Analysis of Microtremors for Determination of Site Effects

Analysis of Microtremors for Determination of Site Effects
Author: Tun Naing
Publisher: LAP Lambert Academic Publishing
Total Pages: 204
Release: 2012-04
Genre:
ISBN: 9783848488872

Microtremor survey was conducted together with boring survey for the determination of site amplification and strong ground motion characteristics in southern Yogyakarta Depression, Indonesia. 1-D dynamic response analysis by equivalent linear method had been performed based on results of microtremors survey, data from nine boreholes, and standard penetration test results. The DYNEQ Program, version 3.25, coded by Dr. Nozomu Yoshida in 2004 was used for 1D dynamic response analysis by combining with Bunsanf - HV - Matsuo Program. 1-D seismic response analysis had been performed by using the input parameters such as shear wave velocity structures, sediment properties, depth information and two input earthquake motions at engineering bedrock; selected earthquake motion (2004 Kamo earthquake, Max Acc. 232 gals) and synthetic earthquake motion of 2006 Yogyakarta earthquake. The amplification map, two predominant period maps, two peak ground acceleration (PGA) maps, a peak ground velocity (PGV) map and a peak ground displacement (PGD) map are resulted as main contributions.

The Microtremor Survey Method

The Microtremor Survey Method
Author: Hiroshi Okada
Publisher: SEG Books
Total Pages: 150
Release: 2003
Genre: Science
ISBN: 1560801204

Describes the nature of the microtremor noise field, the use of appropriate surface arrays of geophones, and the two principal classes of array-processing techniques, high-resolution beamforming and the spatial autocorrelation method (SPAC). This is the first comprehensive textbook of the microtremor survey method written in English.

Recent Advances in Earthquake Geotechnical Engineering and Microzonation

Recent Advances in Earthquake Geotechnical Engineering and Microzonation
Author: Atilla Ansal
Publisher: Springer Science & Business Media
Total Pages: 362
Release: 2006-04-11
Genre: Science
ISBN: 1402025289

Outstanding advances have been achieved on Earthquake Geotechnical Engineering and Microzonation in the last decade mostly due to the increase in the recorded instrumental in-situ data and large number of case studies conducted in analyzing the observed effects during the recent major earthquakes. During the 15th International Conference on Soil Mechanics and Geotechnical Engineering held in Istanbul in August 2001, the Technical Committee of Earthquake Geotechnical Engineering, (TC4) of the International Society of Soil Mechanics and Geotechnical Engineering organised a regional seminar on Geotechnical Earthquake Engineering and Microzonation where an effort has been made to present the recent advances in the field by eminent scientists and researchers. The book idea was first suggested by the participants of this seminar. The purpose of this book as well as of the seminar was to present the broad spectrum of earthquake geotechnical engineering and seismic microzonation including strong ground motion, site characterisation, site effects, liquefaction, seismic microzonation, solid waste landfills and foundation engineering. The subject matter requires multidisciplinary input from different fields of engineering seismology, soil dynamics, geotechnical and structural engineering. The chapters in this book are prepared by some of the distinguished lecturers who took part in the seminar supplemented with contributions of few distinguished experts in the field of earthquake geotechnical engineering. The editor would like to express his gratitude to all authors for their interest and efforts in preparing their manuscripts. Without their enthusiasm and support, it would not have been possible to complete this book.

Increasing Seismic Safety by Combining Engineering Technologies and Seismological Data

Increasing Seismic Safety by Combining Engineering Technologies and Seismological Data
Author: Marco Mucciarelli
Publisher: Springer Science & Business Media
Total Pages: 386
Release: 2008-11-30
Genre: Science
ISBN: 1402091966

The current state-of-the-art allows seismologists to give statistical estimates of the probability of a large earthquake striking a given region, identifying the areas in which the seismic hazard is the highest. However, the usefulness of these estimates is limited, without information about local subsoil conditions and the vulnerability of buildings. Identifying the sites where a local ampli?cation of seismic shaking will occur, and identifying the buildings that will be the weakest under the seismic shaking is the only strategy that allows effective defence against earthquake damage at an affordable cost, by applying selective reinforcement only to the structures that need it. Unfortunately, too often the Earth’s surface acted as a divide between seism- ogists and engineers. Now it is becoming clear that the building behaviour largely depends on the seismic input and the buildings on their turn act as seismic sources, in an intricate interplay that non-linear phenomena make even more complex. These phenomena are often the cause of observed damage enhancement during past ear- quakes. While research may pursue complex models to fully understand soil dyn- ics under seismic loading, we need, at the same time, simple models valid on average, whose results can be easily transferred to end users without prohibitive expenditure. Very complex models require a large amount of data that can only be obtained at a very high cost or may be impossible to get at all.

The Effects of Surface Geology on Seismic Motion

The Effects of Surface Geology on Seismic Motion
Author: Kojiro Irikura
Publisher: CRC Press
Total Pages: 380
Release: 1999
Genre: Science
ISBN:

This volume of conference proceedings provides coverage of topics such as: weak motion effects; estimation of site effects using microtremors; nonlinear ground response; topographic effects; attenuation relations; seismic zonation; and simultaneous simulation for Kobe.

