Seismic hazard describes phenomena generated by earthquakes that have potential to cause harm, but seismic risk is the likelihood chance of. The deterministic seismic hazard analysis dsha and the probabilistic seismic hazard analysis dsha are discussed. Seismic risk principles for seismic risk mitigation. It runs on linux, macos and windows, on laptops, workstations, standalone servers and multinode clusters.
Aug 01, 2004 mcguire fully describes the connection between probabilistic seismic hazard analysis psha and seismic risk in a quantitative format. Frisk fault risk was written to take advantage of repeated calculations, so that seismic hazard analyses for several ground motion parameters for instance, peak ground acceleration, velocity, and displacement, and for several sites, are most efficiently made with one execution of the program rather than with repeated executions. The gr relation for the earthquakes that have occurred in a period t 120 years in this region is. Probabilistic seismic hazard analysis psha is a commonly used. Here you can download the software installer and make comments on your. Potentially large losses justify the significant effort involved in a seismic risk assessment, and a formal assessment allows the disciplines of seismology, geology. Lineaments are linear features seen on the surface of earth which represents faults, features, shear zones, joints, litho contacts, dykes, etc. Issues and alternatives zhenming wang 1 abstractseismic hazard and risk are two very important concepts in engineering design and other policy considerations. Seismic risk assessment for oil and gas pipelines d. A seismic hazard analysis of the buildings, conducted by a registered. Switzerlands seismic hazard model is a comprehensive representation of this knowledge. Aei provides seismic risk analysis of buildings in a seismic risk assessment sra report prepared in accordance with astm standards e202616a and e255716a.
October, 1968 engineering seismic risk analysis by c. A seismic hazard is the probability that an earthquake will occur in a given geographic area, within a given window of time, and with ground motion intensity exceeding a given threshold. Seismic hazard analysis calculating the probability of earthquake ground shaking at the surface or in the bedrock beneath a site based on the location of surrounding faults. In any geographic area, three main factors together determine seismic risks. The purpose was to conduct a probabilistic hazard assessment at global level intended to be used in the probabilistic risk assessment estimating. Deterministic versus probabilistic seismic hazard analysis. The chapter introduces the analyses used to estimate the seismic hazard at a specific site. Mcguire, seismic hazard and risk analysis, earthquake engineering research institute, oakland, ca, 2004, isbn 0943198011 this book is the 10th in a series of monographs published by the earthquake engineering research institute eeri that address seismicity and earthquake ground motions, dynamic response of facilities. An example in the new madrid seismic zone of the central united states zhenming wang1 abstract seismic hazard and risk are fundamentally different concepts. Fema 451b topic 5a notes seismic hazard analysis 1 instructional material complementing fema 451, design examples seismic hazard analysis 5a 1. The first step in evaluating the seismic risk of the delta and suisun levees is to assess the seismic hazard of the site.
Alternatively, the instructor may wish to post the file electronically on the internet for the students to download. The following two paragraphs are a paraphrase from kramer 1996. The intensity of ground shaking and other earthquake effects the structure. Fema 451b topic 5a handouts seismic hazard analysis 5 instructional material complementing fema 451, design examples seismic hazard analysis 5a 25 0. Experts and authorities use it as a starting point when making decisions regarding earthquake mitigation and risk management. Even for those wellversed in this area, there is often confusion over the definition of terms and the introduction of new terms in the evolving field of seismic risk analysis.
It makes a forecast of potential earthquakes and the resulting ground motions over the next fifty years. The probabilistic seismic hazard analysis is based on the iscgem global instrumental catalog, neic u. An alternative method, seismic hazard assessment sha, is presented in this. Ezfrisk software for earthquake ground motion estimation. The probability of occurrence of a seismic event is the same at every point in this region.
The goal of seismic hazard analysis sha is to state the probability that something of concern will occur given one or more earthquakes. Seismic risk has been defined, for most management purposes, as the potential economic, social and environmental. This disseration describes in detail the current gis technology and the various steps in a regional seismic hazard and risk analysis. Buy seismic hazard and risk analysis engineering monographs on earthquake criteria. Beyond button pushing seismic risk assessment for california. The most insightful assessment of seismic hazard and risk will be made through recursive analysis, wherein a seismic hazard or risk analysis is conducted, the dominant sources of hazard or risk are identified, and more sophisticated models of these sources are created at a higher level of detail than is possible for all sources. The main purpose of seismic hazard analysis is to provide parameters for estimating seismic risk.
