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Automation Of Spectral Analysis Of Surface Waves Method
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Book Synopsis Automation of Spectral Analysis of Surface Waves Method by : S. Nazarian
Download or read book Automation of Spectral Analysis of Surface Waves Method written by S. Nazarian and published by . This book was released on 1994 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: With minimal simplifying assumptions and approximations, an automated version of the spectral analysis of surface waves (SASW) method has been developed to determine in situ shear wave velocity profiles of soil deposits. Testing time for each site, including collection of data, construction and inversion of dispersion curve, should not be more than thirty minutes. To accelerate field testing, a multi-sensor geophone array and a PC-based data-acquisition, signal-analysis package have been developed. The two greatest challenges have been the development of a fully-automated procedure to construct the dispersion curve from field data and a fast yet, theoretically-sound, inversion process to determine the shear wave velocity profile from a given dispersion curve. In this paper, the major theoretical and practical aspects of these two steps are described and discussed with examples.
Book Synopsis Experimental study of applying the spectral analysis of surface waves method offshore by : Robert C. Gauer
Download or read book Experimental study of applying the spectral analysis of surface waves method offshore written by Robert C. Gauer and published by . This book was released on 1990 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Geotechnical Testing II by : Ronald J. Ebelhar
Download or read book Dynamic Geotechnical Testing II written by Ronald J. Ebelhar and published by ASTM International. This book was released on 1994 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applications and limitations of the spectral-analysis-of-surface-waves method by : Jiun-Chyuan Sheu
Download or read book Applications and limitations of the spectral-analysis-of-surface-waves method written by Jiun-Chyuan Sheu and published by . This book was released on 1987 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of the Spectral-Analysis-of-Body-Waves (SABW) Method for Downhole Seismic Testing with Boreholes Or Penetrometers by : Changyoung Kim
Download or read book Development of the Spectral-Analysis-of-Body-Waves (SABW) Method for Downhole Seismic Testing with Boreholes Or Penetrometers written by Changyoung Kim and published by . This book was released on 2012 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Downhole seismic testing and seismic cone penetration testing (SCPT) have shown little change since the 1990s, with essentially the same sensors, sources, test procedures and analytical methods being used. In these tests, the time differences of first-arrivals or other reference points early in the time-domain signals have been used to calculate shear and compression wave velocities in soil and rock layers. This time-domain method requires an operator to pick the first arrival or other reference point of each seismic wave in the time record. Picking these reference points correctly is critical in calculating wave velocities. However, picking these points in time records is time consuming and is not always easy because of low signal-to-noise ratios, especially in the case of shear waves which arrive later in the time record. To avoid picking reference points, a cross-correlation method is sometimes applied to determine travel times of the seismic waves, especially in traditional downhole testing. One benefit of the cross-correlation method is that it can be automated. The cross-correlation method is not, however, appropriate for evaluation other body wave characteristics such as wave dispersion and material damping. An alternate approach is to use frequency-domain analysis methods which are well suited for evaluating time changes between all types of waveforms measured at spatially different points. In addition, frequency-domain methods can be automated and attenuation measurements can also be performed. Examples of such testing procedures with Rayleigh-type surface waves in geotechnical earthquake engineering are the Spectral-Analysis-of-Surface-Waves (SASW) and Multi-Channel-Analysis-of-Surface-Waves (MASW) methods. In this research, an automated procedure for calculating body wave velocities that is based on frequency-domain analysis is presented. The basis for and an automated procedure to calculated body wave dispersion is also presented. Example results showing shear wave velocity and material damping measurements in the SCPT are presented. The objective of this study is to improve downhole seismic tests with boreholes, cone penetrometers or flat-plate dilatometers by developing a frequency-domain analysis method which overcomes many of the disadvantages of time-domain analyses. The frequency-domain method is called the Spectral-Analysis-of-Body-Waves (SABW) method. The SABW method does not require an operator to pick the first-arrival or other reference times. As a result, the shear wave velocities and wave dispersion can be calculated in real time using the interpretation method with an automatic calculation procedure, thus reducing human subjectivity. Also, the SABW method can be used to determine additional information from the dispersion curves such as the material damping ratio and an estimate of soil type based on the dispersion relationship. In this research, field SCPT measurements are presented as an example to illustrate the potential of the SABW method. Measurements with shear waves are highlighted because these measurements are most often required in geotechnical earthquake engineering studies.
