Various combinations of soil and structure can either. Dynamic earth pressures myths, realities and practical ways for design. The purpose of this paper is to present the soiltunnelstructure interaction analysis performed for the. Sassi system for analysis of soil structure interaction. Recent advances in seismic soilstructure interaction. 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. 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. Particularly for structures with deep foundations in soft soil conditions, soilstructure interaction is a key factor that has to be considered in design. In addition, the general applicability of lsdyna for this type of study is assessed by comparing the dynamic. Dynamic soilstructureinteraction analysis of structures. This interaction is called soilstructure interaction, abbreviated ssi. Purchase soilstructure interaction, volume 43 1st edition. Observed dynamic soil structure interaction in scale testing of offshore wind turbine foundations s. 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.
Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it. Structuresoilstructure interaction analysis in a highly. Flush a computer program for approximate 3d analysis of. Observed dynamic soilstructure interaction in scale. The importance of performance based design approaches and soil structure interaction in seismic design of structures are internationally recognized. The starting point for this work was decades of available soilstructure interaction research, and recently published engineering guidance for static analysis procedures. Dynamic soilstructure interaction, volume 83 1st edition. Mtrsassi software is a substructuring program that uses the complex frequency response method and finite element technique to solve a wide range of dynamic soilstructure interaction problems. If verified, these results could lead to site and foundationspecific test methods for evaluating kinematic interaction effects. Fema 2000 implies that soilstructure interaction may modify the seismic demand on a building.
Handbook integral bridges soilstructure interaction offers a practical tool for design of integral bridges. Michael james givens 20 i abstract of the dissertation. This volume focuses on the role of soil structure interaction and soil dynamics. Purchase dynamic soilstructure interaction, volume 83 1st edition. Asce 716 provisions soilstructure interaction state of. Dynamic soil structureinteraction geoslope international. Effects of soilstructure interaction on the dynamic. It is hoped that this volume will contribute to further.
Soilstructure dynamic interaction by means of fem bowles, 1996 allows for a complete model of both the superstructure, the foundation system and the sur. 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. A system for analysis of soilstructure interaction university of california, berkeley. Soil structure interaction and seismic design code provision even though the soil has good engineering characteristics 3.
We also found that the hvsr technique is equally useful for detecting structural damage by determining the. One modeling feature useful to soilstructure interaction is the gap compressiononly link object, which enables foundation uplift without the development of tensile forces. Soilstructure interaction assessment of the 23 november. Soilstructure interaction under earthquake loading. Integral bridges are structures without bearings and mechanical expansion joints, whereas the connection between the superstructure and the substructure is usually framed. Page 1 nptel geotechnical earthquake engineering dept. Soilstructure interaction is an area of major importance in geotechnical engineering and geomechanics advanced geotechnical engineering. However, as the ratio of the stiffness of the structure to that of the foundation increases, the superstructure s response interacts through its foundation and the surrounding soil creates additional soil deformations, so that the motion in the vicinity. Dynamic soilstructure interaction is one of the major topics in earthquake engineering and soil dynamics since it is closely related to the safety evaluation of many important engineering projects, such as nuclear power plants, to resist earthquakes.
The university of british columbia, canada, 1992 a thesis submitted in partial fulfillment of therequirements for degree of doctor 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. Soilstructure interaction for building structures nist. Nanjing institute of architectural engineering, 1984 m. Soilstructure interaction plays an important role in the behavior of structure under static or dynamic loading. Effects of soilstructure interaction on the seismic. A dissertation submitted in partial satisfaction of the requirements for the degree of doctor of philosophy in civil engineering.
The change in understanding of the sitespecific seismic. When analysing the seismic behaviour of structures, kinematic and inertial effects associated to soilstructure interaction ssi affect the. Indian institute of technology, kanpur 1 module 4 ground response analysis lectures 17 to 22 lecture 22 topics 4. Soilstructure interaction using computer and material models covers computer and analytical methods for a number of geotechnical problems. Most of the computa tional results refer to a rigid mat foundation. Structuresoilstructure interaction sssi, put forward in recent decades, means the dynamic interaction problem among the multistructure system through soilground. Missouri university of science and technology scholars mine. Soil dynamics and soilstructure interaction for resilient. The purpose of this chapter is to illustrate whether and under which conditions ssi is important and what are its consequences on the dynamic response of the structure. Linearnonlinear analysis of soil structure interaction. Dynamic soilstructure interaction of instrumented buildings and.
