Astpa is an analysis support tool for the stamp based hazard analysis. 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 kramer, 1996. A matlab software for probabilistic seismic hazard. It was authored by christie hale, norman abrahamson, and yousef. Seismic analysis is a subset of structural analysis and is the calculation of the response of a building or nonbuilding structure to earthquakes. The time is ripe to move beyond the old paradigms of the traditional probabilistic seismic hazard analysis psha. Earthquake hazard analysis 0th edition by leon reiter author isbn. A seismic hazard is the probability that an earthquake will occur in a given geographic area. The length of rupture of the fault as a function of earthquake magnitude is accounted for, and ground motion estimates at the site are made using the magnitude of the earthquake and the closest distance from the. Fema 451b topic 5a handouts seismic hazard analysis 6 instructional material complementing fema 451, design examples seismic hazard analysis 5a 31 0.
I saw the paper probabilistic seismic hazard analysis for rock sites in the chennai city by g. 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, poland. The main purpose of seismic hazard analysis is to provide parameters for estimating seismic risk. Software to download usgs earthquake hazard program. Regarding the probabilistic seismic hazard analysis, the ground shaking maps indicated that the southeastern part of the mmcm and northwestern part of phayao provinces were. Seismic hazard estimates for the area of pylos and surrounding region sw peloponnese for seismic and tsunami risk assessment. 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. More specifically, sha states the probability that an intensity measure type imt will exceed some intensity measure level iml.
Fema 451b topic 5a notes seismic hazard analysis 2 instructional material complementing fema 451, design examples seismic hazard analysis 5a 2 seismic hazard analysis deterministic procedures probabilistic procedures usgs hazard maps 2003 nehrp provisions design maps site amplification nehrp provisions response spectrum ubc response spectrum. Ezfrisk software for earthquake ground motion estimation. Deterministic seismic hazard analysis notes edurev. A barebone probabilistic seismic hazard analysis code for fault source. Probabilistic seismic hazard deaggregation of ground. The example presented refers to a seismic risk analysis for the western part of the liguria region italy, mainly for the province of imperia, which has a mediumhigh hazard level, and was struck strongly by an event in 1887 6. Probablistic seismic hazard analysis psha and the detemininstic seismic hazard analysis dsha. Probabilistic seismic hazard analysis code verification. It generates tabular results useful for creating seismic hazard maps. The values returned by the two applications are not identical. It performs a hazard analysis on a rectangular grid contained by a polygon, or a selected set of points.
Deterministic seismic hazard analysis for shallow earthquakes. This integral can then be evaluated numerically within the psha software. Aug 28, 2009 the vulnerability index method, in its version developed in the framework of the european project riskue, has been adapted and applied in this article, to evaluate the seismic risk for the city of barcelona spain through a gis based tool. Seismic analysis of structures i linkedin slideshare. Issues and alternatives zhenming wang 1 abstractseismic hazard and risk are two very important concepts in engineering design and other policy considerations. Seismic hazard analysis seismic hazard analysis involves the quantitative estimation of ground shaking hazards at a particular area.
A deterministic seismic hazard analysis for shallow earthquakes in greece l. Usgs software tools for sitespecific ground motion hazard analysis. Ezfrisk technical capabilities seismic hazard analysis. Seismic hazard analysis involves the quantitative estimation of ground shaking hazards at a particular area. Please do not use this tool to obtain ground motion parameter values for the design code reference documents covered by the u. The first stage in hazard analysis is to identify the types of hazards. 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. 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. The probabilistic seismic hazard analysis is performed for 2% probability of exceedance in 50 years and 10% probability of exceedance in 50 years, while the deterministic seismic hazard analysis is carried out by sagaing and kyaukkyan fault. Ezfrisk is a software package used by engineers and seismologists to perform sitespecific earthquake hazard analysis. 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. A developing communitymodeling environment for seismic hazard analysis, seismological research letters, 74, no.
Probabilistic seismic hazard deaggregation of ground motion. 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. It is part of the process of structural design, earthquake engineering or structural assessment and retrofit see structural engineering in regions where earthquakes are prevalent as seen in the figure, a building has the potential to wave back. Seismic hazard and seismic risk in the united states earthquake hazard and emergency management 45 during a specific exposure time. Although seismic hazard and risk have often been used interchangeably, they are fundamentally different. Nov 14, 2015 page 1 nptel earthquake geotechnical engineering dept.
The goal of seismic hazard analysis sha is to state the probability that something of concern will occur given one or more earthquakes. This computer program makes probabilistic seismic hazard calculations at sites affected by earthquakes occurring on faults which are defined by the user as a series of line segments. Unified hazard tool usgs earthquake hazards program. The multisite gridded analysis module is a separately licensed addon to the annual seismic hazard analysis license. 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. It is part of the process of structural design, earthquake engineering or structural assessment and retrofit see structural engineering in regions where earthquakes are prevalent. According to this method, which defines five damage states, the action is expressed in terms of the macroseismic intensity and the seismic quality of the. Spas 2019 is a simple seismic signal processing and seismic analysis software. Combines seismic hazard with the consequences of the earthquake. Depending on the types of hazards identified, the process may need to be continued on a separate basis for each type of hazard or group of hazard types.
Opensha is an opensource, javabased platform for conducting. An introduction to probabilistic seismic hazard analysis psha. It predicts the probability of occurrence of acertain level of ground shaking at a site byconsidering uncertainties of. The senior seismic hazard analysis committee conducts a variety of seismic studies on the area surrounding the diablo canyon power plant.
