Relationship between peak ground acceleration, peak ground. Evaluation of peak ground acceleration and response spectra considering the local site effects. Peak ground acceleration pga of indonesia for 10% 50yr with 5% damping as of 19 jul 2010. The accelerograph records three orthogonal components of ground acceleration at a certain location. At the same time, an attenuation relationship is derived for the ratio of the peak horizontal ground velocity and acceleration from the same set of data.
Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. Peak ground acceleration pga is equal to the maximum ground acceleration that occurred. Peak ground velocity pgv has received much less attention in the technical literature than more widelyused parameters such as peak ground acceleration pga and response spectral ordinates. However, there are many examples of the use of pgv in engineering seismology and earthquake engineering, including as a parameter from which to estimate. Fannie mae peak ground acceleration home client types fannie mae peak ground acceleration the 2014 update of the fannie mae multifamily selling and servicing guide for property needs assessments pna has been revised to include a determination of site seismic hazard using the 475year 10% in 50year peak ground acceleration. Since the intensity of gravity g is about 10 meterssecsec 10 gals is about 1% of gravity. Peak ground acceleration with a 1% probability of exceedance. In fact, the true measure is pseudospectral acceleration, which is equal to. Costa rica is located in a seismically active region. Calculation of earthquake actions on building structures in. The theoretical scaling of nearfield peak ground acceleration and peak ground velocity with moment magnitude, m w, is found using an l model of rupture. Peak acceleration is a commonly employed parameter for these regressions, but peak velocity, peak displacement, spectral amplitudes, and duration have also been modeled in this manner.
The building codes such as the ibc contain such maps and the standard discusses how to apply these to determine the appropriate qualification levels for canada, the us and mexico. Mar 04, 2011 global earthquake hazard distribution peak ground acceleration is a 2. Peak ground acceleration pga and spectral acceleration sa are commonly used in terms of expressing earthquake hazards. However, there are many examples of the use of pgv in engineering seismology and earthquake engineering, including as a parameter from which to estimate macroseismic intensity and. May 03, 2012 for 10 percent probability of exceedance in 50 years, probabilistic peak ground acceleration is 0. Us peak ground acceleration seismic map us peak ground acceleration seismic map pga is an important measure for earthquake engineering and in due diligence, for example in fannie maes 2014 update in their property needs assessment requirements. Ground acceleration an overview sciencedirect topics. Global earthquake hazard distribution peak ground acceleration is a 2.
Maps are then downloaded as pdf files or postscript files. The pga and spectral acceleration m m play an important role in. Downloads global earthquake hazard distribution peak. Utilization of classification techniques for the determination of liquefaction susceptibility of soils.
An accelerogram can be integrated to obtain the time variations of the ground velocity and ground displacement. In the past, several researchers have developed over 450. How can i calculate the peak ground acceleration from a. Relationship between peak ground acceleration, peak ground velocity, and intensity in taiwan article pdf available in bulletin of the seismological society of america 93. Pdf estimation of peak ground acceleration pga for. Seismic hazard assessment for guam and the northern. This particular data set is for peak ground acceleration with a 1 percent probability of exceedance in 1 year. It is observed that jabalpur showed highest value of pga of 0. The dominant period ranges, of the recorded ground motions at the wind farm sites, were around 0. Pga records the acceleration rate of change of speed of these movements, while peak ground velocity is the greatest speed rate of movement reached by the ground, and peak displacement is the distance moved. Values of peak horizontal ground velocity and displacement derived from accelerograms of past earthquakes and. Empirical relationships between the macroseismic intensity and the ground. This data set represents the results of calculations of hazard curves for a grid of points with a spacing of 0. Determination of standard response spectra and effective.
The theoretical scaling of nearfield peak ground acceleration and peak ground velocity with moment. The kinematic soilfoundation interaction changes the free field ground motion to a different motion at the foundation of a structure. The local site effects play an important role in the evaluation of seismic hazard. Peak ground acceleration, velocity and displacement from moderate magnitude undercrustal earthquakes of vrancea region. Ground accel responding accel c building natural period 0. Pga is the effective peak ground acceleration during the earthquake. Procedures for estimating earthquake ground motions. Jul 19, 2010 list of organizations that are actively providing reliefweb with content. Pdf relationship between peak ground acceleration, peak. The memphis,sheby county seismic hazard maps show expected earthquake ground shaking levels, or ground motions, with var iations shown as different. The peak ground acceleration pga is used here as the maximum absolute value of acceleration found for particular strong motion record. Pga records the acceleration rate of change of speed of these movements, while peak ground velocity is the greatest speed rate of movement. For the us, seismic hazard maps are available for download at usgs.