Book Synopsis Nondestructive and Automated Testing for Soil and Rock Properties by : W. Allen Marr
Download or read book Nondestructive and Automated Testing for Soil and Rock Properties written by W. Allen Marr and published by ASTM International. This book was released on 1999 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Wave Methods for Near-Surface Site Characterization by : Sebastiano Foti
Download or read book Surface Wave Methods for Near-Surface Site Characterization written by Sebastiano Foti and published by CRC Press. This book was released on 2014-08-21 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Develop a Greater Understanding of How and Why Surface Wave Testing Works Using examples and case studies directly drawn from the authors’ experience, Surface Wave Methods for Near-Surface Site Characterization addresses both the experimental and theoretical aspects of surface wave propagation in both forward and inverse modeling. This book accents the key facets associated with surface wave testing for near-surface site characterization. It clearly outlines the basic principles, the theoretical framework and the practical implementation of surface wave analysis. In addition, it also describes in detail the equipment and measuring devices, acquisition techniques, signal processing, forward and inverse modeling theories, and testing protocols that form the basis of modern surface wave techniques. Review Examples of Typical Applications for This Geophysical Technique Divided into eight chapters, the book explains surface wave testing principles from data measurement to interpretation. It effectively integrates several examples and case studies illustrating how different ground conditions and geological settings may influence the interpretation of data measurements. The authors accurately describe each phase of testing in addition to the guidelines for correctly performing and interpreting results. They present variants of the test within a consistent framework to facilitate comparisons, and include an in-depth discussion of the uncertainties arising at each stage of surface wave testing. Provides a comprehensive and in-depth treatment of all the steps involved in surface wave testing Discusses surface wave methods and their applications in various geotechnical conditions and geological settings Explains how surface wave measurements can be used to estimate both stiffness and dissipative properties of the ground Addresses the issue of uncertainty, which is often an overlooked problem in surface wave testing Includes examples with comparative analysis using different processing techniques and inversion algorithms Outlines advanced applications of surface wave testing such as joint inversion, underwater investigation, and Love wave analysis Written for geotechnical engineers, engineering seismologists, geophysicists, and researchers, Surface Wave Methods for Near-Surface Site Characterization offers practical guidance, and presents a thorough understanding of the basic concepts.
Book Synopsis Numerical and Optimization Techniques Applied to Spectral-analysis-of-surface-waves Method for in Situ Determination of Elastic Layer Moduli by : M. Makbul Hossain
Download or read book Numerical and Optimization Techniques Applied to Spectral-analysis-of-surface-waves Method for in Situ Determination of Elastic Layer Moduli written by M. Makbul Hossain and published by . This book was released on 1990 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Waves in Geomechanics: Direct and Inverse Modelling for Soils and Rocks by : Carlo G. Lai
Download or read book Surface Waves in Geomechanics: Direct and Inverse Modelling for Soils and Rocks written by Carlo G. Lai and published by Springer Science & Business Media. This book was released on 2007-03-23 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theories of surface waves develop since the end of XIX century and many fundamental problems like existence, phase and group velocities, attenuation (quality factor), mode conversion, etc. have been, in part successfully, solved within the framework of such simple models as ideal fluids^ or linear elasticity. However, a sufficiently complete presentation of this subject, particularly for solids, is still missing in the literature. The sole exception is the book of I. A. Viktorov^ which contains an extensive discussion of fundamental properties of surface waves in homogeneous and stratified linear elastic solids with particular emphasis on contributions of Russian scientists. Unfortunately, the book has never been translated to English and its Russian version is also hardly available. Practical applications of surface waves develop intensively since a much shorter period of time than theories even though the motivation of discoverers of surface waves such as Lord Rayleigh stems from their appearance in geophysics and seismology. Nowadays the growing interest in practical applications of surface waves stem from the following two main factors: surface waves are ideal for developing relatively cheap and convenient methods of nondestructive testing of various systems spanning from nanomaterials (e.g.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States-Japan Cooperative Program in Natural Resources. Panel on Wind and Seismic Effects. Joint Meeting Publisher : ISBN 13 : Total Pages :736 pages Book Rating :4.:/5 (318 download)
Book Synopsis Wind and Seismic Effects by : United States-Japan Cooperative Program in Natural Resources. Panel on Wind and Seismic Effects. Joint Meeting
Download or read book Wind and Seismic Effects written by United States-Japan Cooperative Program in Natural Resources. Panel on Wind and Seismic Effects. Joint Meeting and published by . This book was released on 1994 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bearing Capacity Of Roads Volume 1 by : A. Gomes Correia
Download or read book Bearing Capacity Of Roads Volume 1 written by A. Gomes Correia and published by CRC Press. This book was released on 2022-01-27 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an outcome of the sixth conference on bearing capacity of roads and airfield held in Lisbon, Portugal. It focuses on railway tracks and covers following topics: bearing capacity policies, concepts, costs and condition surveys; analysis and modelling; design and environmental effects.
