Fault Zone Damage, Nonlinear Site Response, and Dynamic Triggering Associated with Seismic Waves PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Fault Zone Damage, Nonlinear Site Response, and Dynamic Triggering Associated with Seismic Waves PDF full book. Access full book title Fault Zone Damage, Nonlinear Site Response, and Dynamic Triggering Associated with Seismic Waves by Chunquan Wu. Download full books in PDF and EPUB format.
Author: Chunquan Wu
Publisher:
ISBN:
Category : Earthquake aftershocks
Languages : en
Pages :
Get Book Here
Book Description
My dissertation focuses primarily on the following three aspects associated with passing seismic waves in the field of earthquake seismology: temporal changes of fault zone properties, nonlinear site response, and dynamic triggering. : Quantifying the temporal changes of material properties within and around active fault zones (FZ) is important for better understanding of rock rheology and estimating the strong ground motion that can be generated by large earthquakes. As high-amplitude seismic waves propagate through damaged FZ rocks and/or shallow surface layers, they may produce additional damage leading to nonlinear wave propagation effects and temporal changes of material properties (e.g., seismic velocity, attenuation). Previous studies have found several types of temporal changes in material properties with time scales of tens of seconds to several years. Here I systematically analyze temporal changes of fault zone (FZ) site response along the Karadere-D©3¡2©2℗ơzce branch of the North Anatolian fault that ruptured during the 1999 İzmit and Düzce earthquake sequences. The coseismic changes are on the order of 20-40%, and are followed by a logarithmic recovery over an apparent time scale of ~1 day. These results provide a bridge between the large-amplitude near-instantaneous changes and the lower-amplitude longer-duration variations observed in previous studies. The temporal changes measured from this high-resolution spectral ratio analysis also provide a refinement for the beginning of the longer more gradual process typically observed by analyzing repeating earthquakes.
Author: Chunquan Wu
Publisher:
ISBN:
Category : Earthquake aftershocks
Languages : en
Pages :
Get Book Here
Book Description
My dissertation focuses primarily on the following three aspects associated with passing seismic waves in the field of earthquake seismology: temporal changes of fault zone properties, nonlinear site response, and dynamic triggering. : Quantifying the temporal changes of material properties within and around active fault zones (FZ) is important for better understanding of rock rheology and estimating the strong ground motion that can be generated by large earthquakes. As high-amplitude seismic waves propagate through damaged FZ rocks and/or shallow surface layers, they may produce additional damage leading to nonlinear wave propagation effects and temporal changes of material properties (e.g., seismic velocity, attenuation). Previous studies have found several types of temporal changes in material properties with time scales of tens of seconds to several years. Here I systematically analyze temporal changes of fault zone (FZ) site response along the Karadere-D©3¡2©2℗ơzce branch of the North Anatolian fault that ruptured during the 1999 İzmit and Düzce earthquake sequences. The coseismic changes are on the order of 20-40%, and are followed by a logarithmic recovery over an apparent time scale of ~1 day. These results provide a bridge between the large-amplitude near-instantaneous changes and the lower-amplitude longer-duration variations observed in previous studies. The temporal changes measured from this high-resolution spectral ratio analysis also provide a refinement for the beginning of the longer more gradual process typically observed by analyzing repeating earthquakes.
Author: Yong-Gang Li
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110542684
Category : Science
Languages : en
Pages : 406
Get Book Here
Book Description
The book covers multi-disciplinary topics in observational, computational and applied geophysics in aspects of solid earth system. The authors provide an up-to-date overview for methods and techniques in seismology, with a focus on fault structure, strong ground motion and earthquake forecast based on full-3D earth structure models. Abundant of case studies make it a practical reference for researchers in seismology and applied geophysics.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309065623
Category : Science
Languages : en
Pages : 431
Get Book Here
Book Description
The destructive force of earthquakes has stimulated human inquiry since ancient times, yet the scientific study of earthquakes is a surprisingly recent endeavor. Instrumental recordings of earthquakes were not made until the second half of the 19th century, and the primary mechanism for generating seismic waves was not identified until the beginning of the 20th century. From this recent start, a range of laboratory, field, and theoretical investigations have developed into a vigorous new discipline: the science of earthquakes. As a basic science, it provides a comprehensive understanding of earthquake behavior and related phenomena in the Earth and other terrestrial planets. As an applied science, it provides a knowledge base of great practical value for a global society whose infrastructure is built on the Earth's active crust. This book describes the growth and origins of earthquake science and identifies research and data collection efforts that will strengthen the scientific and social contributions of this exciting new discipline.
Author: Yefei Ren
Publisher: Frontiers Media SA
ISBN: 2832540090
Category : Science
Languages : en
Pages : 297
Get Book Here
Book Description
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.
