Effects of soil structure interaction on behavior of. Army corps of engineers soil mechanics basic concepts and engineering applications soil mechanics and foundations muni budhu 3 ed soil mechanics and foundations, 3rd edition soil mechanics book soil mechanics by arnold verruijt. Effects of soilstructure interaction on the excitation and response of a mediumrise rc building it is common tradition in iceland to found structures on compact gravel cushions. Sap2000 tutorials training videos, manuals and model files. Define links, and their associated properties, which will represent lateral support from the soil. A threeparameter elastic foundation model is used to incorporate the soilstructure interaction effect. Which model is better for soilstructure interaction in sap. Sap2000 is the finite element that is used in simulation of nonlinear super structure and soil structure interaction by linear springs. Attached articles abaqus and sap2000 programs are used to model the pilesoil interaction in sand.
Manual, computers and structures, inc, berkeley, calif. A 10storey braced steel space frame example taken from literature is investigated according to four different. Plaxis 3d as compared to that obtained by the wellknown sap2000, a widely used code for structural analysis. The third part of this volume, the sap2000 introductory tutorial manual, is intended to provide firsttime users with handson experience using the modeling, analysis and design features of sap2000.
Spra that utilizes nonlinear soilstructure interaction nlssi analysis. Effects of soilstructure interaction on the excitation and. A single structural model can be used for a wide variety of different types of analysis and design. Soil structure interaction and structural response. Soilstructure interaction technical knowledge base computers. We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering. Vibration control of piledstructures through structuresoil. Modeling, analysis and design courses london, uk computer and structures, inc. Structure with foundation on soil elastic, 3d elements duration. For deep foundation analysis, the fem and the soil response program must agree or converge on soilstructure lateral response. Csi software models soilstructure interaction using a oneparameter winkler soil model. About the manuals this manual is designed to help you quickly become productive with sap2000. Fema 2000 implies that soil structure interaction may modify the seismic demand on a building.
Overview of soilstructure interaction principles jonathan p. Soilstructure interaction livermore software technology corp. 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. Groundstructure interaction ssi consists of the interaction between soil ground and a structure built upon it. Soilstructure interaction broadly can be divided into two phenomena. Jun 23, 2016 in soilstructure interaction analysis the distribution of load from the structure to the soil is investigated. I am modelling a tunnel structure rectangular using soil. Civilax is the knowledge base covering all disciplines in civil engineering.
Downloads code sap2000 abilities for soil structure interaction arabic. Vibration control of piledstructures through structure. 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. Inertial interaction springs used to represent soilfoundation interaction complexvalued real part. To simulate the interaction between a structure and soil you can apply interface elements. Comparison of structural elements response in plaxis 3d. The behavior of soil is predicted based on the engineering properties of soil, vertical soil profile and the alignment of ground surface. Soil structure interaction and seismic design code provision even though the soil has good engineering characteristics 3. Which model is better for soilstructure interaction in. Seismic analysis and design of retaining walls, buried structures, slopes, and embankments explores analytical and design methods for the seismic design of retaining walls, buried structures, slopes, and embankments. Soilstructure interaction livermore software technology. Full modeling of soil, foundation, structure propagate waves through system.
Which model is better for soilstructure interaction in sap 2000 jointsprings or link element. May 10, 2017 general topics sap2000 csibridge etabs safe perform3d csicol. Overview of soil structure interaction principles jonathan p. A simple threedimensional soilstructure interaction ssi model is proposed. Modelling the interaction between structure and soil for. Soil modeling is demonstrated in the example problem, beam on elastic foundation, available within the software interface through help contents and index example problems problem j. Department of commerce national institute of standards and technology engineering laboratory gaithersburg, md 20899 by nehrp consultants joint venture a partnership of the applied technology council and the consortium of universities for research in earthquake 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. Seismic analysis and design of retaining walls, buried.
Welcome to soilstructure software tm soilstructure software. What is the best representation of soil on sap2000 to. Dear all, i am modelling a tunnel structure rectangular using soilstructure interaction in sap2000. Most of the design codes for structures recommends neglecting the effect of ssi in the seismic analysis of the structure. 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. Soilstructure interaction safe computers and structures. General topics sap2000 csibridge etabs safe perform3d csicol tutorials test problems documentation. Aug 20, 2012 to simulate the interaction between a structure and soil you can apply interface elements. Csi analysis reference manual for sap2000, etabs, safe. I work on a project of soil structure interaction which use a steel pile in the soil so that i. There are two methods available for modeling the soilstructure interaction ssi. If the soil material can be considered linear, the sap2000 program, using the solid the general equation of motion for a system subjected to an element.
How to model a soilstructure interaction for a pile using nonlinear. Downloads code sap2000 abilities for soilstructure interaction arabic. Optimum design of braced steel space frames including soil. Based on conventional theories it has been said that the soil structure interaction has effects that are beneficial for the structural response. More iteration will provide convergence much less than 1 percent. Trbs national cooperative highway research program nchrp report 611. Furthermore, according to fema 2000 the effects of soilstructure interaction must be evaluated for nearfield and soft soil sites and also for buildings in. This paper deals with the vibration control of existing structures forced by earthquake induced ground motion.
