scholarly journals Numerical analysis of shear interaction of an underground structure with soil

2021 ◽  
Vol 2131 (3) ◽  
pp. 032093
Author(s):  
B B Rikhsieva ◽  
B E Khusanov
Keyword(s):  
Soil Structure ◽  
Underground Structure ◽  
Soil Layer ◽  
Complex Interaction ◽  
Soil Structure Interaction ◽  
Contact Boundary ◽  
Structural Failure ◽  
Main Attention ◽  
Structure Interaction ◽  
The Finite Difference Method

Abstract A soil layer behaviour under the shear interaction of an underground structure with soil is studied. Structural failure is considered under conditions of strained soil, and complete cohesion is assumed at the underground structure-soil contact boundary. The Finite Difference Method is used to numerically investigate the process of the structure-soil shear interaction under consideration. The main attention is paid to the adequacy of the conditions of soil-structure interaction, and to the strain state of the near-contact soil layer around the underground structure. The results are plotted and analysed. From the results obtained, the existence of a near-contact soil layer is shown; the use of the condition of complete cohesion is justified considering the structural failure of soil under conditions of complex interaction; the possibility to determine the thickness of the near-contact soil layer and of the layers with the respective degrees of structural failure is shown.

Study of Pushover Analysis on RC Framed Structure with Underground Structure Considering the Effects of Soil Structure Interaction

2020 ◽  
Vol 8 ◽  
pp. 22-29
Author(s):  
Nasala Dongol ◽  
Prachand Man Pradhan ◽  
Suman Manandhar
Keyword(s):  
Soil Structure ◽  
Response Spectrum ◽  
Underground Structure ◽  
Pushover Analysis ◽  
Standard Penetration Test ◽  
Soil Structure Interaction ◽  
Base System ◽  
Building Site ◽  
Structure Interaction ◽  
Fixed Base

This study states that the effects of soil structure interaction on the Reinforced Concrete (RC) framed structures is directly influenced by the soil properties of the site. Here, one preexisting structure is taken for the study. The building is a hospital building with two underground basements. Taking into account the actual soil condition of building site, this study provides idea on the soil structure interaction on the structure The properties of springs are calculated from different standard penetration test (SPT) values, Poisson’s ratio and elasticity of soil along the depth of the soil. Entire soil-foundation-structure system is modelled and analyzed using spring approach. Static analysis, response spectrum analysis and pushover analysis (PA) are done in order to find the variations in natural periods, base shears and deflections of the structures by incorporating soil flexibility as compared to structures with conventional fixed base. Pushover analysis is done to evaluate the performance of the structure when modelled in fixed base and spring base system.

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.

Efficient seismic analysis for nonlinear soil-structure interaction with a thick soil layer

2021 ◽  
Vol 20 (3) ◽  
pp. 553-565
Author(s):  
Gao Zhidong ◽  
Zhao Xu ◽  
Zhao Mi ◽  
Du Xiuli ◽  
Wang Junjie ◽  
...  
Keyword(s):  
Soil Structure ◽  
Seismic Analysis ◽  
Soil Layer ◽  
Soil Structure Interaction ◽  
Structure Interaction

Assessment of Spatial Property Variability of the Subsurface in SSI Studies of the Armenian Nuclear Power Plant

2004 ◽  
Author(s):  
Nicholas Simos ◽  
Paruyr Zadoyan ◽  
Pierre Labbe ◽  
Pierre Sollogoub ◽  
J.-Pierre Touret
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Soil Structure ◽  
Soil Layer ◽  
Soil Structure Interaction ◽  
Foundation Soil ◽  
Element Discretization ◽  
Structure Interaction ◽  
The Impact