Author: Marion Y. Thomas
Publisher: John Wiley & Sons
ISBN: 1119156882
Category : Science
Languages : en
Pages : 306
Get Book Here
Book Description
Earthquakes are some of the most dynamic features of the Earth. This multidisciplinary volume presents an overview of earthquake processes and properties including the physics of dynamic faulting, fault fabric and mechanics, physical and chemical properties of fault zones, dynamic rupture processes, and numerical modeling of fault zones during seismic rupture. This volume examines questions such as: • What are the dynamic processes recorded in fault gouge? • What can we learn about rupture dynamics from laboratory experiments? • How do on-fault and off-fault properties affect seismic ruptures? • How do fault zones evolve over time? Fault Zone Dynamic Processes: Evolution of Fault Properties During Seismic Rupture is a valuable resource for scientists, researchers and students from across the geosciences interested in the earthquakes processes.
Author: T. G. Sitharam
Publisher: Springer
ISBN: 3319896598
Category : Science
Languages : en
Pages : 202
Get Book Here
Book Description
This book reviews and assesses the various methodologies for site characterization and site effect estimation to carry out seismic zonation at micro and macro levels. Readers will learn about the suitability of these methodologies for each level of zoning that needs to be assessed in order to optimize the resources for carrying out seismic zonation. The Indian sub-continent is highly vulnerable to earthquake hazards, and past studies have focused primarily on the Himalayan region (inter-plate zone) and the northeast region (subduction zone). The book improves understanding of the Peninsular India that also has significantly high seismicity and is prone to earthquakes of sizeable magnitude. Particular attention is given to the various methodologies for assessing seismic hazards, the scales at which site characterizations are carried out, and optimal methods for zonation practices using site data and hazard indexes. Aimed at students, this book will be of use to post-graduates and doctoral students researching seismic zonation, hazard assessment and mitigation, and spatial data in earth sciences.
Author: Walter Salazar
Publisher: BoD – Books on Demand
ISBN: 0854662219
Category : Science
Languages : en
Pages : 238
Get Book Here
Book Description
Earthquake Ground Motion is a compilation of ten chapters covering tectonics, seismicity, site effects, tsunamis, infrastructure, and instrumentation. It presents state-of-the-art techniques for retrieving rupture models, seismogenic structures, and validation of focal mechanisms. It also presents macroseismic archiving tools for historical and instrumental earthquakes and the fundamentals of seismic tomography. The book describes the site response analysis in 2D and 3D, considering topographic and soil structure interactions, its incorporation in a seismic hazard analysis, and the impact of earthquakes on the cost of reconstruction. The final sections are devoted to the genesis of earthquakes tsunamis, non-seismic tsunamis, and the new role of gyroscopes in rotational seismology.
Author: Carolina Volpini
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Earthquake engineering aims to design and analyse structures to avoid damage in minor earthquakes and to prevent collapse in major earthquakes. An important aspect of assessing the ground motions that could occur at the basis of a structure is how the seismic waves will be affected by travelling through soil deposits near the surface. In fact, these near-surface layers act as a filter modifying (amplify/de-amplify) the input motion and leading to modified ground motions at the ground surface. Hence, the study of the effect of these near-surface layers on seismic waves is important for earthquake engineers designing and analysing structures in earthquake-prone regions.The main issues connected with assessing earthquake ground motions are the uncertainties connected with many aspects of this phenomenon: from the knowledge of the fault rupture generating the seismic waves, through the overall travel path of these waves, to the modification of the waves near the surface. In this work, I concentrate my attention on the uncertainties connected with the near-surface soil deposits. In particular, I focus on aspects of site response analysis, i.e. the modelling of the modulation of seismic waves by soil deposits. The main goal of the thesis is to improve site response analysis for "non-standard" sites, which are those for which the general assumptions of shallow (
Author: Yehuda Ben-Zion
Publisher: Springer Science & Business Media
ISBN: 3034601387
Category : Science
Languages : en
Pages : 375
Get Book Here
Book Description
Considerable progress has been made recently in quantifying geometrical and physical properties of fault surfaces and adjacent fractured and granulated damage zones in active faulting environments. There has also been significant progress in developing rheologies and computational frameworks that can model the dynamics of fault zone processes. This volume provides state-of-the-art theoretical and observational results on the mechanics, structure and evolution of fault zones. Subjects discussed include damage rheologies, development of instabilities, fracture and friction, dynamic rupture experiments, and analyses of earthquake and fault zone data.
Author: Eiichi Fukuyama
Publisher: Academic Press
ISBN: 0080922465
Category : Science
Languages : en
Pages : 333
Get Book Here
Book Description
The dynamics of the earthquake rupture process are closely related to fault zone properties which the authors have intensively investigated by various observations in the field as well as by laboratory experiments. These include geological investigation of the active and fossil faults, physical and chemical features obtained by the laboratory experiments, as well as the seismological estimation from seismic waveforms. Earthquake dynamic rupture can now be modeled using numerical simulations on the basis of field and laboratory observations, which should be very useful for understanding earthquake rupture dynamics. Features: * First overview of new and improved techniques in the study of earthquake faulting * Broad coverage * Full color Benefits: * A must-have for all geophysicists who work on earthquake dynamics * Single resource for all aspects of earthquake dynamics (from lab measurements to seismological observations to numerical modelling) * Bridges the disciplines of seismology, structural geology and rock mechanics * Helps readers to understand and interpret graphs and maps Also has potential use as a supplementary resource for upper division and graduate geophysics courses.
