Dynamic Soil-structure Interaction (Prentice-Hall International Series in Civil Engineering and Engineering Mechanics) pdf.
Dynamic Soil-structure Interaction (Prentice-Hall International Series in Civil Engineering and Engineering Mechanics) by John P. Wolf pdf.
In the seismic analysis of a structure founded on rock, the motion experienced by the base is essentially identical to that occurring in the same point before the structure is built. The calculation can thus be restricted to the structure excited by this specified motion. In the case of a soft site, two important modifications arise for the same incident seismic waves from the source. First, the free-field motion at the site in the absence of the structure is strongly affected. Second, the presence of the structure in the soil will change the dynamic system from the fixed-base condition. The structure will interact with the surrounding soil, leading to a further change of the seismic motion at the base. This text on soil-structure interaction deals with both the free-field response and the actual interaction analysis. Soil-structure interaction is also important for other loading cases (e.g., arising from unbalanced mass in rotating machinery)
The effect of soil-structure interaction is recognized to be important and cannot, in general, be neglected. Even the seismic-design provisions applicable to everyday building structures permit a significant reduction of the equivalent static lateral load compared to that applicable for the fixed-base structure. For the design of critical facilities, especially nuclear power plants, very complex analyses are required which are based on recent research results, some of which have not been fully evaluated. This has led to a situation where the analysis of soil-structure interaction has become a highly controversial matter.
A uniform approach to analyze both the free-field response as well as the actual interaction analysis is presented in this text. This rigorous procedure, based on wave propagation, makes use of such familiar concepts as the directstiffness method of structural analysis and also applies such recent developments as the boundary element method. The results of vast parametric studies are included, which can be used directly by the analyst. Examples from actual practice demonstrate that these methods are being applied. Besides the rigorous procedure, simple approximate methods are developed which nevertheless capture the essential features of soil-structure interaction. This allows the analyst to perform preliminary calculations with simplified models to determine the key parameters before starting with complicated computations.
Many aspects of this field are so well established that it is difficult to assign credit for them. Credit references have thus been restricted to those necessary for copyright reasons. Sincere apologies are offered to anybody who might feel offended by being left out. The author has been influenced over the years by the research published by many authorities; to name just a few in alphabetical order): Professors E. Kausel, J. E. Luco, J. Lysmer, J. M. Roesset, and A. S. Veletsos.
At the end of each chapter a summary is included. Then problems are formulated which not only allow the student to corroborate a full understanding of the analytical techniques, but which lead to new insights into the aspects. The problems thus form an important part of the text. The reader who has no intention of solving the problems in detail will find it advantageous to glance through them. As a rule, a detailed solution procedure is provided and the results, in many cases quite important on their own merit, are presented in the form of figures.
Dynamic Soil-structure Interaction pdf.
The course on which this text is based has been taught for the past few years at the Swiss Federal Institute of Technology in Zurich. It is offered for advanced undergraduate and graduate students in civil engineering. As a prerequisite some knowledge of structural dynamics is essential which can be acquired in a one-term course.
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