lin Lu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Soil Structure ◽  
Shaking Table Test ◽  
Shaking Table ◽  
Soil Structure Interaction ◽  
Shaking Table Tests ◽  
Site Condition ◽  
Element Analysis ◽  
Structure Interaction

Shaking table test on soil-structure interaction system in harder site condition is presented briefly in this paper. Three-dimensional finite element analysis on shaking table test is carried out using ANSYS program. The surface-to-surface contact element is taken into consideration for the nonlinearity of the state of the interface of the soil-pile and an equivalent linear model is used for soil behavior. By comparing the results of the finite element analysis with the data from shaking table tests, the computational model is validated. Based on the calculation results, the paper gives the seismic responses under the consideration of soil-structure interaction in harder site condition, including acceleration response, contact analysis on soil pile interface and so on.

Analysis of Soil-Structure Interaction with Finite Element Method

2007 ◽  
Vol 340-341 ◽  
pp. 1279-1284 ◽  
Author(s):  
Hong Jian Liao ◽  
Jian Liu ◽  
Yan Gang Zhao ◽  
Zheng Hua Xiao
Keyword(s):  
Finite Element ◽  
Soil Structure ◽  
Response Spectrum ◽  
Soil Layer ◽  
Constitutive Relationship ◽  
Soil Structure Interaction ◽  
Element Analysis ◽  
Computer Technique ◽  
Structure Interaction ◽  
Viscous Boundary

Analysis of dynamic behavior of soil-structure interaction (SSI) is a complicated problem due to the complexities of soil behaviors and dynamic analysis. It is difficult to solve SSI with analytical methods. However, numerical methods with highly developed computer technique are efficient. Based on the advanced nonlinear finite element analysis software MSC.Marc, SSI on loess ground is studied. An approach for the application of MSC.Marc in SSI analysis is presented and an example is given. Hyperbolic soil constitutive relationship and viscous boundary conditions are adopted in the soil model. Moreover, contact between the embedded columns and the adjacent soil is considered. Response spectrum analysis of the result is carried out. Some conclusions about the seismic response of soil-structure system under different soil stiffness and different soil-layer thickness conditions are given. A new way of analyzing SSI for loess ground is provided.

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