Extensions enable you to add features to firefox for a personalized browsing experience. Opensha is an opensource, javabased platform for conducting seismic hazard analysis sha. A brief introduction and definition of risk is given. The input from seismic hazard analysis is then used for.
Ezfrisk is a software package used by engineers and seismologists to perform sitespecific earthquake hazard analysis. Seismic hazard and risk analysis earthquake engineering. Sed seismic hazard switzerland swiss seismological service. The deterministic seismic hazard analysis dsha and the probabilistic seismic hazard analysis dsha are. Wijewickreme, the university of british columbia, canada doi. Seismic hazard maps integrate what scientists have learned about earthquake sources, crustal deformation, active faulting, and ground shaking to evaluate the. Several different attenuation relations are used to generate the ground motions in the seismic hazard analysis. Tips for assessing the safety of an extension mozilla support. Seismic hazard and risk assessment updated overview with. The results of seismic hazard assessment are used in a variety of applications. Seismic hazard is a property of an earthquake that can cause damage and loss mcguire, 2004, p.
This does mean that this type of seismic hazard analysis is a much more major undertaking than in the methodologies described previously. Seismic hazard assessment methods of hazard calculations iii. Probabilistic seismic risk analysis in the insurance industry. In assessing seismic hazard, we aim to relate earthquake occurrence to the effects. This book presents an update of seismic hazard and risk assessment. Seismic hazard due to ground shaking can be defined as acceleration response spectra or ground motion acceleration histories specified based upon a probabilistic or a deterministic analysis asce, 20. Appendix d probabilistic seismic hazard analysis for. Understanding the language of seismic risk analysis expert. Stein s, mazzotti s eds continental intraplate earthquakes. Engineering seismic risk analysis, and article in the bulletin of the seismological society vol. The site is affected by earthquakes that happen within a region of radius r 80 km from the site. Ebi consultings seismic risk evaluation reports allow our clients to understand a propertys seismic risk by calculating the probable maximum loss pml, andor the scenario expected loss sel based on a scenario earthquake consistent with current building codes.
Thus, the use of psha for seismic risk analysis is not appropriate and confusing. Seismic risk depends not only on the hazard and exposure, but also on models i. The openquake engine is an open source application that allows users to compute seismic hazard and seismic risk of earthquakes on a global scale. Joint ictpiaea advanced workshop on earthquake engineering for nuclear facilities zhenming wang 30 november 4 december, 2009.
For example, one might want to know the probability that peak ground acceleration the imt will exceed 0. Probabilistic seismic hazard assessment for armenia sustainable. Sep 14, 2009 seismic hazard and seismic risk are fundamentally different. Understanding the risks of installing selfhosted extensions. Ground motion prediction equations appropriate to the extensional tectonic regime and stable continental areas within in the region are used, with vs30 soil amplification data. Most often, this is ground shaking but it could also be liquefaction or fault rupture at the ground surface. Pdf advanced seismic hazard assessment researchgate.
Seismic hazard and seismic risk are fundamentally different. Allin cornell abstract this paper introduces a method for the evaluation of the seismic risk at the site of an engineering project. User can find the hazard for the site, model the building, run the risk assessment, inspect the results, then rerun or generate and download a report. As an objectoriented framework, opensha can accomodate arbitrarily complex e. Probabilistic seismic hazard analysis has been practically unchallenged since its inception three decades ago. As an objectoriented framework, opensha can accomodate arbitrarily complex. Ezfrisk technical capabilities seismic hazard analysis. This tool was created for easy and engaging group delivery.
Mcguire fully describes the connection between probabilistic seismic hazard analysis psha and seismic risk in a quantitative format. What is strisk strisk is a software package used by insurance and mortgage duediligence investigators and structural engineers to perform detailed earthquake risk analysis for individual buildings. It generates tabular results useful for creating seismic hazard maps. Seismic hazard and risk analysis pdf free download. The model is based on knowledge of tectonics and geology, information about the history of earthquakes, damage reports, and wave propagation models. Probabilistic seismic hazard analysis psha aims to quantify these uncertainties, and combine them to produce an explicit description of the distribution of future shaking that may occur at a site. With a hazard thus estimated, risk can be assessed and included in such areas as building codes for standard buildings, designing larger buildings and infrastructure projects, land use planning. Fema 451b topic 5a notes seismic hazard analysis 11 instructional material complementing fema 451, design examples seismic hazard analysis 5a 11 attenuation with distance note the difference between site amplification and attenuation. In order to assess risk to a structure from earthquake. Ageographic information system gis provides the ideal environment for conducting a comprehensive regional seismic hazard and risk analysis.
