Soilstructure interaction technical knowledge base. The interplay between foundation uplifting and soil failure of the bearing capacity type is elucidated under static and dynamic conditions. However, despite its significant development, it has hardly impacted the practice. Missouri university of science and technology scholars mine. The desired soil springs were those of low frequencies for the analysis. 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. Handbook integral bridges soilstructure interaction offers a practical tool for design of integral bridges. In addition, the general applicability of lsdyna for this type of study is assessed by comparing the dynamic. A soil structure system of a multistorey structure mounted on soil translation and rocking springs and. Nick is the author or coauthor of over 100 publications covering many aspects of soilstructure interaction ranging from offshore and high speed railway structures to the construction of embankments on very soft clays and the performance of piles in very stiff clays. Pdf dynamic soil structure interaction of structures. Structure soil structure interaction effects are apparent in fig. Therefore, these bridges are considered as frame structures.
Beneficial effect of soilstructure interaction to structural. Pdf dynamic soilstructure interaction for sustainable. Fema 2000 implies that soilstructure interaction may modify the seismic demand on a building. Observed dynamic soilstructure interaction in scale testing of offshore wind turbine foundations s. This interaction is called soilstructure interaction, abbreviated ssi. A simple threedimensional soilstructure interaction ssi model is proposed. Soilstructure interaction using computer and material models covers computer and analytical methods for a number of geotechnical problems. Nanjing institute of architectural engineering, 1984 m. Opensee 2012 practice soil structure interaction duration.
The infinite elements can be integrated in the finite element method codes 1012 adequately, and then dynamic ssi simulations can be obtained. The purpose of this paper is to present the soiltunnelstructure interaction analysis performed for the. Soil structure interaction for building structure see also. Filename, seabc 1 soil structure interaction 25 26 june 2010 blair gohl the structural engineers association of british columbia a technical seminar about modeling soil structure interaction in the analysis of buildings and bridges, and how the design of structures is affected by the incorporation of ssi effects. Examples of soil structure interaction sheetpile walls prestressed anchors diapraghm walls nailing foundation rafts with piles buildingfoundation in all the above problems strong displacementpressure discontinuity may appear. Soilstructure interaction modelling for piles in performance. Structuresoilstructure interaction effects on the dynamic. It introduces the main factors important to the application of computer methods and constitutive. Structuresoilstructure interaction analysis in a highly. Soilstructure interaction for building structures nist. In that model, the layered soil medium is divided into thin layers and each thin layer is represented by a parametric model. Structure soil structure dynamic interaction 102 j. Methodologies for soilstructure interaction analysis.
Task order 10 this report represents an advancement in the state of soil structure interaction ssi knowledge for practicing engineers. Introduction recently, over the period of december 2000 to february 2001, there is an intensive discussion about. The training and testing sets have been developed by using finite element sap2000 package program outcomes. The hyperlinks below, present the concepts and techniques associated with modeling soilstructure interaction. It introduces the main factors important to the application of. Soil structure interaction modelling for piles in performancebased seismic design. Problems associated with practical application of ssi for building structures are rooted in a poor understanding of fundamental ssi principles. Soilstructure interaction modelling for piles in performancebased seismic design. Isbn 02215659 the effect of soilstructure interaction is. Soilstructure interaction ssi analysis evaluates the collective response of three linked systems. Soilstructure interaction for building structures national. Soil structure interaction ssi is a typical civil engineering problem 19. Nick is the author or coauthor of over 100 publications covering many aspects of soil structure interaction ranging from offshore and high speed railway structures to the construction of embankments on very soft clays and the performance of piles in very stiff clays. Dynamic soilstructure interaction, volume 83 1st edition.
It is concluded that soil structure interaction reduces strength reduction factors for soft soils, therefore, using the fixedbase strength reduction factors for interacting systems lead to non. Soil pile interaction single pile pushover clay 0 0 20000 30000 40000. Recent advances in seismic soilstructure interaction. Elasto dynamic soil structure interaction analysis sassi 10 was used to generate soil springs at the centerlines of the tunnels. Soil structure interaction broadly can be divided into two phenomena. Stated conversely, the presence of a stiff structure could possibly affect the response of the ground to earthquake shaking. There are two methods available for modeling the soilstructure interaction ssi.