Soilstructure interaction ssi analysis evaluates the collective response of three linked systems. Dynamic earth pressure myths, realities and practical. Stated conversely, the presence of a stiff structure could possibly affect the response of the ground to earthquake shaking. Development of analytical techniques in soilstructure interaction. The analysis utilizes soil impedance functions for a structural foundation. Other important documents are the recovery plans named piani di. Dynamic analysis of soil structure interaction effect on. Soilstructure interaction technical knowledge base. The program has been developed specifically for practical applications and has the following characteristics. 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.
Results of the sssi analysis were compared with those from soil structure interaction ssi analysis of the individual buildings, for the following parameters. Effects of soilstructure interaction on the dynamic properties. Pdf influence of frequencydependent soilstructure interaction on. Probabilistic analysis of offshore wind turbine soilstructure interaction a thesis presented by wystan carswell submitted to the graduate school of the university of massachusetts amherst in partial fulfillment of the requirements for the master of science in civil engineering may 2012 civil and environmental engineering.
Dynamic structuresoilstructure interaction between. Dynamic soil structure interaction of instrumented buildings and test structures. 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. Technical paper soilstructure institution of civil.
It introduces the main factors important to the application of computer methods and constitutive models with emphasis. S presentation outline purpose of presentation linear versus nonlinear seismic ssi nonlinear seismic soil structure interaction nlssi studies the nlssi introduction nonlinearity in seismic ssi analysis commercial software elements commercial software nonlinear constitutive models nonlinear seismic ssi damping demonstration of time domain 2d model. 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. Soilstructure interaction civil engineering ce notes.
Soilstructure interaction effects on seismic behaviour of. Dynamic soilstructure interaction civil engineering. 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. 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. Determination of structure soil structure interaction sssi effects, if any between large and more massive process building pb and exhaust fan building efb. Problems associated with practical application of ssi for building structures are rooted in a poor understanding of fundamental ssi principles. October 2012 practical earth pressure analysis select all potential critical interface combinations at the base and sides of the structure on which to determine the minimum base frictional resistance. Soil structure interaction and seismic design code provision. Soilstructure interaction ssi in buildings has been focus of attention for more than thirty years. Structure, soilstructure response and effects of damage. Plaxis as a tool for soilstructure interaction modelling. It discusses case studies as well as physical and numerical models of geostructures. Soil structure interaction under static and dynamic loads, dynamic behavior of soils, and soil liquefaction. It influences the behavior of soil, as well as the response of pile under loading.
Compare base and side frictional resistance to seismic atrest demand. 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. 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. The report further illustrate the resonance vibration of building and variation in nature of design.
Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and. Thus, once the presence of the building natural frequency is identi. The analysis is highly essential for predicting a more accurate structural behavior so as to improve the safety of structures under extreme loading conditions. This is especially applicable to areas of seismic activity. Developments in dynamic soilstructure interaction polat gulkan. For the structure founded on the soil, the motion of the base of the structure will be different from the case of fixed base 7, because of the coupling of the structuresoil system. Some structures where ssi is especially important are buildings, bridges and oil rigs. Therefore, these bridges are considered as frame structures. Probabilistic analysis of offshore wind turbine soil.
Kinematic interaction principally affects the frequency content and amplitude of foundation motions relative to. A semiinfinite cone model has been used to evaluate base soil characteristics of buildings. Both inertial and kinematic soilstructure interaction ssi effects can contribute to the response of a structure resting on a compliant geologic medium. Pile foundations and retaining structures by guoxi wu b. The mechanical behavior of structures that are in contact with soil is a ected by the interaction between the soil and the structure. Dynamic soilstructure interaction dr nick oriordan arup abstract geotechnical engineering is at its most unpredictable and uncomfortable when variable or dynamic loads on foundation systems are significantly higher than in the static or at rest condition. To the writers knowledge, it is luco and contesse 6 in 1973 to come up first with the structuresoilstructure. Soilstructure interaction modelling for piles in performancebased seismic design. Csi software models soilstructure interaction using a oneparameter winkler soil model. Both studies are performed using the finite element program lsdyna. Dynamic soil structure interaction geoslope international.
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