Nehrp national earthquake hazards reduction program a. The arrangement and organization of soil particles in the soil, and the tendency of individual soil particles to bind together in aggregates. Soil structure interaction ssi is commonly accounted for by a bounded analysis employing several different models. A pdf file is a portable document format file, developed by adobe systems. Soil structure interaction, dynamic behavior of soil, seismic design, damping, vibration period, spectral accelerations. The code is widely used in the nuclear industry and in the department of energy doe.
Potential beneficial effect of soilstructure interaction when the period of the fixed base structure is located along the falling branch of a design spectrum figure 2. Results of the sssi analysis were compared with those from soil structure interaction ssi analysis of the individual buildings, for the following parameters. Review and cite soil structure interaction protocol, troubleshooting and other methodology. Soil soil doesdoes notnot possesspossess aa linearlinear oror uniqueunique stressstressstrainstrain relationship 22 soil soil behaviorbehavior dependsdepends onon pressure,pressure, time,time, andand. Mineral matter began as rock that was weathered into small particles. Read on to find out just how to combine multiple pdf files on macos and windows 10. 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. Task 3 is an investigation of soil structure interaction for the frp tubes. The analysis utilizes soil impedance functions for a structural foundation. Search by nptel course id, course name, lecture title, coordinator. Explain soil structure and various types of soil structure. Soil structure interactions an overview sciencedirect.
Soilstructure interaction broadly can be divided into two phenomena. This brief lecture introduces you to the topic of soil structure interaction. There are three basic things pnk that cause acidic soil. Relative sliding of soil particles result in rearrangementof soil particles, which is a nonlinear and irreversible phenomena, thus resulting in a nonlinear and irreversible stressstrain behavior of soils. These particles are labeled sand, silt, or clay, based on their size. Nptel provides elearning through online web and video courses various streams. Ceen 545 lecture 22 introduction to soil structure. Most electronic documents such as software manuals, hardware manuals and ebooks come in the pdf portable document format file format. A description of the basic phenomenon is given, and general guidance is provide. Sundaravadivelu,department of ocean engineering, iit madras. Depending on the type of scanner you have, you might only be able to scan one page of a document at a time. Soil structure interaction course nptel online courses. The course will focus on the different soil structure interaction models for shallow foundation under various loading conditions and subgrade characteristics. Use of finite difference method fdm for soil structure interaction problems continued, computer programs based solution of different interaction problems such as beams, plates, application of foundation models in real life problem.
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. To achieve this goal, harness used the fully nonlinear method in which main component of the interaction soil pile structure finite element fe model. Epri report 1015111 program on technology innovation. An abaqus toolbox for soilstructure interaction analysis. You can use the tools in paint to add something to a different document. Soilstructure interaction ssi analysis is a special field of earthquake engineering. The soil structure interaction analysis results of the hypothetical waste handling facility reported herein showed significant influence of the geologic profiles of the foundation medium and their geotechnical and dynamic properties on the seismic structural response of the facility. For this purpose, a towdimensional finite element program, sap2000 32, has been used to numerically model and examine the influence of the soil pile structure interaction on seismic fragility. Once youve done it, youll be able to easily send the logos you create to clients, make them available for download, or attach them to emails in a fo. The first, and most common, is simply that the organic matter and minerals that break down in a soil over time are acidic in nature, and make the soil acidic. Single degree of freedom sdof model of a structure foundation system with a concentrated mass, m e located h e above the foundation, and three springs k s, k h and k. Where floor plan enlarges below grade a virtual outrigger is created by foundation walls engaged laterally by slab diaphragms, and this virtual outrigger action is commonly referred to as the backstay effect peeratc. Lecture notes soil behavior civil and environmental.
Aggregation creates intraaggregrate and interaggregate pore space, thereby changing flow paths for water, gases, solutes and pollutants. Understanding the interacting behaviour is also difficult. Recently, there has been considerable interest in the. Searching for a specific type of document on the internet is sometimes like looking for a needle in a haystack. Evaluation of interaction is basic to the design of foundations for machines and for large dynamically loaded structures such as radar towers 5, 7. This article explains what pdfs are, how to open one, all the different ways. The 14 th world conference on earthquake engineering october 1217, 2008, beijing, china 1. The experimental results are shown to be consistent with established theories. This is especially applicable to areas of seismic activity. Soil mechanics arnold verruijt delft university of technology, 2001, 2006 this is the screen version of the book soil mechanics, used at the delft university of technology. This document is highly rated by civil engineering ce students and has been viewed 1038 times. Ground structure interaction ssi consists of the interaction between soil ground and a structure built upon it. Determination of properties of soil of different types itself is a specialized topic of geotechnical engineering.
