Modeling of soil and structure interaction subsea masters thesis in applied mechanics. The stiffness of both structure and soil has an important role when modelling the interaction. Two three dimensional, finite element fe models of pilesoil interaction have been developed using abaquscae and sap2000 to study the effect of lateral. Special attention is paid to problems of soilstucture interaction, where emphasis is put on the behaviour of the soil rather than on that of structures. Ammar motorwala modelling soilstructure interaction for nonlinear dynamic analysis of framed structures with pile foundation 1 p a g e modelling soilstructure interaction for nonlinear dynamic analysis of framed structures with pile foundation an earthquake is a phenomenon which basically takes place to dissipate the strain energy accumulated. Seismic soilstructure interaction in the time domain. Various combinations of soil and structure can either.
But, whatever type of model is used, the soil is represented only as a load this is not a soilstructure interaction analysis. Numerical and centrifuge modelling in soilstructure. The model is validated by performing i free field soil tests, ii dynamic soil. Soil structure interaction modelling for piles in performancebased seismic design. The effectiveness and efficiency of the hybrid modelling for soilstructure interaction analysis in layered media are demonstrated by simulating the far field using the system identification method and the boundary solution method for different aforementioned soil con ditions.
To the writers knowledge, it is luco and contesse 6 in 1973 to come up first with the structuresoilstructure interaction designation for this area of study. This includes the selection of the soil model, the far field model, the structural model and the soil structure interaction analysis method. In that model, the layered soil medium is divided into thin layers and each thin layer is represented by a parametric model. Soilstructure interaction effects on seismic behaviour of. On the validation of a numerical model for the analysis of. Modelling soil structural interaction during tunnel excavation. One problem with modelling a soilstructure interaction using a full fe analysis of the soil is that it requires a large amount of computational e ort along with a signi cant e ort in building the models, and a rather deep understanding of soil modelling. Fema 2000 implies that soilstructure interaction may modify the seismic demand on a building. The following study however has considered soil structure interaction for piles in general, in order to be able to extend the results into a wider range of future. The importance of performance based design approaches and soil structure interaction in seismic design of structures are internationally recognized. The modelling of the soil as springs comes forth out of the winkler foundation model. The paper is related to the most significant aspects of numerical simulations in seismic analysis of tunnels, highlighting the soilstructure interaction phenomenon. Maugeri department of civil and en vironmen tal engineering, university of catania, italy abstract the present paper deals with a parametric study of soil foundationframe interaction in pseudostatic conditions by means of a new finite element code, named sofia.
Therefore 3d shell element models or mixed element models would probably be more appropriate as in figure 5 below. Oct 27, 2011 the aim of this study is to improve some existing procedures for the finite element analysis of soil deformation and collapse. As is well known, there are two main methods which are being used in the soilstructure interaction ssi analysis, namely, substructure and direct methods. Special attention is paid to problems of soil stucture interaction, where emphasis is put on the behaviour of the soil rather than on that of structures. The following study however has considered soilstructure interaction for piles in general, in order to be able to extend the results into a wider range of future.
The modelling of a problem and analysis of relevant influences may be completed by an application of software packages based on the finite element method. The algorithms presented are geared for use on mini and personal computers and can be used in any numerical method. Pdf numerical and physical simulations of soilstructure. Overview of soilstructure interaction principles jonathan p. This is especially applicable to areas of seismic activity. Modelling of soilstructure interaction vladimir kolar and. Integral bridges and the modelling of soilstructure. Numerical analysis of soilstructure interaction plaxis. Numerical modelling in seismic analysis of tunnels regarding soilstructure interaction 253 under the assumption of twolayered formation semiinfinite elastic or elastoplastic space, the influence of the ground surface is considered. Modeling of soil and structure interaction subsea masters thesis in applied mechanics nicholas stromblad department of applied mechanics division of material and computational mechanics chalmers university of technology abstract the mechanical behavior of structures that are in contact with soil is a ected by the interaction between the soil. Numerical and physical simulations of soilstructure interaction.
