Probabilistic seismic hazard analysis at regional and national. Introduction to probabilistic seismic hazard analysis. The following desktop applications were built with opensha and allow you to explore different aspects of seismic hazard. Issues and alternatives zhenming wang 1 abstractseismic hazard and risk are two very important concepts in engineering design and other policy considerations. Our goal is to provide a framework where any arbitrarily complex e. Strisk detailed earthquake risk analysis for individual. The first basic step in seismic hazard analysis is to collect the input data on tectonics and seismicity and on ground motion scaling models. A deterministic seismic hazard analysis for shallow.
Open source seismic hazard analysis software framework. Unified hazard tool usgs earthquake hazards program. Rcrisis is the newest version of crisis, a worldwide and wellknown solution for performing probabilistic seismic hazard analyses psha. This module covers the advance topics of dynamic and seismic analysis in staad pro, including the seismic equivelent lateral forces procedure, mode shapes, frequencies, participation factors, seismic response spectrum analysis and time history analysis. Deterministic seismic hazard analysis notes edurev. The 2000 building census survey carried out by turkish statistical institute tuik contains. Abstract seismic hazard modeling is a multidisciplinary science that aims to forecast earthquake occurrence and its resultant ground shaking. European facilities for earthquake hazard and risk efehr. These analyses and reports are used by mortgage brokers to make lending decisions, insurance brokers to rate assessments, and building owners to make seismic. Psha is a fundamental step to generate information that can contribute to reduce the seismic risk in cities. 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. Analysis of lineaments and faults helps in understanding the regional seismotectonic activity of the area. Fema 451b topic 5a notes seismic hazard analysis 1 instructional material complementing fema 451, design examples seismic hazard analysis 5a 1 seismic hazard analysis this topic addresses deterministic and probabilistic seismic hazard analysis, ground motion attenuation relationships, the u. The uncertainty associated with the description of the geographical coordinates of a source zone boundary is modeled by introducing the concept of random boundary, where the location of the boundary is assumed to exhibit a.
Regionalization according to administrative district 2 seismic zones maximum ground acceleration for each zone. Seismic hazard analysis lettis consultants international. Although seismic hazard and risk have often been used interchangeably, they are fundamentally different. We provide seismic source characterization through an assessment of fault and area sources, detailed analysis of regional seismicity and tectonic setting, and development of sitespecific design. Seismic hazard describes phenomena generated by earthquakes that have potential to cause harm, but seismic risk is. The software consists of a server and client but also includes data extraction and manipulation tools. Probabilistic seismic hazard analysis psha psha is the most used method to assess seismic hazard and risk for input into various aspects of public and financial policy. Provide open access to state of the art, trustworthy and reproducible data, models and information on earthquake hazard and risk, harmonised across europe. The applications are all written in java and are bundled as doubleclickable jar files. Probabilistic seismic hazard analysis using the logic tree approach. 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. Appendix d probabilistic seismic hazard analysis for.
Ucbeerc9011 earthquake engineering research center college of engineering university of california at berkeley march 1988. Iaea safety standards seismic hazards in site evaluation of nuclear installations regional workshop on volcanic, seismic, and tsunami hazard assessment related to npp siting activities and requirements. 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. The purpose of this document is to discuss the calculations involved in psha, and the motivation for using this approach. The method now called probabilistic seismic hazard analysis psha although occasionally assessment is used in place of analysis is based largely on work by cornell 1968. Enable national and local hazard and risk assessment by providing access to software and expertise required for contemporary hazard and risk assessment. For example, in the sumatran subduction region, there could be. Selecting seismic sources from extensive databases. Demarcation of areal and linear seismic sources involves a certain degree of uncertainty and this should be reflected in the final seismic hazard results. In 2014, myo thant et al calculated the seismic hazards for 2% probability of.
An introduction to probabilistic seismic hazard analysis psha. Seismic hazard analysis lci is a leader in seismic hazard analysis for critical or other highconsequence facilities e. A suggested classroom reading and homework assignment for this session are included. Sep 14, 2009 seismic hazard and seismic risk are fundamentally different. The field of seismic hazard analysis, reing the main compcnent ex pra studies, has profited greatly from this development. The following two paragraphs are a paraphrase from kramer 1996. An introduction to probabilistic seismic hazard analysis. The program is the result of more than 30 years of continuous innovations, developments and improvements, providing the most comprehensive, yet easy to use, software suitable for academic and commercial uses.
