Download or read book Probabilistic Seismic Hazard Assessment Including Site Effects for Evansville Indiana and the Surrounding Region written by Jennifer S. Haase and published by . This book was released on 2011 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Probabilistic Seismic Hazard Assessment written by Hing-Ho Tsang and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Probabilistic Seismic Hazard Assessment: Direct Amplitude-based Approach" by Hing-ho, Tsang, 曾慶豪, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled "Probabilistic Seismic Hazard Assessment: Direct Amplitude-Based Approach" Submitted by TSANG HING HO for the degree of Doctor of Philosophy at The University of Hong Kong in June 2006 Conventional Probabilistic Seismic Hazard Assessment (PSHA) is difficult to apply in regions whose geological setting (including the location of active faults) is only imperfectly known. Also, for a site-specific PSHA, site effects arising from both crustal rock and overlying soil sediments are generally not assessed rigorously. This thesis demonstrates an alternative procedure for assessing seismic hazard, developed from the conventional Cornell-McGuire PSHA approach, based on considering an infinite number of sources. The proposed new procedure is termed the Direct Amplitude-Based (DAB) approach. A generic analytical solution for the proposed procedure has also been derived in this study, to avoid the need for a lengthy integration process. A site-specific ground motion attenuation model is an important element in seismic hazard assessment. Seismic attenuation behaviour is controlled by a number of wave modification mechanisms, some of which have characteristic specific to a local area or a particular site, while others can be generalised to the entire seismic region. The local seismological parameters include a crustal shear wave velocity (SWV) profile. A comprehensive methodology for modelling the SWV profile in crustal rock has been developed, enabling the amplification mechanisms in the transmission of seismic waves to be estimated. The κ parameter, which characterizes the extent of the near-surface attenuation mechanism in crustal rock, has also been investigated. Empirical correlations of κ with near-surface SWV parameters in crustal rock have been developed. This new modelling approach allows much better seismic hazard assessments to be conducted in regions of low and moderate seismicity. Site effects characterise the filtering mechanisms within the soil sedimentary layers overlying bedrock. A simple, heuristic manual procedure to calculate site amplification factor, site period shift factor and soil damping ratio has been developed. Displacement response spectra (RSD) can then be constructed for soil sites. The proposed model can take into account the nonlinear behaviour of soil that is dependent on the level of shaking, impedance contrast at the soil-bedrock interface and the plasticity of soil materials. Lastly, a case study was carried out, using Hong Kong as an example. SWV information for the four prevalent geological formations found in Hong Kong was first obtained, so as to evaluate the localised near-surface wave modification factors. A ground motion attenuation model was then developed by combining the near-surface modification factors with the regional source function of intra-plate earthquakes. Whilst the ground motion attenuation model was developed, PSHA was performed using the proposed DAB approach. Response spectral values were computed for the whole period range of engineering interest, to form a set of uniform hazard spectra for rock sites in Hong Kong. Site-specific RSD were then constructed for two representative soil and reclamation sites from different parts of Hong Kong. This case study also dealt with the estimation of the lateral building periods. By combining the period estimates with the seismic hazard mode

Download or read book A Comprehensive Site Specific Probabilistic Seismic Hazard Analysis for a Liquid Natural Gas Tank Located in the Gulf Coast Region written by Alireza Haji Soltani and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation includes three major components. First, ratios between median values and the associated standard deviations for different definitions of the horizontal component of ground motions in Central and Eastern North America are developed using a subset of the NGA-East database. While the most recent studies produced similar results using different subsets of the NGA-West2 database, it is possible that such directionality results may differ for other earthquake datasets and be region specific. The computed median ratios are similar to the ratios provided in recent studies for other regions with a shift in some period ranges with noticeable differences between the standard deviations. Second, a comparison of a hybrid approach and a fully probabilistic approach for incorporating site effects into a probabilistic seismic hazard analysis (PSHA) is presented. In the employed hybrid approach the amplification factors are computed by performing equivalent linear site response analysis. The considered fully probabilistic approach is characterized by higher levels of sophistication in which the rock hazard is convolved with the probability density function of the amplification functions to calculate the surface ground motions. The uncertainties associated with the site characterization is addressed via Monte Carlo randomizations. To fulfill the scope of this study, the employed approaches is highlighted focusing on performing a site-specific PSHA for a Liquid Natural Gas tank located in the Gulf Coast region. Finally, a new ground motion prediction model is developed for the response spectral ratio of vertical-to-horizontal (V/H) components of earthquakes for the Gulf Coast region. The proposed V/H ratio model has the advantage of considering the magnitude, source to site distance, and the shear-wave velocity of soil deposits in the upper 30 m of the site (Vs30) for the peak ground acceleration (PGA), and a wide range of spectral periods. The model is based on a comprehensive set of regression analyses of the newly compiled NGA-East database of available recordings with the moment magnitudes M ≥ 3.4 and the rupture distances RRup