Physical and numerical modeling of seismic soilstructure. Modelling of soilstructure interaction, volume 58 1st. However, the foundation embedded into the soil will not follow the free field motion. Methods for numerical analysis of soilstructure interaction. Numerical analysis of nonlinear soilstructure interaction m. Soilfoundationstructure interaction contains selected papers presented at the international workshop on soilfoundationstructure interaction held in auckland, new zealand from 2627 november 2009. From the designers point of view, the model considerably reduces the extent of the calculations connected with the numerical analysis of soil structure interaction.
Also it is known that, due to unbounded nature of soil medium, the computational size of these methods is very large. Seismic soil structure interaction was found to have an important effect on structure response by increasing the amplification of foundation input motion. This book describes how a number of different methods of analysis. Awruch on the validation of a numerical model for the analysis of soil structure interaction problems latin american journal of solids and structures 2016 15451575 1 introduction the soil structure interaction in general has been a concern and there is a need to further under. Maugeri department of civil and en vironmen tal engineering, university of catania, italy abstract the present paper deals with a parametric study of soilfoundationframe interaction in pseudostatic conditions by means of a new finite element code, named sofia. The following information details specific capabilities of lusas for soil structure interaction modelling. This model has some drawbacks which are improved by the pasternak foundation model. An analysis of the composite pilesoil system was performed using the finite difference fd software lpile.
Awruch on the validation of a numerical model for the analysis of soilstructure interaction problems latin american journal of solids and structures 2016 15451575 1 introduction the soilstructure interaction in general has been a concern and there is a. Numerical analysis of pilesoil interaction under axial and. Soilstructure interaction effects, analysis and applications in design the study of soilstructure interaction ssi is related to the field of earthquake engineering. The second part deals with the physical modelling using centrifuge. Soil structure interaction effects are calculated from the responses, and a comparison is made between the numerical results and experimental observations. To the writers knowledge, it is luco and contesse 6 in 1973 to come up first with the structuresoilstructure. This study describes the implementation of linear numerical analysis model which incorporates the soil. Numerical integration was conducted using the integration method of newmarks. Numerical analysis of nonlinear soilstructure interaction.
A time domain analysis procedure and method for seismic soilstructure interaction analysis are introduced in this work. The bounding surface plasticity model is implemented to model the near field. This book describes how a number of different methods of analysis and modelling, including the boundary element method, the finite element method, and a range of classical methods, are used to answer some of the questions associated with soilstructure interaction. Numerical and centrifuge modelling in soilstructure interaction. Soil structure interaction broadly can be divided into two phenomena. Modeling the interface article pdf available in canadian geotechnical journal 393. The aim of this study is to improve some existing procedures for the finite element analysis of soil deformation and collapse. One problem with modelling a soil structure interaction using a full fe analysis of the soil is that it requires a large amount of computational effort along with a significant effort in building the models, and a rather deep understanding of soil modelling. Numerical analysis and modelling crc press book this book describes how a number of different methods of analysis and modelling, including the boundary element method, the finite element method, and a range of classical methods, are used to answer some of the questions associated with soil structure interaction. One problem with modelling a soilstructure interaction using a full feanalysis of the soil is that it requires a large amount of computational e ort along with a signi cant e ort in building the models, and a rather deep understanding of soil modelling. Full modeling of soil, foundation, structure propagate waves through system.
The free field experiments show that the simulated earthquake, which is generated by the hammer. Numerical analysis and modelling this book describes how a number of different methods of analysis and modelling, including the boundary element method, the finite element method, and a range of classical methods, are used to answer some of the. Introduction structure foundation underlying soilrock response dictated by interactions between. It is primarily an exchange of mutual stress, whereby the movement of the groundstructure system is influenced by both the type of ground and the type of structure. Soil foundation structure interaction contains selected papers presented at the international workshop on soil foundation structure interaction held in auckland, new zealand from 2627 november 2009. Soilstructure interaction modelling for piles in performance. Analytical method, modeling and boundary condition for the response analysis with nonlinear soilstructure interaction kunihiko uno 1, hiroo shiojiri 2, kazuhiro kawaguchi 3. Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it.