Book Synopsis Craig's Soil Mechanics by : Jonathan Knappett
Download or read book Craig's Soil Mechanics written by Jonathan Knappett and published by CRC Press. This book was released on 2019-10-11 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Craig’s Soil Mechanics continues to evolve and remain the definitive text for civil engineering students worldwide. It covers fundamental soil mechanics and its application in applied geotechnical engineering from A to Z and at the right depth for an undergraduate civil engineer, with sufficient extension material for supporting MSc level courses, and with practical examples and digital tools to make it a useful reference work for practising engineers. This new edition now includes: Restructured chapters on foundations and earthworks, the latter including new material on working platforms and collapse of underground cavities (sinkhole formation). New mobilised-stress-based deformation methods that can straightforwardly be used with both linear and non-linear soil stiffness models and field measurements of shear wave velocity, for serviceability limit state design. Extended sets of correlations for making sensible first estimates of soil parameters, adding deformation-based parameters for broader coverage than the Eighth Edition. Extended section on robust statistical selection of characteristic soil parameters. Greater use of consolidation theory throughout in determining whether actions, processes and laboratory/in-situ tests are drained or undrained. Extended chapter on in-situ testing, adding the Flat Dilatometer Test (DMT), and interpretation of consolidation parameters from CPTU and DMT testing. An updated section on pile load testing. Additional worked examples and end-of-chapter problems covering new material, with fully worked solutions for lecturers. The electronic resources on the book’s companion website are developed further, with the addition of two new spreadsheet numerical analysis tools and improvement of existing tools from the Eighth Edition. Using these, readers can take real soil test data, interpret its mechanical properties and apply these to a range of common geotechnical design problems at ultimate and serviceability limiting states.
Book Synopsis Infrastructure Management, Assessment and Rehabilitation by : Sherif Yehia
Download or read book Infrastructure Management, Assessment and Rehabilitation written by Sherif Yehia and published by Cambridge Scholars Publishing. This book was released on 2021-11-30 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together state-of-the-art research on the development of infrastructure management, assessment, and rehabilitation techniques. It sheds light on pioneering work on innovative 3D-printed concrete, novel methods for assessment of bridge decks, and advanced computer vision-based maintenance of civil infrastructure. The book is essential reading for infrastructure owners, engineers, and contractors, allowing them to gain insights into groundbreaking research that is paving the way toward sustainable and resilient infrastructure.
Book Synopsis Advancement in the Design and Performance of Sustainable Asphalt Pavements by : Louay Mohammad
Download or read book Advancement in the Design and Performance of Sustainable Asphalt Pavements written by Louay Mohammad and published by Springer. This book was released on 2017-07-11 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume on “Advancement in the Design and Performance of Sustainable Asphalt Pavements” includes a collection of research and practical papers from an international research and technology activities on Mixture Design Innovation, Structural Pavement Design, Advancement in Production and Construction, Climate Changes and Effects on Infrastructure, Green Energy, Technology and Integration. The volume constitutes an important contribution in view of the urgent need to develop materials, designs, and practices to ensure the sustainability of transportation infrastructure. This volume is part of the proceedings of the 1st GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2017.
Book Synopsis Generation of Low Frequency Rayleigh Waves for the Spectral-analysis-of-surface-waves Method by : Nenad Gucunoski
Download or read book Generation of Low Frequency Rayleigh Waves for the Spectral-analysis-of-surface-waves Method written by Nenad Gucunoski and published by . This book was released on 1994 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Surface Waves in a Laterally Inhomogeneous Earth by : V.I. Keilis-Borok
Download or read book Seismic Surface Waves in a Laterally Inhomogeneous Earth written by V.I. Keilis-Borok and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface waves form the longest and strongest portion of a seismic record excited by explosions and shallow earthquakes. Traversing areas with diverse geologic structures, they 'absorb' information on the properties of these areas which is best retlected in dispersion, the dependence of velocity on frequency. The other prop erties of these waves - polarization, frequency content, attenuation, azimuthal variation of the amplitude and phase - arc also controlled by the medium between the source and the recording station; some of these are affected by the properties of the source itself and by the conditions around it. In recent years surface wave seismology has become an indispensable part of seismological practice. The maximum amplitude in the surface wave train of virtually every earthquake or major explosion is being measured and used by all national and international seismological surveys in the determination of the most important energy parameter of a seismic source, namely, the magnitude M,. The relationship between M, and the body wave magnitude fI1t, is routinely employed in identification of underground nuclear explosions. Surface waves of hundreds of earthquakes recorded every year are being analysed to estimate the seismic moment tensor of earthquake sources, to determine the periods of free oscillations of the Earth, to construct regional dispersion curves from which in turn the crustal and upper mantle structure in various areas is derived, and to evaluate the dissipative parameters of the mantle material.