In particular, the fragilitybased rapid seismic risk assessment frame approach. The earthquake risk assessment provides useful information to identify the factors influencing the risk. Seismic hazard and seismic risk nuclear energy agency. A relationship between hazards and their occurrence frequency can be derived through a process called seismic hazard analysis. Geological survey catalog, and gcmt earthquake catalog. This hazard may depend upon the location of the building with respect to faults, the regional and sitespecific geologic and geotechnical features, and the specified seismic hazard levels. The sra report summarizes the risk of structural failure of a building due to the vibratory motion caused by the maximum probable design basis seismic event dbe that has a 10percent chance. Seismicat offers atc, coda, and hazus damage models. Seismic hazard and risk analysis, earthquake engineering research institute, oakland, ca. Seismic risk uses the results of a seismic hazard analysis, and includes both consequence and probability. Theoretical principles of management and engineering disciplines trading off with risk hazard and risk ii. Analysis of lineaments and faults helps in understanding the regional seismotectonic activity of the area. Seismic hazard assessment of the area of the republic of armenia ra at the scale of 1. It performs a hazard analysis on a rectangular grid contained by a polygon, or a selected set of points.
Get your kindle here, or download a free kindle reading app. Wang z 2007 seismic hazard and risk assessment in the intraplate environment. Fema 451b topic 5a handouts seismic hazard analysis 1 instructional material complementing fema 451, design examples seismic hazard analysis 5a 1. An introduction to probabilistic seismic hazard analysis.
Structural engineers can override the engineering parameters for building specific results. Introduction to probabilistic seismic hazard analysis. Understanding the terms used in a seismic risk analysis can be a daunting task for those who do not consider seismic risk analysis their area of expertise. Seismic hazard is a natural phenomenon such as ground shaking, fault rupture, or soil liquefaction that is generated by an earthquake, whereas seismic risk is the probability that humans will incur loss or damage to their built environment if they are exposed to a seismic hazard. Scenariobased earthquake hazard and risk assessment. Other readers will always be interested in your opinion of the books youve read.
Seismic hazard and seismic risk in the united states earthquake hazard and emergency management 44 the main lecture material. A building located in a region of high seismic hazard is at lower risk if it is built to sound seismic engineering principles. Seismic shaking hazard assessment department of conservation. Although seismic hazard and risk have often been used interchangeably, they are fundamentally different. More specifically, sha states the probability that an intensity measure type imt will exceed some intensity measure level iml. In a normal seismic hazard analyses intended for the public, that of a maximum considered earthquake, or maximum considered event mce for a specific area, is an earthquake that is expected to occur once in approximately 2,500 years. Buried pipeline systems form a key part of global lifeline infrastructure, and any signi. Riskj is an animated risk analysis tool which uses a 6 step process to evaluate a task or job hazard, then tracks, calculates, captures and can print out a recommended. Seismic hazard is the potential for, or probability of, dangerous earthquakerelated phenomena. Seismic hazard analysis for urban christchurch accounting for the 20102011 canterbury earthquake sequence. But on the other hand, the large amounts of data that can be used to justify the model do increase the power of the method.
Seismic risk has been defined, for most management purposes, as the potential economic, social and environmental consequences of hazardous events that may occur in a specified period of time. He begins by defining key terms and presents an overview of probabilistic seismic hazard and risk computations to show how all the elements fit together. Information and translations of seismic risk in the most comprehensive dictionary definitions resource on the web. Selecting seismic sources from extensive databases. Strisk is a software package used by insurance and mortgage duediligence investigators and structural engineers to perform detailed earthquake risk analysis for individual buildings.
Ezfrisk allows you to quickly perform probabilistic and deterministic seismic hazard analysis by. Factors that affect a structures seismic risk include. Probabilistic seismic hazard analysis for christchurch soil sites report prepared by bradley seismic ltd. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. The field of seismic hazard analysis, reing the main compcnent ex pra studies, has profited greatly from this development. These analyses and reports are used by mortgage brokers to make lending decisions, insurance brokers to rate assessments, and building owners to make seismic. Entering your sites latitude, longitude, and other site conditions and analysis choices. Strisk detailed earthquake risk analysis for individual. The multisite gridded analysis module is a separately licensed addon to the annual seismic hazard analysis license. Seismic hazards are the intrinsic natural occurrence of earthquakes and the resulting ground motion and other effects. Seismic hazard and risk analysis engineering monographs. This section presents the framew section 1 one seismic risk analysis ork for the seismic risk analysis and discusses the results from this analysis. Seismic hazard and risk analysis engineering monographs on.