This seminar focused on numerical modelling of the complex interaction between soil and structure during tunnel excavation. This includes the selection of the soil model, the far field model, the structural model and the soilstructure interaction analysis method. Follow the links provided to stream and download media content. This paper presents background information relevant to the modelling of soilstructure interaction. The complicated soilstructure interaction presents a major uncertainty for integral bridges. The steps taken in modelling the response of each involved material and interaction details are summarized.
In this paper applications of the numerical methods to problems of soil structure interaction are first dealt with. One problem with modelling a soilstructure interaction using a full feanalysis of the soil is that it requires a large amount of computational effort along with a significant effort in building the models, and a rather deep understanding of soil modelling. Numerical analysis of nonlinear soil structure interaction m. Numerical analysis of pilesoil interaction under axial.
A simple soilstructure interaction model sciencedirect. The complicated soil structure interaction presents a major uncertainty for integral bridges. Furthermore, according to fema 2000 the effects of soilstructure interaction must be evaluated for nearfield and soft soil sites and also for buildings in. They thus indirectly confirm the satisfactory performance of the adopted numerical approach, which takes into account a unique model of the soil, the tunnel and the building that is, the key ingredients of this interaction problem.
Earthquake ground motion causes soil displacement known as freefield motion. This book describes how a number of different methods of analysis and modelling, including the boundary element method, the finite element method, and a range of classical methods, are used to answer some of the questions associated with soil structure interaction. The workshop was the venue for an international exchange of ideas, disseminating information about experiments, numerical models and practical en. Modelling the interaction between structure and soil for. Effects on displacementbased pushover analysis initial seismic demand freefield. A time domain analysis procedure and method for seismic soil structure interaction analysis are introduced in this work. Laboratory tests and correlations from field tests have been developed to quantify this parameter and these can be used to select an appropriate k0 value for input in the soilstructure interaction analysis.
First, a model is developed for a layered soil medium. Plaxis as a tool for soilstructure interaction modelling in. Structuresoilstructure interaction sssi, put forward in recent decades, means the dynamic interaction problem among the multistructure system through soilground. In this paper, the analysis of a numerical study of pilesoil interaction subjected to axial and lateral loads is presented. A 3d finite difference numerical model was also developed to simulate the response of centrifuge model tests and study the parameters that affect the characteristics of earthquake at the base. One problem with modelling a soil structure interaction using a full fe analysis of the soil is that it requires a large amount of computational e ort along with a signi cant e ort in building the models, and a rather deep understanding of soil modelling. The chapter continues by describing the interaction between structure and soil. A simple threedimensional soilstructure interaction ssi model is proposed. Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and. From the designers point of view, the model considerably reduces the extent of the calculations connected with the numerical analysis of soilstructure interaction. The following information details specific capabilities of lusas for soilstructure interaction modelling. All facilities are based on the trusted and proven general capability of the lusas finite element system. In this paper applications of the numerical methods to problems of soilstructure interaction are first dealt with. This is a major talking point currently, with over 26 miles of tunnels being built under the uks capital city as part of crossrail and numerous.
This interaction is called soilstructure interaction, abbreviated ssi. Seismic soilstructure interaction was found to have an important effect on structure response by increasing the amplification of foundation input motion. Numerical analysis and modelling crc press book this book describes how a number of different methods of analysis and modelling, including the boundary element method, the finite element method, and a range of classical methods, are used to answer some of the questions associated with soilstructure interaction. Soilstructure interaction effects are calculated from the responses, and a comparison is made between the numerical results and experimental observations. Modelling of soilstructure interaction, volume 58 1st edition. Soilstructure interaction modelling for piles in performancebased seismic design. Laboratory tests and correlations from field tests have been developed to quantify this parameter and these can be used to select an appropriate k0 value for input in the soil structure interaction analysis.