Soil structure interaction arash khosravifar fugro consultants, inc. Our experience is in substructual engineering, geotechnic. Jun 23, 2016 in soilstructure interaction analysis the distribution of load from the structure to the soil is investigated. Because our engineers are also consultants, soilstructure software is in. A new interactive computer code is presented in this paper for dynamic and soil structure interaction ssi analyses. Practical seismic design considering nonlinear soilpile. The hyperlinks below, present the concepts and techniques associated with modeling soilstructure interaction. Soil structure interaction broadly can be divided into two phenomena.
Introduces students to analytical and numerical solutions to soilstructure interaction problems. Soil structure interaction introduces students to analytical and numerical solutions to soil structure interaction problems. System for analysis of soilstructure interaction sassi verification. Includes methods of solution for beams and mats on elastic foundations. Also i would like to know of a software for the modelling of soil layers and their effect on the basic acceleration on the surface. Opensees pacific earthquake engineering research center. Its based on principles of collaboration, unobstructed discovery, and, most importantly, scientific progression. The np is the result of soilstructure interactions, to find the force balance and settlement equilibrium. The behavior of soil is predicted based on the engineering properties of soil, vertical soil profile and the alignment of ground surface. The mechanical behavior of structures that are in contact with soil is a ected by the interaction between the soil and the structure.
Soilstructure interaction technical knowledge base. The problems are defined in terms of their variational formulation and can be easily implemented using freefem language. Earthquake hazards reduction program nehrp earthquake structural and. Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and. Sassi is the system for analysis of soilstructure interaction, a computer code for performing finite element analyses of soilstructure interaction during seismic ground motions. Postprocessing of a soilfoundationstructureinteraction problem. Some structures where ssi is especially important are buildings, bridges and oil rigs. Mastodon is a moosebased application for nonlinear, threedimensional seismic soilstructure interaction analysis. Negative skin friction pile concepts with soilstructure. Sassi is the system for analysis of soilstructure interaction, a computer code.
Soil structure interaction modelling slope stability. This is especially applicable to areas of seismic activity. Soilstructure interaction ssi analysis evaluates the collective response of three. Flac, fast lagrangian analysis of continua, is numerical modeling software for advanced geotechnical analysis of soil, rock, groundwater, and ground support in two dimensions. Postprocessing of a soil foundation structure interaction problem. Idaho national laboratory is a cutting edge research facility which is a constantly producing high quality research and software. Opensees the open system for earthquake engineering simulation. Recent advances in nonlinear soilstructure interaction. Soilstructure software slab on grade mat or raft foundation drilled pier shallow foundation cantilever shoring lateral foundation grade beam cantilever retaining wall tieback wall liquefaction spt settlement analysis driven pile professional software packages all 12 software package any 7 software package three software combination geotechnical analysis package deep foundation design suite. Feel free to take a look at our other software and scientific offerings at. Seismic analyses and design of foundation soil structure. Freefem is a free and open source parallel fea software for multiphysics simulations.
Soilstructure interaction research project a practical. A simple soilstructure interaction model sciencedirect. The following information details specific capabilities of lusas for soilstructure interaction modelling. This interaction is called soil structure interaction, abbreviated ssi.
Mtrsassi software is a substructuring program that uses the complex frequency response method and finite element technique to solve a wide range of dynamic soil structure interaction problems. Structuresoilstructure interaction between underground. A system for analysis of soilstructure interaction. Above the np, the soil settles more with respect to the pile, so there is nsf. Wood department of civil engineering, queen mary colleqe, mile end road, london e1 4ns, uk the development of a commercially available computer program rafts, for the analysis of soil structure interaction problems in the context of building structures is described. Piles in liquefied soils 2d approach uc davis with professor ross boulanger 2.
A system for analysis of soilstructure interaction university of california, berkeley. The program uses classical soil mechanics procedures for determining the limiting active, atrest, and passive soil pressures. Pro is one of the most widelyused software for developing and analyzing the designs of various structures, such as petrochemical plants, tunnels, bridges etc. Open system for earthquake engineering simulation opensees software was used to. Opensees is an open source software framework for structural and geotechnical applications in both sequential and parallel environments. Soilstructure interaction ssi affects the overall behaviour of the wind turbine system in mainly three ways. Apr 01, 2014 integral bridge analysis using soil structure interaction oasys software webinar duration. A numerical study is made on the dynamic throughsoil interaction between underground station and nearby pile supported surface structure on viscouselastic soil layer, under vertically incident s wave. Visualization of results on solid elements by means of a volume plot. The best software for modeling intraction soil structure.