Soil structure interaction retaining structures structure interaction examples pi h llpipe shells. Also the dynamic response of the structure itself would. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved. In week 2, i will discuss about general soil structure interaction problems, then the concept of. Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file. Overall strain of a soil mass is the combined effect of particle deformation and interparticle sliding. Soil structure interaction affects the natural periods of a structure, and the forces and motions induced in the structure. The influence of the soil structure interaction in the. Foundation design considerations and the necessary calculations are also covered. It influences the behavior of soil, as well as the response of pile under loading. Design of foundations for offshore wind turbines wiley.
Also, the soil structure interaction ssi problem has become an important feature of structural engineering with the advent of massive constructions on soft. Soilstructure interaction for building structures national. Because compressive strength of the soil is generally much weaker than that of the concrete, the contact area between the soil and the footing is much larger than that of the columns and walls. Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. Jun 23, 2016 soil structure interaction plays an important role in the behavior of structure under static or dynamic loading. Soilstructure interaction civil engineering ce notes edurev. This interaction between the structure and the soil is named soilstructure interaction ssi. Determination of structure soil structure interaction sssi effects, if any between large and more massive process building pb and exhaust fan building efb. Elastic soilstructure interaction is it worth the effort. It is primarily an exchange of mutual stress, whereby the movement of the ground structure system is influenced by both the type of ground and the type of structure. Soil structure interaction ssi eva luates the collective re sponse of the structure, the foundation, a nd the soil underly ing and surrounding the foundation to a specified ground motion. The influence of soil structure interaction in the analysis and design of a 6storey and basement reinforced concrete frame building is investigated. Various combinations of soil and structure can either.
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. Factors affecting soil erosion and effects of soil erosion. Earthquake ground motion causes soil displacement known as freefield. Foundation structures undergo soil structure interaction. The dynamic effect of the soil structure interaction is clear. This means it can be viewed across multiple devices, regardless of the underlying operating system. Most soils have different sizes of mineral particles.
Effect of soilstructure interaction on seismic response of. One of the fun things about computers is playing with programs like paint. If your pdf reader is displaying an error instead of opening a pdf file, chances are that the file is c. Im doing some application on soil structure interaction and i want to calculate the shear modulus of the soil using the wave velocity given in the eurocode 8. I paid for a pro membership specifically to enable this feature. If your scanner saves files as pdf portbale document format files, the potential exists to merge the individual files into one doc. The geotechnical site investigation and soil behavior soil structure interaction are discussed, and the final chapter takes a case study of a wind turbine and demonstrates how to carry out step by step calculations. As we all know, the response of a structure to earthquake shaking is affected by 3 linked systems, the structure, the foundation and the soil. Vertical displacements at the pile head obtained from fbmultipier and apile are plotted below. Soil structure interactions an overview sciencedirect topics. Lecture 9 soil structure interaction for shallow foundation.
Common sense tells us that every seismic structural response is caused by soilstructure interaction forces impacting structure by the definition of seismic excitation. Soil structure sand, silt, clay, and organic matter particles in a soil combine with one another to form larger particles of various shapes and sizes and are often referred to as aggregates, or clusters. 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 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. Soil texture the inorganic material in soil is called mineral matter. The objective of this investigation is to develop a method for a simple extension of the responsespectrum procedures in seismic buildj ing analysis to include dynamic soil structure interaction. Keywordsseismic response, soil structure interaction. Kinematic interaction is due to the spatial variation of the freefield ground motion over the portion of the foundation structure system abutting the soil or rock. Inertial soil structure interaction inertia from vibration of structure and foundation causes foundation translation and rotation u f and.
An oversized pdf file can be hard to send through email and may not upload onto certain file managers. Making a pdf file of a logo is surprisingly easy and is essential for most web designers. Feb 29, 2012 the natural eigen frequency of the soil layer without footing which is 18. Therefore, the behaviour of foundation structures depends on the properties of structural materials and soil. Apr 08, 2014 the soil having ph less than 7 is called acidic soil extremely acidic soil has ph between 44. Soilstructure interaction civil engineering ce notes. Soil structure is the arrangement of the soil particles into aggregates of various sizes and shapes. Recent advances in seismic soilstructure interaction.
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