To address this problem, a finite element method is used to model soil structure interaction analysis of raft foundation supported framed structures by programming in sap 2000 v14 software. It influences the behavior of soil, as well as the response of pile under loading. The purpose of this paper is to present the soiltunnelstructure. Recent advances in seismic soilstructure interaction. 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. Effects of soil structure interaction on behavior of. To address this problem, a finite element method is used to model soil structure interaction analysis of raft foundation supported framed structures by programming in. Soilstructure interaction certified training institute. The earthquake wave soil structure interaction analysis of tall buildings is the main focus of this research. Earthquake wavesoilstructure interaction analysis of.
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. The sassi 2000 module adds capability to export the sap2000 structural model to sassi system for analysis of soilstructure interaction where soilstructure interaction analysis is performed and then import sassi results. Earthquake design and evaluation of concrete hydraulic structures. Jun 30, 2015 civilax is the knowledge base covering all disciplines in civil engineering. Dear all, i am modelling a tunnel structure rectangular using soil structure interaction in sap2000. Jun 23, 2016 soilstructure interaction plays an important role in the behavior of structure under static or dynamic loading. Home software manuals sap2000 abilities for soil structure.
It is very important to note that the structural response is mainly due to the soil structure interaction forces that brings an impact on the structure. Soilstructure interaction plays an important role in the behavior of structure under static or dynamic loading. Corresponding author, university of bologna, italy amorosi a. 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. Sap2000 follows in the same tradition featuring a very sophisticated, intuitive and versatile user interface powered by an unmatched analysis engine and design tools for engineers working on transportation, industrial, public works, sports, and other. Inertial interaction springs used to represent soil foundation interaction complexvalued if rigid foundation, simplifies to.
The starting point for this work was decades of available soil structure interaction research, and recently published engineering guidance for static analysis procedures. Which model is better for soilstructure interaction in. Inertial interaction springs used to represent soilfoundation interaction complexvalued if rigid foundation, simplifies to. Sap2000 abilities for soilstructure interaction civil. It was first developed at the university of californiaberkeley in 1981. Sap2000 tutorials training videos, manuals and model files.
Dear all, i am modelling a tunnel structure rectangular using soilstructure interaction in sap2000. Sap2000 abilities for soil structure interaction arabic. Mar 27, 2019 the modeling of lateral soil support proceeds as follows. 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. Sap2000 follows in the same tradition featuring a very sophisticated, intuitive and versatile user interface powered by an unmatched analysis engine and design tools for engineers working on transportation, industrial, public works, sports, and other facilities.
There are two methods available for modeling the soil structure interaction ssi. Flush a computer program for approximate 3d analysis of. Note that gap objects exhibit nonlinear behavior, and therefore require a nonlinear load case during analysis. Structuresoilstructure interaction sssi, put forward in recent decades, means the dynamic interaction problem among the multistructure system through soilground. For nongapping soil behavior, draw one link per joint figure 1, and for gapping soil behavior, draw two links per joint, one on each side figure 2. Feb 29, 2012 the natural eigen frequency of the soil layer without footing which is 18. The hyperlinks below, present the concepts and techniques associated with modeling soilstructure interaction. Soilstructure interaction technical knowledge base. Earthquake recordings from a model test structure located at garner valley california are used to evaluate inertial soilstructure interaction ssi effects. Common sense tells us that every seismic structural response is caused by soil structure interaction forces im pacting structure by the definition of seismic excitation. 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. Earthquake design and evaluation of concrete hydraulic. First, a model is developed for a layered soil medium. Soilstructure interaction livermore software technology corp.
System for analysis of soilstructure interaction sassi. The modeling of lateral soil support proceeds as follows. Construction design with sap2000 desain konstruksi dengan sap 2000 csi analysis reference manual csi automated lateral loads manual dabt2 tinh noi luc sap2000. Downloads code sap2000 abilities for soilstructure interaction arabic. Sap 2000 is an integrated software for structural analysis and design. The direct method is used for modeling the soil and a tall building together. It is strongly recommended that you read this manual and work the tutorial before attempting a real project using sap2000.
One modeling feature useful to soilstructure interaction is the gap compressiononly link object, which enables foundation uplift without the development of. Structural software for analysis and design sap2000. Csi software models soilstructure interaction using a oneparameter winkler soil model. It has been asserted in literature that the understanding of the software used today is the urgent necessity of the moment in order to match the pace of infrastructural development.
Modeling of soil in sap2000 for use in 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. This video describes the method of modelling of a building in sap 2000. Spatial frame with beams and columns and global coordinate system of 30 cm x 30 cm fig. The starting point for this work was decades of available soilstructure interaction research, and recently published engineering guidance for static analysis procedures. Soilstructure interaction using computer and material models covers computer and analytical methods for a number of geotechnical problems.