After more than a quarter century of consulting engineering work, i have come to the conclusion that our project engineers need robust software with familiar inputs. Topics academic work collection scholarworkspaces language english. Based on the proposed model, a general computer software is developed. The analysis is highly essential for predicting a more accurate structural behavior so as to improve the safety of structures under extreme loading conditions. Soil pile interaction single pile pushover clay 0 0 20000 30000 40000. It influences the behavior of soil, as well as the response of pile under loading. The paper concludes with an overview of the advantages of the nonlinear time domain technique to soilstructure interaction problems in the.
Any idea about the software for the soilstructure interaction. Does anybody know a good software for modelling soil. Soilstructure interaction, response history analysis. To date our community has made over 100 million downloads. Gsa building is the ultimate building design software, steel structure design software and steel structure analysis program. 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. Dynamic analysis of soil structure interaction effect on. Two model 2d rc frames with 7 and 12 story are selected for analysis.
Opensees the open system for earthquake engineering simulation earthquake engineering has long been hampered by limitations of available computational procedures. Sigmaw s structural elements can be used to model anchors, nails, tiebacks, wall systems, piles or any other soilstructure interaction problem in. Example of absorbing boundaries using the vs3d4 element available in opensees. New computer simulation tools are necessary to integrate the best knowledge from all the disciplines so that more effective engineering can be practiced. Soilstructure software slab on grade mat or raft foundation drilled pier shallow foundation cantilever shoring lateral foundation grade beam cantilever retaining wall tieback wall liquefaction spt settlement analysis driven pile professional software packages all 12 software package any 7 software package three software combination geotechnical analysis package. Structuresoilstructure interaction sssi, put forward in recent decades, means the dynamic interaction problem among the multistructure system through soilground. 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. System for analysis of soilstructure interaction sassi. In this study dynamic analysis of soil structure interaction ssi effect on multi story reinforced concrete rc frame founded on soft soil flexible base is made and compared with fixed base. Conventionally, the soil foundation structure interaction effects for bridges supported on large gravity type caissons have been considered by using the substructure methods i. The case of the liquefaction of a sand layer is discussed.
Paper open access soilstructure interaction and motion. One modeling feature useful to soilstructure interaction is the gap compressiononly link object, which enables foundation uplift without the development of. Conventionally, the soilfoundationstructure interaction effects for bridges supported on large gravity type caissons have been considered by using the substructure methods i. Common sense tells us that every seismic structural response is caused by soilstructure interaction forces impacting structure by the definition of seismic excitation. A simple threedimensional soilstructure interaction ssi model is proposed. All facilities are based on the trusted and proven general capability of the lusas finite element system. Soil structure interaction ssi analysis is a special field of earthquake engineering. View which model is better for soilstructure interaction in sap. It gives engineers all the tools they need to design and analyse even the most complex buildings. This is a list of software packages that implement the finite element method for solving partial differential equations. A secondary purpose is to, via this thesis, strengthen afs competence in soilstructure interaction and open up the possibility for future projects in this eld. Common sense tells us that every seismic structural response is caused by soil structure interaction forces impacting structure by the definition of seismic excitation. One modeling feature useful to soil structure interaction is the gap compressiononly link object, which enables foundation uplift without the development of tensile forces. Soilstructure interaction plays an important role in the behavior of structure under static or dynamic loading.
