Both inertial and kinematic soilstructure interaction ssi effects can contribute to the response of a structure resting on a compliant geologic medium. Soilstructure interaction effects on seismic response of a. Seismic soilstructure interaction analysis of ventilation stack. Soil structurethe spatial arrangement of individual particles, their aggregates, and of poresplays a multifaceted key role in the factors. Pdf the paper analyses the effect of soilstructureinteraction ssi on the modal dynamic. Theoretical manual, civil engineering department, university of. Such ongoing interactions cause a substantial change in the response of both the structure and the soil. Soilstructure interaction for building structures nehrp. Soilstructure interaction civil engineering ce notes. Soilstructure interaction, earthquake engineering, halil sezen, intechopen, doi. The change in understanding of the sitespecific seismic. Part of thegeotechnical engineering commons, and thestructural engineering commons.
The first objective is to investigate soil structure interaction ssi and how it has affected the responses of the bridges and especially the input motions to the bridges. The response of midrise concrete frame structures to a seismic excitation is related to the dynamic interaction between the structure, foundation and soil called soil structure interaction ssi. Analytical approaches for soil structure interaction. Help us write another book on this subject and reach those readers. Task order 10 this report represents an advancement in the state of soilstructure interaction ssi knowledge for practicing engineers. Spra that utilizes nonlinear soilstructure interaction nlssi analysis.
Probabilistic analysis of offshore wind turbine soil structure interaction wystan carswell university of massachusetts amherst follow this and additional works at. Plaxis as a tool for soilstructure interaction modelling in. Soil structure interaction and seismic design code provision. Journal of earthquake engineering seismic soilstructure. Soilstructure interaction effects on seismic behaviour of. The starting point for this work was decades of available soil structure interaction research, and recently published engineering guidance for static analysis procedures. Soil structure interaction analysis is often preceded by siteresponse analysis, in order to calculate the foundation input ground motion. Soilstructure interaction analysis of rc frame shear wall. Indian institute of technology, kanpur 1 module 4 ground response analysis lectures 17 to 22 lecture 22 topics 4.
Dynamic analysis including ssi effects two different approaches have been adopted in the past to investigate the problem of soil structure interaction and incorporate the effect of soil compliance in the dynamic analysis. Simple methods of analysis are developed for computing the dynamic steady. The importance of soil structure interaction in seismic design of structures is recognized by the seismic design community, which is very much moving towards performance based design principles. Missouri university of science and technology scholars mine. Particularly for structures with deep foundations in soft soil conditions, soilstructure interaction is a key factor that has to be considered in design. When the ground motion, amplified by the site soil in the manner described above, strikes the foundation, two forms of ssi take place. To establish a firm base for the classification of the methods, the objective and the significant features of soil structure interaction analysis described in the two text books 33, 38 are summarized in the following. 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. It introduces the main factors important to the application of computer methods and. The term freefield refers to motions that are not affected. It introduces the main factors important to the application of computer. Part of the cism international centre for mechanical sciences book series cism. The development of design ground motions incorporating soil structure interaction effects and the assessment of fault rupture induced deformations on both the foundation and the superstructure are discussed. Effects of dynamic soilstructure interaction on inelastic.
The terms soilstructure interaction ssi and soilfoundationstructure interaction sfsi are both used to describe this effect 6. The first is attributed to the difference in rigidity between the founda. Soil structure interaction for building structure see also. Soilstructure interaction effects on elastic and inelastic. Soilstructure interaction analysis of pile foundations. 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. To establish a firm base for the classification of the methods, the objective and the significant features of soilstructureinteraction analysis described in the two text books 33, 38 are summarized in the following. The spatial variation of soil structure on farmers fields finke, 1992, 1993 and in catenary sequences in the landscape extends the scale to kilometers. The interaction amid the structure, foundation and soil medium beneath the foundation vary the real seismic behavior of the structure considerably as found by the consideration of the structure alone. Soilstructure interaction using computer and material models covers computer and analytical methods for a number of geotechnical problems. The starting point for this work was decades of available soilstructure interaction research, and recently published engineering guidance for static analysis procedures. With the advent of powerful computers, ssi analysis capabilities have increased by leaps and bounds.