Download or read book Safety Reliability Risk and Life Cycle Performance of Structures and Infrastructures written by George Deodatis and published by CRC Press. This book was released on 2014-02-10 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures contains the plenary lectures and papers presented at the 11th International Conference on STRUCTURAL SAFETY AND RELIABILITY (ICOSSAR2013, New York, NY, USA, 16-20 June 2013), and covers major aspects of safety, reliability, risk and life-cycle performance of str

Download or read book Earthquake Engineering and Structural Dynamics in Memory of Ragnar Sigbj rnsson written by Rajesh Rupakhety and published by Springer. This book was released on 2017-12-07 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents methods and results that cover and extend beyond the state-of-the-art in structural dynamics and earthquake engineering. Most of the chapters are based on the keynote lectures at the International Conference in Earthquake Engineering and Structural Dynamics (ICESD), held in Reykjavik, Iceland, on June 12-14, 2017. The conference is being organised in memory of late Professor Ragnar Sigbjörnsson, who was an influential teacher and one of the leading researchers in the fields of structural mechanics, random fields, engineering seismology and earthquake engineering. Professor Sigbjörnsson had a close research collaboration with the Norwegian Institute of Science and Technology (NTNU), where his research was mainly focused in dynamics of marine and offshore structures. His research in Iceland was mainly focused on engineering seismology and earthquake engineering. The keynote-lecture based chapters are contributed by leading experts in these fields of research and showcase not only the historical perspective but also the most recent developments as well as a glimpse into the future. These chapters showcase a synergy of the fields of structural dynamics, engineering seismology, and earthquake engineering. In addition, some chapters in the book are based on works carried out under the leadership and initiative of Professor Sigbjörnsson and showcase his contribution to the understanding of seismic hazard and risk in Iceland. As such, the book is useful for both researchers and practicing engineers who are interested in recent research advances in structural dynamics and earthquake engineering, and in particular to those interested in seismic hazard and risk in Iceland.

Download or read book Practice of Earthquake Hazard Assessment written by DIANE Publishing Company and published by DIANE Publishing. This book was released on 1993 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes probabilistic seismic hazard assessment as it is practiced in various countries throughout the world. 59 reports are included covering 88 countries, which comprise about 80% of the inhabited land mass of the Earth. Over 100 maps.

Download or read book Observation Informed Methodologies for Site Response Characterization in Probabilistic Seismic Hazard Analysis written by Kioumars Afshari and published by . This book was released on 2017 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, we study the effects of site response on earthquake ground motions, the uncertainty in site response, and incorporating site response in probabilistic seismic hazard analysis. We introduced a guideline for evaluation of non-ergodic (site-specific) site response using (a) observations from available recorded data at the site, (b) simulations from one-dimensional ground response analysis, or (c) a combination of both. Using non-ergodic site response is expected to be an improvement in comparison to using an ergodic model which is based on the average of a global dataset conditional on site parameters used in ground motion models. The improvement in prediction when using non-ergodic analysis results in the removal of site-to-site variability which is a part of the uncertainty in ground motion prediction. The site-to-site variability is evaluated by partitioning the residuals to different sources of variability. We illustrate application of these procedures for evaluating non-ergodic site response, and use examples to show how the reduction in site response uncertainty results in less hazard for long return periods. We utilize a dataset of recordings from vertical array sites in California in order to study the effectiveness of one-dimensional ground response analysis in predicting site response. We use the California dataset for comparing the performance of linear ground response analysis to similar studies on a dataset from vertical arrays in Japan. We use surface/downhole transfer functions and amplification of pseudo-spectral acceleration to study the site response in vertical arrays. For performing linear site response analysis for the sites, we use three alternatives for small-strain soil damping namely (a) empirical models for laboratory-based soil damping; (b) an empirical model based on shear wave velocity for estimating rock quality factor; and (c) estimating damping using the difference between the spectral decay ( ) at the surface and downhole. The site response transfer functions show a better fit for California sites in comparison to the similar results on Japan. The better fit is due to different geological conditions at California and Japan vertical array sites, as well as the difference in the quality of data for the two regions. We use pseudo-spectral acceleration residuals to study the bias and dispersion of ground response analysis predictions. The results of our study shows geotechnical models for lab-based damping provide unbiased estimates of site response for most spectral periods. In addition, the between- and within-site variability of the residuals do not show a considerable regional between California and Japan vertical arrays. In another part of this dissertation, we develop ground motion models for median and standard deviation of the significant duration of earthquake ground motions from shallow crustal earthquakes in active tectonic regions. The model predicts significant durations for 5-75%, 5-95%, and 20-80% of the normalized Arias intensity, and is developed using NGA-West2 database with M3.0-7.9 events. We select recordings based on the criteria used for developing ground motion models for amplitude parameters as well as a new methodology for excluding recordings affected by noise. The model includes an M-dependent source duration term that also depends on focal mechanism. At small M, the data suggest approximately M-independent source durations that are close to 1 sec. The increase of source durations with M is slower over the range M5 to 7.2-7.4 than for larger magnitudes. We adopt an additive path term with breaks in distance scaling at 10 and 50 km. We include site terms that increase duration for decreasing VS30 and increasing basin depth. Our aleatory variability model captures decreasing between- and within-event standard deviation terms with increasing M. We use the model for validating the duration of ground motion time series produced by simulation routines implemented on the SCEC Broadband Platform. This validation is based on comparisons of median and standard deviation of simulated durations for five California events, and their trends with magnitude and distance, with our model for duration. Some misfits are observed in the median and dispersion of durations from simulated motions and their trend with magnitude and distance. Understanding the source of these misfits can help guide future improvements in the simulation routines.