Soilstructure interaction for building structures nehrp. 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. View which model is better for soil structure interaction in sap. Soilstructure interaction ssi analysis is a special field of earthquake engineering. Integral bridge analysis using soil structure interaction oasys software webinar duration. This paper focuses on the dynamic interaction and the interactive influence on seismic response of adjacent surface structure and underground structure. A numerical study is made on the dynamic through soil interaction between underground station and nearby pile supported surface structure on viscouselastic soil layer, under vertically incident s wave. Soilstructure interaction livermore software technology corp. Does anybody know a good software for modelling soil structure. Plates on elastic foundation rectangular and circular, plates on twoparameter soil medium, use of finite difference method fdm for soil structure interaction problems week 10. Opensee 2012 practice soil structure interaction youtube. 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. The response of the ground and nearby structures to tunnelling constitutes a complex soilstructure interaction boundary value problem. Flush a computer program for approximate 3d analysis of.
Plaxis, flac, opensees which is free open source to name a few. Follow the links provided to stream and download media content. Below the np, the pile moves downwards relative to the soil, thus developing positive shaft friction psf. Pro v8i, the latest version, allows civil engineering individuals to analyze structural designs in terms of factors like force, load, displacements etc. Csi software models soilstructure interaction using a oneparameter winkler soil model. The main focus of the study is to evaluate the effects of soil structure interaction and of the seismic motion incoherency on the bridge dynamic response. 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. Mastodon is a moosebased application for nonlinear, threedimensional seismic soil structure interaction analysis.
Soilpileinteraction single pile pushover clay 0 0 20000 30000 40000 50000 60000 70000 80000 90000 0 1 23 45 6 7 disp ft p lbft api clay at 45 ft flac at 40 ft flac at 50 ft opensees at 46 ft clay 0 0 20000 30000 40000 50000 60000 70000 80000 90000 01 23 45 67 disp ft p lbft api clay at 45 ft opensees at 46 ft. Download geotechnical engineering software pypile 0. The most familiar and commonly used computer tools were developed in the 1970s and 1980s, and are limited by simplifications and approximations that were necessary at the time. Open access is an initiative that aims to make scientific research freely available to all. Nonlinear seismic soil structure interaction ssi method for developing nonlinear seismic ssi analysis techniques justin coleman, p. Sassi is the system for analysis of soil structure interaction, a computer code for performing finite element analyses of soil structure interaction during seismic ground motions. Soilstructure interaction using bemfem coupling through. Feb 29, 2012 the natural eigen frequency of the soil layer without footing which is 18. Structuresoilstructure interaction between underground structure. Opensees is an open source software framework for structural and geotechnical applications in both sequential and parallel. Assessment of soilstructure interaction modeling strategies for. Earthquake ground motion causes soil displacement known as freefield. In this load transfer mechanism, the characteristics of soil has very important role.
The program has been developed specifically for practical applications and has the following characteristics. Soilstructure interaction etabs computers and structures. Soilstructure interaction large civil structures such as concrete dams, nuclear power plants, highrise buildings and bridges are massive enough that their vibration due to earthquake excitation affects the motion of the soil or rock supporting them,which in turn further affects the motion of the struc. The np is the result of soilstructure interactions, to. The paper includes comparisons of results obtained using the eurocode 8 analysis procedures and the stateoftheart seismic soilstructure interaction analysis using acs sassi. Structuresoil interaction ssi is an important research topic in earthquake. Arash khosravifar fugro discusses using the opensees software in practice soil structure interaction. Pile deflection, bending moment and shear force will be analyzed with different load cases. Pypile is a free lateral pile analysis software program based on py curves. The open system for earthquake engineering simulation opensees is a software framework. The dynamic effect of the soil structure interaction is clear. The main aim of this work is to develop, verify and apply in simulation study an efficient hybrid approach to study seismic response of a soilstructure system taking into account all the important components as. Welcome to soilstructure software tm soilstructure software. Soilstructure interaction livermore software technology.
It was first developed at the university of californiaberkeley in 1981. Iaea tecdoc on seismic soil structure interaction for. In this method, the soilfoundation system is treated as an elastic or equivalentelastic system in the frequency domain i. List of finite element software packages wikipedia. Unique among software for earthquake engineering, opensees allows. In this method, the soil foundation system is treated as an elastic or equivalentelastic system in the frequency domain i. 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. Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it. Winkler spring and half space direct method models are used for flexible base for the frames founded on two types of. Flac is used for analysis, testing, and design by geotechnical, civil, and mining. The hyperlinks below, present the concepts and techniques associated with modeling soil structure interaction.
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