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. There are two methods available for modeling the soilstructure interaction ssi. Comparison of structural elements response in plaxis 3d and. A simple soil model will be constructed and connected in series with a 1d structure model. Soilstructure interaction effects, analysis and applications in design the study of soil structure interaction ssi is related to the field of earthquake engineering. Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and. 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. One modeling feature useful to soilstructure interaction is the gap compressiononly link object, which enables foundation uplift without the development of tensile forces. System for analysis of soilstructure interaction sassi. 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. Dear all, i am modelling a tunnel structure rectangular using soilstructure interaction in sap2000. Earthquake recordings from a model test structure located at garner valley california are used to evaluate inertial soilstructure interaction ssi effects.
This video describes the method of modelling of a building in sap 2000. 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. 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. This is especially applicable to areas of seismic activity. Earthquake wavesoilstructure interaction analysis of tall. The prevalence of manual engineering methods in wiring harness manufacturing compounds these. 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. Soilstructure interaction using computer and material models covers computer and analytical methods for a number of geotechnical problems.
Corresponding author, university of bologna, italy amorosi a. Soilstructure interaction ssi analysis is a special field of earthquake engineering. Sap 2000 is an integrated software for structural analysis and. This manual provides guidance for performancebased design and evaluation of concrete hydraulic structures chs. 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. 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. 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.
The purpose of this paper is to present the soiltunnelstructure. 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. Interaction with stress analysis currently under testing, not available in initial release. Downloads code sap2000 abilities for soilstructure interaction arabic. The test structure consists of steel columns and bracings 4. Soilstructure interaction livermore software technology corp. 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. The direct method is used for modeling the soil and a tall building together. 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.
Inertial interaction springs used to represent soilfoundation interaction complexvalued if rigid foundation, simplifies to. A new frequency domain method for evaluating the earthquake input energy to a structurepile system or a superstructure alone subjected to horizontal ground motion. It influences the behavior of soil, as well as the response of pile under loading. Structuresoilstructure interaction sssi, put forward in recent decades, means the dynamic interaction problem among the multistructure system through soilground. The sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. 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 technical knowledge base. A simple threedimensional soilstructure interaction ssi model is proposed. Earthquake wavesoilstructure interaction analysis of. Dear all, i am modelling a tunnel structure rectangular using soil structure interaction in sap2000. There are two methods available for modeling the soil structure interaction ssi.
The earthquake wave soil structure interaction analysis of tall buildings is the main focus of this research. Sap2000 tutorials training videos, manuals and model files 38 gb includes import from autocad to sap2000 inconsistent finite element mesh. 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. Spatial frame with beams and columns and global coordinate system of 30 cm x 30 cm fig. It introduces the main factors important to the application of computer. 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. A simple soilstructure interaction model sciencedirect. Feb 29, 2012 the natural eigen frequency of the soil layer without footing which is 18. 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. It was first developed at the university of californiaberkeley in 1981.
Which model is better for soilstructure interaction in sap. 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. Both the soilstructure system and the structure model alone are subjected to identical base excitations via a benchscale shaking table. The fundamental problem with the use of this model is to determine the stiffness of elastic springs used to replace the soil below foundation. 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. 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.
The dynamic effect of the soil structure interaction is clear. Sassi is the system for analysis of soilstructure interaction, a computer code for performing finite element analyses of soilstructure interaction during seismic ground motions. 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. The starting point for this work was decades of available soil structure interaction research, and recently published engineering guidance for static analysis procedures. Comparison of structural elements response in plaxis 3d. Jun 30, 2015 civilax is the knowledge base covering all disciplines in civil engineering. 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. Soilstructure interaction plays an important role in the behavior of structure under static or dynamic loading. Home software manuals sap2000 abilities for soil structure. 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. Define links, and their associated properties, which will represent lateral support from the soil. 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 is strongly recommended that you read this manual and work the tutorial before attempting a real project using sap2000. Recent advances in seismic soilstructure interaction.
The earthquake wavesoilstructure interaction analysis of tall buildings is the main focus of this research. Spra that utilizes nonlinear soilstructure interaction nlssi analysis. Jun 12, 2017 this video describes the method of modelling of a building in sap 2000. 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. 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. Sap2000 abilities for soilstructure interaction civil. 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. Civilax on geotechnical engineering books foundation engineering, soil mechanics, rock mechanics, geology tunneling etc. One modeling feature useful to soilstructure interaction is the gap compressiononly link object, which enables foundation uplift without the development of. 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. Construction design with sap2000 desain konstruksi dengan sap 2000 csi analysis reference manual csi automated lateral loads manual dabt2 tinh noi luc sap2000. Structural software for analysis and design sap2000.
Soil structure interaction ssi analysis is a special field of earthquake engineering. In that model, the layered soil medium is divided into thin layers and each thin layer is represented by a parametric model. A system for analysis of soilstructure interaction. 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. Soil structure interaction at a finite distance from a structure, the absolute displacements must approach the freefield displacements 16. Seismic design of buildings worked examples worked examples presented at the workshop ec 8. Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it. Sap2000 tutorials training videos, manuals and model files. Modeling of soil in sap2000 for use in soil structure interaction. Sap 2000 is an integrated software for structural analysis and design. Earthquake design and evaluation of concrete hydraulic structures.
Soilstructure interaction livermore software technology. 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 university of california, berkeley. 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. Flush a computer program for approximate 3d analysis of. The starting point for this work was decades of available soilstructure interaction research, and recently published engineering guidance for static analysis procedures. Note that gap objects exhibit nonlinear behavior, and therefore require a nonlinear load case during analysis. Inertial interaction springs used to represent soil foundation interaction complexvalued if rigid foundation, simplifies to. The hyperlinks below, present the concepts and techniques associated with modeling soilstructure interaction. Soilstructure interaction certified training institute. Dear all, i am modelling a tunnel structure rectangular using soilstructure interaction in. Sap2000 abilities for soil structure interaction arabic. Additional information can be found in the online help facility available. Dynamic soil structure interaction geoslope international.
The analysis is highly essential for predicting a more accurate structural behavior so as to improve the safety of structures under extreme loading conditions. First, a model is developed for a layered soil medium. Earthquake design and evaluation of concrete hydraulic. 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. Stated conversely, the presence of a stiff structure could possibly affect the response of the ground to earthquake shaking. Mar 27, 2019 the modeling of lateral soil support proceeds as follows. Jun 23, 2016 soilstructure interaction plays an important role in the behavior of structure under static or dynamic loading. Chapter 1 welcome to sap2000 program levels and features 1 3. The program has been developed specifically for practical applications and has the following characteristics.
Civilax is the knowledge base covering all disciplines in civil engineering. 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. Soilstructure interaction is an area of major importance in geotechnical engineering and geomechanics advanced geotechnical engineering. Which model is better for soilstructure interaction in sap 2000 jointsprings or link element. The modeling of lateral soil support proceeds as follows. In this study, the effect of soil structure interaction on behavior of reinforced concrete. Csi software models soilstructure interaction using a oneparameter winkler soil model. 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. We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering.
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