Nicolas luco is a research structural engineer with the u. Seismic hazard and seismic risk in the united states earthquake hazard and emergency management 45 during a specific exposure time. Please do not use this tool to obtain ground motion parameter values for the design code reference documents covered by the u. Infraterra personnel are experts in the development of sitespecific ground motions using probabilistic and deterministic seismic hazard analysis. Joint ictpiaea advanced workshop on earthquake engineering for nuclear facilities zhenming wang 30 november 4 december, 2009.
Phast process hazard analysis software examines the progress of a potential incident from the initial release to farfield dispersion analysis including modelling of pool spreading and evaporation, and flammable and toxic effects. Ezfrisk is a software package used by engineers and seismologists to perform sitespecific earthquake hazard analysis. For example, one might want to know the probability that peak ground acceleration the imt will exceed 0. As an objectoriented framework, opensha can accomodate arbitrarily complex e. It generates tabular results useful for creating seismic hazard maps. It performs a hazard analysis on a rectangular grid contained by a polygon, or a selected set of points.
Ezfrisk technical capabilities seismic hazard analysis. Comparison of the usa, china and japan seismic design procedures guangren yu1, m. The seismic hazard analyses performed suggest that the pga seismic hazard averaged over the next 50 years is 4050% higher than that prior to the canterbury earthquake sequence. Seismic hazards are the intrinsic natural occurrence of earthquakes and the resulting ground motion and other effects. Provides the technical background needed to fully appreciate what goes into seismic hazard analysis and thus to better understand the strengths and weaknesses of what can emerge from such analysis. Deterministic versus probabilistic seismic hazard analysis. The probabilistic seismic hazard analysis recommended in this safety guide also addresses what is needed for probabilistic safety assessments psas conducted for nuclear installations. The goal of seismic hazard analysis sha is to state the probability that something of concern will occur given one or more earthquakes. Ezfrisk software for earthquake ground motion estimation. Fema 451b topic 5a handouts seismic hazard analysis 5 instructional material complementing fema 451, design examples seismic hazard analysis 5a 25 0. Even though it has never been validated by objective testing, probabilistic seismic hazard analysis psha has been widely used for almost 50 years by governments and industry in applications with lives and property hanging in the balance, such as deciding safety criteria for nuclear power plants, making official national hazard maps, developing building code. Seismic ground motion response using shake, eera and nera for srs soil profile. Any physical phenomena associated with an earthquake e. But when examined more carefully, the approach is actually rather intuitive.
Comparison of the usa, china and japan seismic design. Because many models and data sources are combined to create results like. Introduction seismic hazard analysis is among the most common tool to estimate the expected level of intensity of ground motion which is related to seismic events, so it is the fundamental input into the decisionmaking process for tectonophysics 442 2007 6682. It is the worlds most comprehensive process hazard analysis software system. Usgs software tools for sitespecific ground motion hazard. In order to improve the accessibility of seismic hazard analysis results to design engineers and public planners software tools for interogation of seismic hazard results are currently under development keep an eye out on this page. Since seismic hazard curves were not available for the region of interest, probabilistic seismic hazard analysis was performed at four stations by considering three.
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. Seismic hazard analysis with randomly located sources. Seismic hazard and design earthquakes for the central archaeological area of rome. Pqlx is opensource software system for evaluating seismic station performance and data quality. Programs for making calculations based on the methods of cornell 1968 were published by mcguire, 1976, bender and perkins, 1987. Indian institute of technology, kanpur 1 module 7 seismic hazard analysis lectures 33 to 36 lecture 34 topics 7. The multisite gridded analysis module is a separately licensed addon to the annual seismic hazard analysis license. A relationship between hazards and their occurrence frequency can be derived through a process called seismic hazard analysis.
Seismic hazard and seismic risk in the united states earthquake hazard and emergency management 42 familiarity of the fundamental issues involved with determining the potential losses from earthquake hazards. 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. In addition to the comprehensive seismic hazard analysis, an exposure data, which should. Current seismic hazard map1997 peak acceleration%g with 10% probability of exceedance in 50 years. Entering your sites latitude, longitude, and other site conditions and analysis choices. 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. Opensha is an opensource, javabased platform for conducting. The seismic hazard analysis is concerned with getting an estimate of the. Seismic hazard estimates for the area of pylos and surrounding region sw peloponnese for seismic and tsunami risk assessment. This does mean that this type of seismic hazard analysis is a much more major undertaking than in the methodologies described previously. We provide seismic source characterization through an assessment of fault and area sources, detailed analysis of regional seismicity and tectonic setting, and development. A matlab software for probabilistic seismic hazard.