Recent advances in seismic soilstructure interaction. Effect of soilstructure interaction on seismic performance. We also found that the hvsr technique is equally useful for detecting structural damage by determining the. Inertial soil structure interaction inertia from vibration of structure and foundation. The process in which independent response of the soil and structure influences each other is referred to as soil structure interaction ssi. Purchase soil structure interaction, volume 43 1st edition. It provides a synthesis of the body of ssi literature, distilled into a concise narrative, and harmonized under a consistent.
Soil structure interaction at a finite distance from a structure, the absolute displacements must approach the freefield displacements 16. Soil structure interaction, earthquake, ductility, inelastic response, seismic regulations, bridge. Soilstructure interaction effects on seismic response of. Soilstructure interaction is an area of major importance in geotechnical engineering and geomechanics advanced geotechnical engineering. Herein, to include the soil structure interaction effect, spring and dashpot coefficients for circular rigid footing by gazetas 32 have been used.
It introduces the main factors important to the application of. Soil structure interaction ssi knowledge and effect on the seismic assessment of npps structures and components comparison of maximum accelerations soil analysis case 2sn4um location elev. The functioning of soil depends upon a complex interaction between organisms large and small, chemical reactions in solution and on surfaces of clay particles, within a structure determined by natural processes and modified by soil management. Purchase soilstructure interaction, volume 43 1st edition. The study of soil structure ranges from the effects of particle interaction at a scale of nanometers quirk, 1994 to the functioning of soil structure profiles at a scale of meters miedema et al. Nanjing institute of architectural engineering, 1984 m. The effects of ssi are demonstrated by comparing the acceleration spectra of the free field motions with the spectra of the bridge motions recorded at the foundation level. The soil structure interaction evaluations performed for two major long span bridges in turkey are presented.
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. Soilstructure interaction analysis is often preceded by siteresponse analysis, in order to calculate the foundation input ground motion. Binormalization of the response spectra has also been used to characterize the effects of soilstructure interaction e. Based on the analysis results, it has been concluded that the effect of soil structure interaction plays a significant role to increase the time period, bending moment in xx direction, bending. Usually in the seismic design of ordinary building, soil structure interaction is. The process in which the response of the soil influences the motion of the structure and the motion of the structure influences the response of the soil is termed as ssi. The development of design ground motions incorporating soilstructure interaction effects and the assessment of fault rupture induced deformations on both the foundation and the superstructure are discussed. Soilstructure interaction, dynamic behavior of soil, seismic design, damping, vibration period. A new frequency domain method for evaluating the earthquake input energy to a structurepile system or a superstructure alone subjected to horizontal ground motion. The terms soil structure interaction ssi and soil foundation structure interaction sfsi are both used to describe this effect 6. Soilstructure interaction ssi analysis evaluates the collective response of three. Evaluation of soil structure interaction effects for two. Sassi system for analysis of soil structure interaction. View soil structure interaction research papers on academia.
The role of soilstructure interaction ssi in the seismic response of structures is reexplored using recorded motions and theoretical considerations. Keywords soilstructure interaction laterally loaded pile finite element analysis introduction the pile foundations are adopted to transfer the load from the structure to soil when the structure is embedded in a weak. Task order 10 this report represents an advancement in the state of soil structure interaction ssi knowledge for practicing engineers. Because of the limitations of testing facilities and techniques, the seismic performance of soilstructure interaction ssi system can only be tested in a quite small scale model in laboratory. Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and. Pile foundations and retaining structures by guoxi wu b.