This paper addresses issues surrounding soil property variability including uncertainties associated with “best estimate” values and searches for practical ways to assess the impact on the seismic response of a facility, such as a nuclear power plant, resting on it. Specifically, it attempts, using a parametric study, to formulate a probabilistic model that enables the enveloping of uncertainties associated with the soil-structure-interaction component of the seismic problem. The effects of most-likely sources of uncertainty, such as variability of “distinct” soil layer profile and variability of controlling soil properties, are to be addressed by generating a probabilistic profile in which randomization of key parameters that appear to have the most impact on the results of deterministic analyses is implemented. The use of stochastic finite elements and the introduction of correlation functions, in conjunction with finite element discretization of the foundation soil, are explored as means of achieving an enveloped structural response. The on-going evaluation of the Armenian nuclear plant site prompted this study. In order to stress the importance and relevance of the stated goal, the soil-structure-interaction of the nuclear power plant, subject to significant variation of the foundation soil, is examined. The conflicting results of two independent studies of the subsurface provide the basis for the variation range used in this study.

scholarly journals Evaluation of soil-structure interaction for structures subjected to earthquake loading with different types of foundation

2018 ◽  
Vol 162 ◽  
pp. 04026
Author(s):  
Mohammed Elwi ◽  
Bassman Muhammed ◽  
Nada Alhussiny
Keyword(s):  
Soil Structure ◽  
Response Spectrum ◽  
Soil Layer ◽  
Tall Buildings ◽  
Soil Structure Interaction ◽  
Soil Conditions ◽  
Building Frames ◽  
Structure Interaction ◽  
Different Types ◽  
Seismic Forces

However though the structures are supported on soil, most of the designers do not consider the soil structure interaction and its subsequent effect on structure during an earthquake. Different soil properties can affect seismic waves as they pass through a soil layer. When a structure is subjected to an earthquake excitation, it interacts the foundation and soil, and thus changes the motion of the ground. It means that the movement of the whole ground structure system is influenced by type of soil as well as by the type of structure. Tall buildings are supposed to be of engineered construction in sense that they might have been analyzed and designed to meet the provision of relevant codes of practice and building bye-laws. IS 1893: 2002 “Criteria for Earthquake Resistant Design of Structures” gives response spectrum for different types of soil such as hard, medium and soft. An attempt has been made in this paper to study the effect of Soil-structure interaction on multi storeyed buildings with various foundation systems. Also to study the response of buildings subjected to seismic forces with Rigid and Flexible foundations. Multi storeyed buildings with fixed and flexible support subjected to seismic forces were analyzed under different soil conditions like hard, medium and soft. The buildings were analyzed by Response spectrum method using software SAP2000. The response of building frames such as Lateral deflection, Story drift, Base shear, Axial force and Column moment values for all building frames were presented in this paper.

scholarly journals Seismic codes based equivalent nonlinear and stochastic soil structure interaction analysis

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohamed Elhebib Guellil ◽  
Zamila Harichane ◽  
Erkan Çelebi
Keyword(s):  
Shear Modulus ◽  
Soil Structure ◽  
Soil Layer ◽  
Shallow Foundation ◽  
Soil Structure Interaction ◽  
Base Case ◽  
Eurocode 8 ◽  
Seismic Zone ◽  
Seismic Codes ◽  
Structure Interaction

AbstractThe aim of this study is to consider the effects of the variation of shear modulus ratio (G/G0) and damping ratio (ξ) of soil, obtained by a linear iterative method based on the design spectra of seismic codes, the soil environment in terms of uncertainties in shear modulus using Monte Carlo simulations and the foundation damping (ξf) of flexible base for analyses of the Soil-Structure Interaction (SSI) problems. A squat structure with circular shallow foundation resting on a soil layer over a homogeneous half-space is studied by using cone model and considering seismic zone effect on structural response. Firstly, after showing the effects of the correction of G and ξ on impedance functions and the responses of soil-foundation-structure system, a study is carried out to compare these effects to those of the modelling of uncertainties in shear modulus as random variations. Secondly, a comparative analysis on design response spectra and base shear forces was carried out for four seismic codes (Algerian Seismic Rules RPA99-2003, Eurocode 8–2004, International Building Code IBC-2015 and Indian Code IS-1893-2002) considering the three cases of SSI: SSI effects (initial G and ξ), nonlinear SSI (corrected G and ξ) and stochastic SSI (random G with COV = 20%) compared to the fixed base case. Results show that the correction of G and ξ, according to the equivalent nonlinear method in all the cases, leads to a remarkable decrease in peak responses but show a huge amount of reduction in the second study for IBC-2015 and IS-1893-2002 codes compared to the other codes.

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