Download or read book Recent Advances in Earthquake Engineering in Europe written by Kyriazis Pitilakis and published by Springer. This book was released on 2018-04-24 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of invited lectures including the 5th Nicholas Ambraseys distinguished lecture, four keynote lectures and twenty-two thematic lectures presented at the 16th European Conference on Earthquake Engineering, held in Thessaloniki, Greece, in June 2018. The lectures are put into chapters written by the most prominent internationally recognized academics, scientists, engineers and researchers in Europe. They address a comprehensive collection of state-of-the-art and cutting-edge topics in earthquake engineering, engineering seismology and seismic risk assessment and management. The book is of interest to civil engineers, engineering seismologists, seismic risk managers, policymakers and consulting companies covering a wide spectrum of fields from geotechnical and structural earthquake engineering, to engineering seismology and seismic risk assessment and management. Scientists, professional engineers, researchers, civil protection policymakers and students interested in the seismic design of civil engineering structures and infrastructures, hazard and risk assessment, seismic mitigation policies and strategies, will find in this book not only the most recent advances in the state-of-the-art, but also new ideas on future earthquake engineering and resilient design of structures. Chapter 1 of this book is available open access under a CC BY 4.0 license.

Download or read book Hydro Environmental Analysis written by James L. Martin and published by CRC Press. This book was released on 2013-12-04 with total page 5742 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on fundamental principles, Hydro-Environmental Analysis: Freshwater Environments presents in-depth information about freshwater environments and how they are influenced by regulation. It provides a holistic approach, exploring the factors that impact water quality and quantity, and the regulations, policy and management methods that are necessary to maintain this vital resource. It offers a historical viewpoint as well as an overview and foundation of the physical, chemical, and biological characteristics affecting the management of freshwater environments. The book concentrates on broad and general concepts, providing an interdisciplinary foundation. The author covers the methods of measurement and classification; chemical, physical, and biological characteristics; indicators of ecological health; and management and restoration. He also considers common indicators of environmental health; characteristics and operations of regulatory control structures; applicable laws and regulations; and restoration methods. The text delves into rivers and streams in the first half and lakes and reservoirs in the second half. Each section centers on the characteristics of those systems and methods of classification, and then moves on to discuss the physical, chemical, and biological characteristics of each. In the section on lakes and reservoirs, it examines the characteristics and operations of regulatory structures, and presents the methods commonly used to assess the environmental health or integrity of these water bodies. It also introduces considerations for restoration, and presents two unique aquatic environments: wetlands and reservoir tailwaters. Written from an engineering perspective, the book is an ideal introduction to the aquatic and limnological sciences for students of environmental science, as well as students of environmental engineering. It also serves as a reference for engineers and scientists involved in the management, regulation, or restoration of freshwater environments.