Page 1 nptel earthquake geotechnical engineering dept. 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. Steps in hazard assessment the process of natural hazard. Size of earthquake location rate of occurrence of earthquake predictive relationshipcontdlec51psha is carried out in 4 steps. However, the magnitudes which dominate this seismic hazard are 0. Krinitzsky geotechnical laboratory, waterways experiment station, corps of engineers, vicksburg, ms 391806199, usa received march 6, 1995. Indian institute of technology, kanpur 1 module 7 seismic hazard analysis lectures 33 to 36 lecture 34 topics 7.
A deterministic seismic hazard analysis for shallow. 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 vulnerability index method, in its version developed in the framework of the european project riskue, has been adapted and applied in this article, to evaluate the seismic risk for the city of barcelona spain through a gis based tool. Intensity data are and should be still used as a supplement to the instrumental recordings. Open source seismic hazard analysis software framework opensha. Geological survey jorge meneses, principal geotechnical engineer, rma group, inc.
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. 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. Colors on this map show the levels of horizontal shaking that have a 2in100 chance of being exceeded in a. Sep 14, 2009 seismic hazard and seismic risk are fundamentally different. 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 and determining. Rcrisis is the newest version of crisis, a worldwide and wellknown solution for performing probabilistic seismic hazard analyses psha.
Your seismic hazard analysis module license comes with area, fault, and gridded seismic sources needed to analyze ground motion hazard in one region of the world. 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. Geological survey peter powers, research geophysicist, u. Seismic hazard and risk scenarios for barcelona, spain, using. Probabilistic seismic hazard analysis psha combines the probabilities of all earthquake scenarios with different magnitudes and distanceswith predictions of resulting ground motion intensity, in order to compute seismic hazard at a site. Global seismic hazard assessment program infrastructure risk research project at the university of british columbia, vancouver, canada. 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. Regarding the probabilistic seismic hazard analysis, the ground shaking maps indicated that the southeastern part of the mmcm and northwestern part of phayao provinces were high hazard areas, with. As an objectoriented framework, opensha can accomodate arbitrarily complex e. For example, one might want to know the probability that peak ground acceleration the imt will exceed 0. This does mean that this type of seismic hazard analysis is a much more major undertaking than in the methodologies described previously. These analyses and reports are used by mortgage brokers to make lending decisions, insurance brokers to rate assessments, and building owners to make seismic retrofit plans. Probabilistic seismic hazard analysis for the city of quetta, pakistan.
Any physical phenomena associated with an earthquake e. You can license additional regions at additional cost. Deterministic versus probabilistic seismic hazard analysis. A webgis tool for seismic hazard scenarios and risk analysis. 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.
Building code requirements are partially determined on the information that is represented in these maps. Seismic hazard and design earthquakes for the central archaeological area of rome. Seismic hazard maps one of the most recognized ways to illustrate this variation. Open source seismic hazard analysis software framework. 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 spectral matching adjusting an accelerogram to match a target. It is brought to you by the 2014 studienprojekt of the software engineering group of the university of stuttgart. 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. Because many models and data sources are combined to create results like. Elsevier engineering geology 40 1995 1 7 engneern giogy opinion paper deterministic versus probabilistic seismic hazard analysis for critical structures ellis l. Dattadepartment of civil engineering, iit probabilistic seismic hazard analysis psha. It reads seismic data acquired during a cptus measurement or downhole test and creates the profile of the shear waves velocity vs or compression waves vp for that measurement.
I wanted to check the completeness of an earthquake catalog. Infraterra personnel are experts in the development of sitespecific ground motions using probabilistic and deterministic seismic hazard analysis. Appendix d probabilistic seismic hazard analysis for. Fema 451b topic 5a handouts seismic hazard analysis 5 instructional material complementing fema 451, design examples seismic hazard analysis 5a 25 0. We provide seismic source characterization through an assessment of fault and area sources, detailed analysis of regional seismicity and tectonic setting, and development. Seismic hazard and risk scenarios for barcelona, spain. An attempt was made to compile the occurrence of past and recent seismic activities within 300 km radius, around the dam site. These analyses and reports are used by mortgage brokers to make lending decisions, insurance brokers to rate assessments, and building owners to make seismic. Seismic hazard and seismic risk are fundamentally different. Comparison of probabilistic seismic hazard analysis of nuclear. The purpose of this document is to discuss the calculations involved in psha, and the motivation for using this approach. The field of seismic hazard analysis, reing the main compcnent ex pra studies, has profited greatly from this development.
Note that all applications are being continually developed and that the project provides no guarantees as to their serviceability. A sincere effort is made herein to do seismic hazard analysis for ballar dam of chattisgarh state. Our goal is to provide a framework where any arbitrarily complex e. Psha also incorporates uncertainties in ground motion predictions, by. More than 50 million people use github to discover, fork, and contribute to over 100 million projects.
Strisk is a software package used by insurance and mortgage duediligence investigators and structural engineers to perform detailed earthquake risk analysis for individual buildings. Add a description, image, and links to the seismichazard topic page so. Strisk detailed earthquake risk analysis for individual. 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. Usgs software tools for sitespecific ground motion hazard. 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. Probabilistic seismic hazard analysis psha alternative seismic hazard assessments seismic hazard analysis sha deterministic seismic hazard anal ysis dsha or neodsha observations from wenchuan, china, earthquake m7. To learn about seismic source characterization by the senior seismic hazard analysis committee, you can explore the committees. An introduction to probabilistic seismic hazard analysis.
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