European facilities for earthquake hazard and risk. Such software also allow for critical comparisons to be made between the different technical solutions implemented, in order to understand the degree of similarity between results provided by seismic hazard calculators, within controlled. For example, probabilistic seismic hazard analysis psha, a widely used method for deriving the relationship between groundmotion values and their annual probabilities of exceedance or return periods, has been used to estimate seismic risk. Why is probabilistic seismic hazard analysis psha still. The main purpose of seismic hazard analysis is to provide parameters for estimating seismic risk. The values returned by the two applications are not identical.
Papazachosd a department of the earth sciences, university of trieste, italy b department of geophysics, faculty of geology, geophysics and environmental protection, agh university of science and technology, krakow. Srs effect of 2014 site specific spectra on building settlement analysis a probabilistic seismic hazard psha report at srs was recently completed that computed the rock and surface spectra utilizing the central and. Ictpiaea advanced workshop on earthquake engineering for nuclear facilities 30 november 4 december 2009. Probabilistic seismic hazard analysis for the city of quetta, pakistan. A deterministic seismic hazard analysis for shallow earthquakes in greece l.
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. In accordance with nsr1, seismic psas are required for seismic evaluation of nuclear power plants. Seismic ground motion response using shake, eera and nera for. Software to download usgs earthquake hazard program. In addition to the comprehensive seismic hazard analysis, an exposure data, which should sufficiently reflect the structural characteristics, value and spatial distribution of assets, is required. The deterministic and probabilistic formulations of seismic hazard analysis. Apr 09, 2020 deterministic seismic hazard analysis notes edurev is made by best teachers of. While developing the seismic hazard maps, the site condition was not considered, it is calculated only for rock condition. Strisk is a software package used by insurance and mortgage duediligence investigators and structural engineers to perform detailed earthquake risk analysis for individual buildings. 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.
Seismic hazard analysis for urban christchurch accounting for the 20102011 canterbury earthquake sequence. He serves as a liaison between the usgs national seismic hazard mapping project and the american society of civil engineers asce seismic subcommittees for the asce 7 and 41 standards, among other building code committees. Seismic hazard analysis involves the quantitative estimation of ground shaking hazards at a particular area. Intensity data are and should be still used as a supplement to the instrumental recordings. Lineaments are linear features seen on the surface of earth which represents faults, features, shear zones, joints, litho contacts, dykes, etc. However, the magnitudes which dominate this seismic hazard are 0. Nov 14, 2015 page 1 nptel earthquake geotechnical engineering dept.
In the past, probabilistic seismic hazard analysis psha has been performed by researchers to assess the level of seismic hazard in kuala lumpur, malaysia and its vicinity. Comparison of probabilistic seismic hazard analysis of nuclear. Ezfrisk allows you to quickly perform probabilistic and deterministic seismic hazard analysis by. An example in the new madrid seismic zone of the central united states zhenming wang1 abstract seismic hazard and risk are fundamentally different concepts. Given waveform data and instrument response files, pqlx server calculates trace statistics. Iaea safety standards seismic hazards in site evaluation of. To run them, you need to have java installed, preferably version 8 or higher.
Seismic hazards can be analyzed deterministically as and when a particular earthquake scenario is assumed, or probabilistically, in which uncertainties in earthquake size, location, and time of occurrence are explicitly considered. Pdf seismic hazard analysis for kuala lumpur, malaysia. In other words, seismic risk is an interaction between seismic. Earthquake hazard analysis 0th edition by leon reiter author isbn. Can evaluate structures for static or dynamic seismic analysis. Development of seismic design ground motion seismic. Probabilistic seismic hazard analysis for christchurch soil sites report prepared by bradley seismic ltd. Elsevier engineering geology 40 1995 1 7 engneern giogy opinion paper deterministic versus probabilistic seismic hazard analysis for critical structures ellis l. The senior seismic hazard analysis committee conducts a variety of seismic studies on the area surrounding the diablo canyon power plant. To learn about seismic source characterization by the senior seismic hazard analysis committee, you can explore the committees. Seismic ground motion response using shake, eera and. Krinitzsky geotechnical laboratory, waterways experiment station, corps of engineers, vicksburg, ms 391806199, usa received march 6, 1995.