Published papers soilstructure interaction in performance. To evaluate the abovementioned effects, a series of experiments are reported in this article. George gazetas george mylonakis national technical university city university of new york athens, greece new york, nyusa1003 i abstract. The university of british columbia, canada, 1992 a thesis submitted in partial fulfillment of therequirements for degree of doctor of. Plaxis as a tool for soilstructure interaction modelling. A broad range of appropriate indicators of soil health are therefore. Effects of soilstructure interaction on the seismic. Soil structure interaction ssi analysis has been recognized to be an essential step in the design of important structures.
The report further illustrate the resonance vibration of building and variation in nature of design. Current practice of siteresponse and ssi analysis in the u. Pdf soilstructure interaction on the dynamic response of bridge. This article presents recent research on dynamic ssi analysis of pilesupported structures using direct.
Based on the analysis results, it has been concluded that the effect of soilstructure interaction plays a significant role to increase the time period, bending moment in xx direction, bending. Soil structure interaction and seismic design code provision even though the soil has good engineering characteristics 3. Thus, once the presence of the building natural frequency is identi. Technical paper soilstructure institution of civil. 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 scale effect resulting from the small scale model is always. Structure, soilstructure response and effects of damage. Particularly for structures with deep foundations in soft soil conditions, soil structure interaction is a key factor that has to be considered in design. A semiinfinite cone model has been used to evaluate base soil characteristics of buildings. The process in which independent response of the soil and structure influences each other is referred to as soilstructure interaction ssi.
The problem of soilpilefoundationsuperstructure interaction is. Ammar motorwala modelling soil structure interaction for nonlinear dynamic analysis of framed structures with pile foundation 1 p a g e modelling soil structure 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 over time at. Especially for longspan bridge, a smaller tested model is required when ssi phenomenon is considered in the physical test. Page 1 nptel geotechnical earthquake engineering dept. Structuresoilstructure interaction sssi, put forward in recent decades, means the dynamic interaction problem among the multistructure system through soilground. However during seismic loading the soil undergoes deformations which are imposed to the foundation, the question naturally arises of knowing if the motion in the vicinity of the structure is altered by the presence of the structure and how the structure response is modified by the compliance of the supporting soil. This is especially applicable to areas of seismic activity. Probabilistic analysis of offshore wind turbine soil. Probabilistic analysis of offshore wind turbine soilstructure interaction wystan carswell university of massachusetts amherst follow this and additional works at. Soilstructure interaction civil engineering ce notes edurev. Introduction it is well known that established seismic design methods may involve tenets and practices that are not always accurate. Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it. Soil structure is the physical architecture that arises from the physical arrangement of the pore spaces among closely packed soil particles, including minerals, decaying biomass, and living organisms.
Soilstructure interaction for building structure see also. Effects of soilstructure interaction on the seismic response of base isolated in highrise buildings abstractin this paper, a real 10story base isolated structure, designed according to ibc, 2009 guidelines, is selected as a case study. The purpose of this paper is to present the soiltunnelstructure. Formulas and charts for impedances of surface and embedded. This interaction between the structure and the soil is named soilstructure interaction ssi. Limitations if distributed shear walls, must consider coupling of wall rotations analysis is conservative for. 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. Fundamental soilstructure interaction equations will he formulated and boundary element method will be applied to obtain, for both cases, the stiffnesses as a function of dimensionless variables in the frequency domain. Because of the limitations of testing facilities and techniques, the seismic performance of soil structure interaction ssi system can only be tested in a quite small scale model in laboratory.
Soilstructure interaction, earthquake, ductility, inelastic response, seismic regulations, bridge. Soil dynamics 2001 fourth international conference on recent advances in geotechnical earthquake engineering and soil dynamics 29 mar 2001, 11. Soil structure interaction research papers academia. The scale effect resulting from the small scale model is always coupled with. Kinematic interaction principally affects the frequency content and amplitude of foundation motions relative to freefield motions e.
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