Dynamic analysis of soil structure interaction effect on multi story rc frame article pdf available in open journal of civil engineering 0804. Based on the above limited literature overview, it seems that importance of full ssi analysis is well established in the research community. Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and. A system for analysis of soilstructure interaction. A soilstructure system of a multistorey structure mounted on soil translation and rocking springs and. Structuresoilstructure interaction effects are apparent in fig.
Soil structure interaction ssi analysis traditional spra in involves the use of linear geometric properties soil and structure are glued together, namely, the soil undergoes tension when structure uplifts, linear soilproperties, and linear structure properties. Filename, seabc 1 soil structure interaction 25 26 june 2010 blair gohl the structural engineers association of british columbia a technical seminar about modeling soilstructure interaction in the analysis of buildings and bridges, and how the design of structures is affected by the incorporation of ssi effects. On seismic soil structure interaction simulations for nuclear power plants. Soil structure interaction arash khosravifar fugro consultants, inc. The main factors that affect the genesis of soil structure are represented by the effect of cations, by the interaction between clay particles under the influence of soil water. Soilstructure interaction in large structures subjected. The report further illustrate the resonance vibration of building and variation in nature of design. The university of british columbia, canada, 1992 a thesis submitted in partial fulfillment of therequirements for degree of doctor of. Soilstructure interaction for building structure see also. He has sat on many uk and international committees and has. Purchase soil structure interaction, volume 43 1st edition. Dynamic soilstructure interaction with three case studies. Furthermore, according to fema 2000 the effects of soilstructure interaction must be evaluated for nearfield and soft soil sites and also for buildings in.
The role of soilstructure interaction ssi in the seismic response of structures is reexplored using recorded motions and theoretical considerations. Observed dynamic soilstructure interaction in scale. One modeling feature useful to soilstructure interaction is the gap compressiononly link object, which enables foundation uplift without the development of tensile forces. Dynamic analysis including ssi effects two different approaches have been adopted in the past to investigate the problem of soilstructure interaction and incorporate the effect of soil compliance in the dynamic analysis. First, a model is developed for a layered soil medium. Schematic illustration of procedures used to combine pushover curves. The change in understanding of the sitespecific seismic. Earthquake wavesoilstructure interaction analysis of. A system for analysis of soilstructure interaction university of california, berkeley. Sep, 2012 soil structure interaction ssi analysis evaluates the collective response of three linked systems. Dynamic analysis of soil structure interaction effect on. Purchase soilstructure interaction, volume 43 1st edition.
Various combinations of soil and structure can either. The vertical and horizontal soil springs are linear elastic, however, the soil tunnelslippage interaction. Soilstructure interaction is an area of major importance in geotechnical engineering and geomechanics advanced geotechnical engineering. Soilstructure interaction ssi analysis evaluates the collective response of three.
Nash7 1 chair of geomechanics, university of surrey 2 lecturer, university of leeds 3 head of civil engineering, rwe innogy 4 senior lecturer, university of. Soil structure interaction and seismic design code provision even though the soil has good engineering characteristics 3. It is hoped that this book contributes to further advance the state of the. Soil behavior is represented with the elastoplastic mohrcoulomb model.
When a structure is subjected to an earthquake excitation, it interacts with the foundation and the soil, and thus changes the motion of the ground. This is especially applicable to areas of seismic activity. It covers soil structure interaction under static and dynamic loads, dynamic behavior of soils, and soil liquefaction. 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. Purchase dynamic soilstructure interaction, volume 83 1st edition. Dynamic soil structure interaction dssi as a topic of research has been under focus for last 40 years or more. Proceedings of the csni workshop on soil structure interaction ssi. System identification analyses are used to evaluate soilstructure interaction. Pile foundations and retaining structures by guoxi wu b. An overview of structuresoilstructure dynamic interaction. The paper compares how different models include soilstructureinteraction into the structural model taking into account the flexibility of the foundation slab as well as the stiffness and radiation damping of the soil. Dynamic soilstructureinteraction analysis of structures. Apr 01, 2014 raft and soil structure interaction oasys software webinar duration.
Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it. Soilstructure interaction in large structures subjected to. Pdf dynamic analysis of soil structure interaction. Dynamic soil structure interaction analysis of structures in dense urban environments by katherine carys jones a dissertation submitted in partial satisfaction of the requirements for the degree of doctor of philosophy in engineering civil and environmental engineering in the graduate division of the university of california, berkeley. Raft and soilstructure interaction oasys software webinar duration. Soil structure interaction and seismic design code provision. The importance of performance based design approaches and soil structure interaction in seismic design of structures are internationally recognized. Keywords spring constant, coefficient of subgrade reaction, plaxis software 1. A simple soilstructure interaction model sciencedirect. These relatively long structure periods and stiff ground conditions combine to yield low. 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. Analytical approaches for soil structure interaction. Observed dynamic soilstructure interaction in scale testing.
Soilstructure interaction effects on seismic behaviour of. Prenticehall international series in civil engineering and engineering mechanics. Genesis of soil structure soil structure is a dynamic property and it is subjected to genesis and degradation processes. In this study, neural networks nn, which have been widely applied to engineering problems, have been applied to soil structure interaction ssi problems. The dynamic effect of the soil structure interaction is clear. Empirical evaluation of inertial soilstructure interaction.
Purpose of this paper is to present a methodology for high. Both studies are performed using the finite element program lsdyna. The paper compares how different models include soil structure interaction into the structural model taking into account the flexibility of the foundation slab as well as the stiffness and radiation damping of the soil. The earthquake wavesoilstructure interaction analysis of tall buildings is the main focus of this research. The soilstructure system is referred to a global x 1 x 2 x 3 coordinate system as shown in the figure, where x 1 x 2 coincides with the top surface of the layer and x 3 axis is directed upwards. Feb 29, 2012 the natural eigen frequency of the soil layer without footing which is 18. Sassi system for analysis of soil structure interaction. 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. Observed dynamic soil structure interaction in scale testing of offshore wind turbine foundations s.
Dynamic soil structure interaction geoslope international. Spra that utilizes nonlinear soilstructure interaction nlssi analysis. The mechanical behavior of structures that are in contact with soil is a ected by the interaction between the soil and the structure. 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. Furthermore, according to fema 2000 the effects of soil structure interaction must be evaluated for nearfield and soft soil sites and also for buildings in. Earthquake ground motion causes soil displacement known as freefield. 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. Nonlinear dynamic soilstructure interaction in earthquake engineering alex nietoferro1, georges devesa1, nicolas greffet1, matthieu caudron2 and didier clouteau3 abstract dynamic soil structure interaction problems are usually solved by a substructuring technique where. Task order 10 this report represents an advancement in the state of soilstructure interaction ssi. Integral bridges are structures without bearings and mechanical expansion joints, whereas the connection between the superstructure and the substructure is usually framed. Inertial soil structure interaction inertia from vibration of structure and. Nonlinear seismic soil structure interaction ssi method for developing nonlinear seismic ssi analysis techniques justin coleman, p. Fema 2000 implies that soil structure interaction may modify the seismic demand on a building. Silo building zurich 118 meter azadi hotel tehran 86 meter mit green building 83 meter prof.
In the modelling of the nn, the back propagation algorithm has been used. Piles in liquefied soils 2d approach uc davis with professor ross boulanger 2. Csi software models soilstructure interaction using a oneparameter winkler soil model. This interaction is called soil structure interaction, abbreviated ssi. Examples of soilstructure interaction sheetpile walls prestressed anchors diapraghm walls nailing foundation rafts with piles buildingfoundation in all the above problems strong displacementpressure discontinuity may appear. Some structures where ssi is especially important are buildings, bridges and oil rigs. Dynamic soilstructure interaction analysis of buildings. The infinite elements as a computational technology are widely used due to the fact that their concepts.