Download or read book Geotechnical Earthquake Hazard Analysis of the Evansville Indiana Area written by Thomas D. Rockaway and published by . This book was released on 1997 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Earthquake Hazard Assessment written by Sreevalsa Kolathayar and published by CRC Press. This book was released on 2021-03-31 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides an overview of the background to and details of earthquake hazard estimation in India in a very comprehensive manner with details on seismicity data management, seismicity analysis, seismic source characterization, seismic hazard estimation using various methods and site characterization. The work presents a scientific approach

Download or read book Evaluation of Possible Seismic Hazard to Evansville IN written by Bailey Allen and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to detail the goals, methods, and results of a GIS project completed as a senior thesis. The goal of the thesis was to better understand the affects that a large seismic event related to either the Wabash Seismic Zone or the New Madrid Seismic Zone would have on the city of Evansville, IN. To achieve this goal, data from the USGS report, “Evansville Area Earthquake Hazards Mapping Project†was formatted into a raster on ArcGIS and combined with a population density map also created on ArcGIS. The resulting maps communicate which areas of Evansville are most at risk from earthquake related damage and how this will affect its citizens. This information combined with liquefaction data (Boyd) and geologic data (Haase) creates a complete image of the seismic hazard in the Evansville area.

Download or read book Probabilistic Seismic Hazard Analysis of the Mississippi Embayment Incorporating Nonlinear Site Effects written by Mahesh Singh Dhar and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mississippi Embayment (ME) area is prone to damaging earthquakes as it lies over the New Madrid Seismic Zone, which is considered the most seismically active zone in the central and eastern United States. Several attempts have been made to account for the influence of deep sediment deposits of the ME on the propagation of seismic waves. This study presents the seismic and liquefaction hazards of the ME by adding the local geologic conditions to the 2014 USGS National Seismic Hazard Model. Both equivalent linear and nonlinear site response codes have been used to determine the amplification distribution at a site. This study uses the most up-to-date information available from different researchers and attempts to reduce the effect of uncertainties. A new 3D geologic model has been generated to assign geologic information and shear wave velocity to the soil profiles distributed over the ME area. The 3D model helps to generate an interpolated soil profile at a site for more accurate site response analysis, replacing the use of generic soil profiles. For liquefaction hazard analysis, updated surface geologic maps and liquefaction potential curves have been used. At short periods corresponding to peak ground acceleration the results show that seismic hazard is reduced on the lowlands in comparison to USGS results, mainly due to deamplification of ground motions from strong nonlinearity in the softer soil deposits. The NOAH (nonlinear Iwan model) site response code shows slightly lower hazard on the lowland soils in comparison to those obtained from SHAKE91 (equivalent linear). At long periods, lowlands deposits amplify hazards more in comparison to corresponding USGS results, mainly due to much less soil nonlinearity at long periods. The liquefaction hazard tends to be high in Holocene and late Pleistocene lowlands sediments and low in Pleistocene loess of the uplands. The young sediments and shallow groundwater table depth in lowlands contribute to higher liquefaction hazard. Considering pore pressure effects in nonlinear site response analysis at a test site on the lowlands shows amplification of ground motion even at short periods. Therefore, pore pressure effects should be considered in seismic hazard analysis of the ME. .

Download or read book Seismological Research Letters written by and published by . This book was released on 2006 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non ergodic Probabilistic Seismic Hazard Analysis and Spatial Simulation of Variation in Ground Motion written by Melanie Anne Walling and published by . This book was released on 2009 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Liquefaction Hazard for the Region of Evansville Indiana written by U.S. Department of the Interior and published by Createspace Independent Publishing Platform. This book was released on 2014-02-19 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: We calculated liquefaction potential index for a grid of sites in the Evansville, Indiana area for two scenario earthquakes—a magnitude 7.7 in the New Madrid seismic zone and a M6.8 in the Wabash Valley seismic zone. For the latter event, peak ground accelerations range from 0.13 gravity to 0.81 gravity, sufficiently high to be of concern for liquefaction.

Download or read book An Overview of the SIGMA Research Project written by Alain Pecker and published by Springer. This book was released on 2017-05-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a summary of the important outcomes of the SIGMA project related to all aspects of Probabilistic Seismic Hazard Assessment: source characterization, rock motion characterization, site response characterization, and hazard calculations, with for all of them emphasis on the treatment of uncertainties. In recent years, attempts have been made to identify and quantify uncertainties in seismic hazard estimations for regions with moderate seismicity. These uncertainties, for which no estimation standards exist, create major difficulties and can lead to different interpretations and divergent opinions among experts. To address this matter, an international research project was launched in January 2011, by an industrial consortium composed of French and Italian organizations. This program, named SIGMA (Seismic Ground Motion Assessment) lasted for five years and involved a large number of international institutions. This book is intended for instructors running courses on engineering seismology, graduate students in the same field and practicing engineers involved in Probabilistic Seismic Hazard Analyses.