Surface Wave Analysis for Near Surface Applications

Surface Wave Analysis for Near Surface Applications
Author: Giancarlo Dal Moro
Publisher: Elsevier
Total Pages: 253
Release: 2014-11-04
Genre: Science
ISBN: 0128011408

Seismic Wave Analysis for Near Surface Applications presents the foundational tools necessary to properly analyze surface waves acquired according to both active and passive techniques. Applications range from seismic hazard studies, geotechnical surveys and the exploration of extra-terrestrial bodies. Surface waves have become critical to near-surface geophysics both for geotechnical goals and seismic-hazard studies. Included in this book are the related theories, approaches and applications which the lead editor has assembled from a range of authored contributions carefully selected from the latest developments in research. A unique blend of theory and practice, the book’s concepts are based on exhaustive field research conducted over the past decade from the world’s leading seismologists and geophysicists. Edited by a geophysicist with nearly 20 years of experience in research, consulting, and geoscience software development Nearly 100 figures, photographs, and examples aid in the understanding of fundamental concepts and techniques Presents the latest research in seismic wave characteristics and analysis, the fundamentals of signal processing, wave data acquisition and inversion, and the latest developments in horizontal-to-vertical spectral ratio (HVSR) Each chapter features a real-world case study—13 in all—to bring the book’s key principles to life

Engineering Seismology, Geotechnical and Structural Earthquake Engineering

Engineering Seismology, Geotechnical and Structural Earthquake Engineering
Author: Sebastiano D'Amico
Publisher: BoD – Books on Demand
Total Pages: 312
Release: 2013-03-20
Genre: Science
ISBN: 9535110381

The mitigation of earthquake-related hazards represents a key role in the modern society. The mitigation of such kind of hazards spans from detailed studies on seismicity, evaluation of site effects, and seismo-induced landslides, tsunamis as well as and the design and analysis of structures to resist such actions. The study of earthquakes ties together science, technology and expertise in infrastructure and engineering in an effort to minimize human and material losses when they inevitably occur. Chapters deal with different topics aiming to mitigate geo-hazards such as: Seismic hazard analysis, Ground investigation for seismic design, Seismic design, assessment and remediation, Earthquake site response analysis and soil-structure interaction analysis.

Measuring, Modeling and Predicting the Seismic Site Effect

Measuring, Modeling and Predicting the Seismic Site Effect
Author: Yefei Ren
Publisher: Frontiers Media SA
Total Pages: 297
Release: 2024-01-25
Genre: Science
ISBN: 2832540090

As recognized universally by both seismology and earthquake engineering communities, the amplitude and frequency content of ground motions are influenced by local site effects, including the effects of near-surface geologic materials, surface topographic and basin effects, and so on. Strong linkage between seismic site effect and earthquake damage has been commonly demonstrated from many past earthquakes. Therefore, quantitative and reliable evaluation of the seismic site effect is one of the crucial aspects in seismic hazard assessment and risk mitigation. With the significant advancement of modern seismic monitoring networks and arrays, huge amounts of high-quality seismic records are now being accumulated. This encourages us to measure the site responses and its associated uncertainty for selected seismic stations by some record-dependent approaches, such as horizontal-to-vertical spectral ratio (HVSR) measurements, generalized spectral inversion (GIT) methods, etc. Machine learning techniques also show significant promise in characterization of the near-surface geologic properties and prediction of site response. These data-driven approaches help us to better understand the physics of spatial and temporal variabilities of ground motions. Due to more and more site-specific data being captured, invoking non-ergodic assumptions in seismic response analysis has recently been a topic of great interest in the community. For specific site response analysis, numerical simulations are carried out to model the dynamic process of seismic waves propagating and scattering in the subsurface strata. With development of modeling capacity, great efforts have been taken to evaluate quantitatively the complex 2D and 3D effects on seismic site response.

Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions

Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions
Author: Amjad Kallel
Publisher: Springer
Total Pages: 1761
Release: 2017-12-12
Genre: Science
ISBN: 3319705482

This volume includes the papers presented during the 1st Euro-Mediterranean Conference for Environmental Integration (EMCEI) which was held in Sousse, Tunisia in November 2017. This conference was jointly organized by the editorial office of the Euro-Mediterranean Journal for Environmental Integration in Sfax, Tunisia and Springer (MENA Publishing Program) in Germany. It aimed to give a more concrete expression to the Euro-Mediterranean integration process by supplementing existing North-South programs and agreements with a new multilateral scientific forum that emphasizes in particular the vulnerability and proactive remediation of the Euro-Mediterranean region from an environmental point of view. This volume gives a general and brief overview on current research focusing on emerging environmental issues and challenges and its applications to a variety of problems in the Euro-Mediterranean zone and surrounding regions. It contains over five hundred and eighty carefully refereed short contributions to the conference. Topics covered include (1) innovative approaches and methods for environmental sustainability, (2) environmental risk assessment, bioremediation, ecotoxicology, and environmental safety, (3) water resources assessment, planning, protection, and management, (4) environmental engineering and management, (5) natural resources: characterization, assessment, management, and valorization, (6) intelligent techniques in renewable energy (biomass, wind, waste, solar), (7) sustainable management of marine environment and coastal areas, (8) remote sensing and GIS for geo-environmental investigations, (9) environmental impacts of geo/natural hazards (earthquakes, landslides, volcanic, and marine hazards), and (10) the environmental health science (natural and social impacts on Human health). Presenting a wide range of topics and new results, this edited volume will appeal to anyone working in the subject area, including researchers and students interested to learn more about new advances in environmental research initiatives in view of the ever growing environmental degradation in the Euro-Mediterranean region, which has turned environmental and resource protection into an increasingly important issue hampering sustainable development and social welfare.