Chapter 1 welcome to sap2000 program levels and features 1 3. Comparison of structural elements response in plaxis 3d. Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it. This manual provides guidance for performancebased design and evaluation of concrete hydraulic structures chs. Stated conversely, the presence of a stiff structure could possibly affect the response of the ground to earthquake shaking. One modeling feature useful to soilstructure interaction is the gap compressiononly link object, which enables foundation uplift without the development of tensile forces. The analysis is highly essential for predicting a more accurate structural behavior so as to improve the safety of structures under extreme loading conditions. The program has been developed specifically for practical applications and has the following characteristics.
Additional information can be found in the online help facility available. I am working on soil structure interaction in my thesis i modeled rc buildings frame 5,10,15,20 storeys i want to include the effect of ssi using sap2000 first i assumed that the base of structures is fixed and use the response spectrum analysis you can include the ss and s1 and also you can choose the soil class. This study is undertaken with the objective of checking the comptability of results obtained for the design of basic structural elements of reinforced cement concrete rcc using popularly used software. The prevalence of manual engineering methods in wiring harness manufacturing compounds these. Dynamic soil structure interaction geoslope international. A simple threedimensional soilstructure interaction ssi model is proposed. In that model, the layered soil medium is divided into thin layers and each thin layer is represented by a parametric model. A simple soilstructure interaction model sciencedirect. Which model is better for soilstructure interaction in sap 2000 jointsprings or link element. The dynamic effect of the soil structure interaction is clear. Civilax is the knowledge base covering all disciplines in civil engineering. Both the soilstructure system and the structure model alone are subjected to identical base excitations via a benchscale shaking table.
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. Apr 26, 2015 sap2000 tutorials training videos, manuals and model files 38 gb analysis and design of 11 storey building using sap2000, etabs, csicol, excel analysis and design of a building in sap2000 spanish analysis of frame structure using sap2000 beams modeling bridge design course with sap2000 building foundation modelling using sap2000. 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 over time at. A simple soil model will be constructed and connected in series with a 1d structure model. Limitations of winkler model a number of studies in the area of soil structure interaction have been conducted on the basis of winkler hypothesis for its simplicity. Civilax on geotechnical engineering books foundation engineering, soil mechanics, rock mechanics, geology tunneling etc. The earthquake wavesoilstructure interaction analysis of tall buildings is the main focus of this research. 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. It introduces procedures that show how to design or evaluate a hydraulic structure to have a predictable performance for specified levels of seismic hazard. Which model is better for soilstructure interaction in sap. Soilstructure interaction livermore software technology. 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. One modeling feature useful to soil structure interaction is the gap compressiononly link object, which enables foundation uplift without the development of tensile forces. A system for analysis of soilstructure interaction.
The fundamental problem with the use of this model is to determine the stiffness of elastic springs used to replace the soil below foundation. Soil structure interaction at a finite distance from a structure, the absolute displacements must approach the freefield displacements 16. Dear all, i am modelling a tunnel structure rectangular using soilstructure interaction in. 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. Sap2000 follows in the same tradition featuring a very advanced, intuitive and versatile user interface powered by an unmatched analysis engine and design tools for engineers working on transportation, industrial, public works, sports, and other f. Comparison of structural elements response in plaxis 3d 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. Seismic design of buildings worked examples worked examples presented at the workshop ec 8. Soilstructure 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. It introduces the main factors important to the application of computer.
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. Interaction with stress analysis currently under testing, not available in initial release. Common sense tells us that every seismic structural response is caused by soilstructure interaction forces im pacting structure by the definition of seismic excitation. Jun 12, 2017 this video describes the method of modelling of a building in sap 2000. This is especially applicable to areas of seismic activity. However, earthquakes in recent years have clearly shown the importance of soil structure interaction on the design of the structures, and studies on soil structure interaction have increased especially in the last 50 years. The test structure consists of steel columns and bracings 4. Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and. Define links, and their associated properties, which will represent lateral support from the soil. Im trying to model soil structure interaction on sap2000 im using george gazetas rules to replace the soil and foundation with a springs to represent the dynamic stiffness and damping with six dof. This study is undertaken with the objective of checking the comptability of results obtained for the design of basic structural elements of reinforced cement concrete rcc using popularly used software staad pro.
Soil structure interaction ssi analysis is a special field of earthquake engineering. Soilstructure interaction is an area of major importance in geotechnical engineering and geomechanics advanced geotechnical engineering. In this study, the effect of soil structure interaction on behavior of reinforced concrete. There are two methods available for modeling the soilstructure interaction ssi. A new frequency domain method for evaluating the earthquake input energy to a structurepile system or a superstructure alone subjected to horizontal ground motion. Sap 2000 is an integrated software for structural analysis and. Earthquake wavesoilstructure interaction analysis of tall. The experiment serves as an introduction to the modeling of soilstructure systems and. We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering. The sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. Soilstructure interaction effects, analysis and applications in design the study of soil structure interaction ssi is related to the field of earthquake engineering.
Soilstructure interaction ssi analysis is a special field of earthquake engineering. A system for analysis of soilstructure interaction university of california, berkeley. 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. 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.
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