Soilstructure interaction response to high amplitude forced vibration d. 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. Nov 29, 2014 soil conditions have a great deal to do with damage to structures during earthquakes. Soil structure interaction using springs on sap2000. You can refer to the attached tutorial for details. Comparison of structural elements response in plaxis 3d and. Which model is better for soilstructure interaction in sap 2000 jointsprings or. To investigate soil structure interaction, a series of dynamic experiments were performed on fullscale mat foundations han, 1989 and on fullscale piles han and novak, 1989, 1992. Soil structure interaction amec presentationfinal 1. Soil structure interaction, seismic design, reinforced concrete buildings. 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. Pdf modeling of soilstructure interaction as finite element using. A cantilever retaining wall is considered and is been modeled for the soilstructure interaction using finite element package sap2000 version 14. Effects of soil structure interaction on the excitation and response of a mediumrise rc building it is common tradition in iceland to found structures on compact gravel cushions.
Earthquake ground motion causes soil displacement known as freefield. Soil structure interaction for building structures prepared for u. Soilstructure interaction etabs computers and structures. In this load transfer mechanism, the characteristics of soil has very important role. Pdf modeling of soilstructure interaction as finite. Chapter 1 welcome to sap2000 program levels and features 1 3. Soilstructure and interaction ssi analysis is similar kind of problem where all the. By using an interface, node pairs are created at the interface of structure and soil. Sap2000 abilities for soilstructure interaction civil. Evaluation of soilfoundationstructure interaction effects.
The computer program sap2000 and all associated documentation are. Jun 30, 2015 sap2000 research papers download sap2000 abilities for soil structure interaction arabic download. 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 direct method is used for modeling the soil and a tall building together. In other words, the moment, shear, deflection, and rotation of the two programs should be within 10 percent. Impact of soil structure interaction on the seismic design of. Effects of soilstructure interaction on the excitation. Earthquake wavesoilstructure interaction analysis of.
A threeparameter elastic foundation model is used to incorporate the soil structure interaction effect. Models using linear elements that are not based on nonlinear soil structure interaction are. Soilstructure interaction ssi analysis evaluates the collective response of three linked systems. 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. 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.
Modeling of soil in sap2000 for use in soil structure interaction. Fem model for fluidstrucutreinteraction added mass approach tanksoil interaction can be seen from fig. Soil structure interaction using springs on sap2000 stressed civilenvironmental 25 jul 15 15. In this study, the effect of soil structure interaction on behavior of reinforced concrete. Please also see the topic sap2000 news in the help facility within the program to learn more about the new and improved features in sap2000. Effect of interactions on dynamic active earth pressures m. Soilstructure interaction effects on seismic behaviour of. The computational method has been applied to important engineering practice han, 1987, and han, et al, 1999. An overall good match was obtained, as such highlighting the possibility to use the code plaxis 3d to perform both structural and geotechnical calculations in soilstructure interaction problems. Fema 2000 implies that soilstructure interaction may modify the seismic demand on a building.
A simple soilstructure interaction model sciencedirect. Optimum design of braced steel space frames including soilstructure interaction is studied by using harmony search hs and teachinglearningbased optimization tlbo algorithms. The earthquake wavesoilstructure interaction analysis of tall buildings is the main focus of this research. Keywords elevated water tanks, tank staging fluidstructure interaction seismic response sap2000. Hence the investigation on the energy transfer mechanism from soils to buildings during earthquakes is critical for the seismic design of multistory buildings and for upgrading existing structures.
Soil conditions have a great deal to do with damage to structures during earthquakes. Soil structure interaction and seismic design code provision. Without an interface the structure and the soil are tied together. I work on a project of soil structure interaction which use a steel pile in the soil so that i want to represent these piles in sap2000 program, i want the method that can represent these piles in. In that model, the layered soil medium is divided into thin layers and each thin layer is represented by a parametric model.
Optimum design of braced steel space frames including soil structure interaction is studied by using harmony search hs and teachinglearningbased optimization tlbo algorithms. Soil structure interaction at a finite distance from a structure, the absolute displacements must approach the freefield displacements 16. The modeling of lateral soil support proceeds as follows. Nonlinear dynamic soil structure interaction analysis. Soil springs stiffness properties are not degradation with pushover load curve. The objective of this thesis is to develop applicable guidelines to analyse and model large slab foundation structures. In soilstructure interaction analysis the distribution of load from the structure to the soil is investigated. The third part of this volume, the sap2000 introductory tutorial manual, is intended to provide firsttime users with handson experience using the. The report further illustrate the resonance vibration of building and variation in nature of design. The winkler foundation is a model that can be created in order to represent the stiffness and the dampening effects of the soil surrounding a pile shaft. To investigate soilstructure interaction, a series of dynamic experiments were performed on fullscale mat foundations han, 1989 and on fullscale piles han and novak, 1989, 1992. The bridge fem then uses the stiffness of the element to predict the seismic structural response. An overall good match was obtained, as such highlighting the possibility to use the code plaxis 3d to perform both structural and geotechnical calculations in soil structure interaction problems. Thus, the need for research into soilstructure interaction ssi problems is greater than ever.
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. To this aim it is proposed for the first time to exploit the structuresoilstructure mechanism to develop a device, hosted in the soil but detached from the structure, able to absorb part of the seismic energy so to reduce the vibration of neighbourhood structures. Soil structure interaction effects on pushover analysis of. Soilstructure interface effects on dynamic interaction analysis of reinforced concrete lifelines y. It is strongly recommended that you read this manual and work the tutorial before attempting a real project using sap2000. First, a model is developed for a layered soil medium.
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