SSI and Its Roles in Performance-Based Seismic Analysis of Shear Wall Structures (PhD Thesis)
Author: Yuchuan Tang | Size: 3.2 MB | Format:PDF | Quality:Original preprint | Publisher: University of California, Los Angeles | Year: 2009 | pages: 287
ABSTRACT
In order to systematically assess the complex soil-structure interaction (SSI) effects on the seismic responses of shear wall structures, this dissertation deals with several critical and inter-related topics under the framework of performance-based earthquake engineering. Firstly, the study develops improved pulse representations for earthquake ground motions that govern the peak structural responses. Based on rigorous dimensional analysis, the dimensionless Il-response spectra are derived for both linear and bilinear SDOF systems. They are shown to be congruent with the corresponding (dimensional) response spectrum in bi-logarithmic plotting. This leads to a novel approach to identify pulse parameters that match simultaneously the kinematic characteristics and the response spectrum of the original ground motion. The improved pulse representations can potentially be used as the intensity measures of earthquake ground motions. Secondly, the SSI effects of lumped soil-foundation-structure interacting (SFSI) systems are investigated through the dimensional analysis with pulse motions as input.
The dimensionless terms that govern the interactive behavior of SFSI systems are derived. The SSI effects are related explicitly and directly to the characteristics of input ground motions and the properties of SFSI systems. The conditions under which the SSI effects amplify or reduce the structural responses are also identified. Subsequently, dynamic responses of strip foundations bonded on linear or nonlinear soil half-space are investigated using the finite element method. The dynamic foundation responses are found to depend on the amplitude and frequency of input motion, foundation geometry, and soil properties. The energy dissipation through radiation damping for nonlinear soil case is reduced and can be quantified with two alternative factors related to the yielding of soil medium.
Finally, the SSI effects are evaluated for a realistic shear wall structure using the probabilistic seismic demand analysis where the nonlinear hysteretic behavior of shear walls and foundations are accurately modeled. Either the inelastic spectral displacement or the pulse representation is adopted as the intensity measure of input ground motions. The damage probability of the shear wall generally decreases when the SSI effects are considered for this case study.
Advisor: Professor Jian Zhang
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The purpose of this study is to investigate the P-Delta effect on bridge piers with consideration of soil-structure interaction effect. The traditional P-Delta effect was calculated assuming the base of the structure is fully fixed. However, all structures in real life are supported by soil, and soil is deformable. Therefore, under wind or earthquake loads, the additional lateral deflection of a bridge pier
caused by the deformation of the soil, which supports the pier, should be considered. The traditional method regarding the computation of the deflection of a pier caused by wind or earthquake loads does not take soil-structure interaction effects into account. In this study finite element analysis method will be used to investigate the additional overturning moment introduced by the soil-structure interaction effect.
Advisor: Assoc.Prof. Dr. J. Kent Hsia
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Dear Friends
i need paper
"Settlemet of Raft Foundations"
by Kay.J.N and Cavagano.R.L
Journal of Geotechnical Engineering division of ASCE 1983
vol 109 pp 1367-1382
could anyone share it?
thanks in advance
with best regards
mz55
This book is an introduction to surgery theory: the standard classification method for high-dimensional manifolds. It is aimed at graduate students, who have already had a basic topology course, and would now like to understand the topology of high-dimensional manifolds.
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Author: Romeyn Henry Rivenburg | Size: 5.2 MB | Format:PDF | Quality:Scanner | Publisher: American Book Company | Year: 1914 | pages: 80 | ISBN: B006CN21OW
The object of this book is to provide a thorough and effective review that is necessary in order to prepare college candidates for the entrance examinations and for effective work in the freshman year in college. This is the 1914 edition.
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Hello
I had been developing a spreadsheet for the calculation of Elastic settlements in foundations on granular soils using theory of Elasticity . I had problem for calculating "Depth Influence Factor" . I can only find a chart in literature generated using Fox's (1948) equation from where every time i had to read values and insert in the cell.
Can any one guide me that how can I find this Fox's equation or any other alternate way to get this factor without reading chart for every time.
Posted by: ziggywas1 - 01-22-2012, 08:14 AM - Forum: Archive
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I'm looking for the following parts of ISO 17123 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments:
Part 1 - Theory
Part 3 - Theodolites
Part 4 - Electro-optical distance meters
Part 5 - Electronic tacheometers
Any edition (standard, draft, for comment) would be appreciated.
Nuclear Safety is a comprehensive reference for heath & safety and engineering professionals in the nuclear industry and related bodies, including regulatory authorities, environmental and energy scientists, students, researchers and consultants.
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* Covers all plant components and potential sources of risk including human, technical and natural factors
* Brings together information on nuclear safety for which the reader would previously have to consult many different and expensive sources
* Provides international design and safety criteria and an overview of regulatory regimes
* Includes case studies and analysis of major accidents with data and calculations on accompanying website
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