I introduction earthquakes are one of the most destructive natural hazards in the world. Maps of spectral sat, where t is the period in seconds and peak ground acceleration pga values are given in units of g 9. The data are for the central and eastern united states and are based on the oneyear model. Global earthquake hazard distributionpeak ground acceleration is a 2. The goal of the study is to analyze the distributions of peak ground acceleration, velocity and displacement from 18 moderate size undercrustal earthquakes m w 4. The analysis involved determination of peak ground acceleration at bedrock using probabilistic seismic hazard. Note on scaling of peak ground acceleration and peak. Attenuation of peak ground acceleration, velocity and.
That is the maximum horizontal ground acceleration excluding high frequency spikes. It is likely the peak ground acceleration is given as to be taken in an ultimate probabilistic strength viewpoint. Predictive equations for the kinematic soil foundation effect are derived using 350 strong motion records generated by 114 earthquakes world. Note on scaling of peak ground acceleration and peak ground. Peak ground acceleration pga is a measure of the acceleration of the ground during earthquake. Seismic hazard maps for the national building code of. Global attenuation relationship for estimating peak ground.
Jan 23, 2017 pga records the acceleration rate of change of speed of these movements, while peak ground velocity is the greatest speed rate of movement reached by the ground, and peak displacement is the. Home resources library us peak ground acceleration seismic map us peak ground acceleration seismic map pga is an important measure for earthquake engineering and in due diligence, for example in fannie maes 2014 update in their property needs assessment requirements. The pga can be estimated by attenuation relationships using magnitude, distance, source type etc of a ground motion. Earthquake hazard map peak ground acceleration pga of.
Recorded ground acceleration timeseries data in two directions northsouth and eastwest at kamisu and hiyama wind farms fksh 19 and ibrh20 are presented in fig. This scaling matches well with the magnitude scaling of recent attenuation relations. With the use of multiple regression analysis, empirical formulae of attenuation of the maximum peak ground acceleration, velocity and displacement were proposed for three subsoil conditions. Spectral acceleration, sa, is the most commonly used intensity measure in practice today for analysis of buildings. Your geotech is right in the point that it is a single value to be given. Pdf peak ground acceleration, velocity and displacement from. Seismichazard maps for the conterminous united states, 2014. Calculation of earthquake actions on building structures. Map index peak ground accelerations usgs earthquake hazards. Peak acceleration an overview sciencedirect topics.
Ground motion, jabalpur city, seismic hazard analysis, pga, psha. The global earthquake hazard distribution peak ground acceleration is a 2. The spectral response accelerations are obtained from maps. Sa spectral acceleration is approximately what is experienced by a building, as modeled by a particle on a massless. Seismic design maps usgs earthquake hazard program. Peak ground acceleration pga is a very important ground motion parameter which is used to define the degree of ground shaking during an earthquake. Pdf the goal of the study is to analyze the distributions of peak ground acceleration.
It is also very helpful for designing earthquake resistant structure. The data are for the western united states and are based on the longterm 2014 national seismic hazard model. View the article pdf and any associated supplements and figures for a period of 48 hours. Seismic zone or hazard maps are used to give the peak ground acceleration. Modified mercalli scale uwi seismic research centre. This note shows that derivations of the scaling of peak ground acceleration and peak ground velocity with magnitude made using this rupture model are consistent with what has been found. The peak acceleration was picked from accelerograms irrespective of seismic phase. Metadata global earthquake hazard distribution peak. To provide a means of assessing the relative distribution and frequency of global earthquake hazard. Development of maximum considered earthquake ground motion. Peak ground acceleration structural engineering general.
View peak ground acceleration research papers on academia. The variation of peak horizontal acceleration and spectral acceleration has been evaluated for return periods of 475 years and 2500 years. The peak ground acceleration pga is the maximum amplitude of the ground acceleration timehistory. Seismic hazard maps of memphis, shelby county, tennessee. Abstract a consistent set of empirical attenuation relationships is presented for predicting freefield horizontal and vertical components of peak ground acceleration pga, peak ground velocity pgv, and 5% damped pseudoabsolute acceleration response spectra psa. Center for hazards and risk research chrr columbia university, and center for international earth science information network ciesin columbia university. This value represents the maximum acceleration that a ground motion will cause in a linear oscillator with a speci. The peak ground acceleration, duration, and frequency content of earthquake can be obtained from an accelerograms. List of organizations that are actively providing reliefweb with content. Geotechnical data and soil column model for site located in the southern sharon and lod valley area zone 3, yehud area table 7. As defined by usgs, pga peak acceleration is what is experienced by a particle on the ground. Site response effects were also considered and the pga values at ground surface for the entire study area were developed for four different site classes. Learn more about accelerogram, seismic, seismology, geophysics, pga.
The peak ground acceleration pga and sa values at ground surface may vary signi. However, the peak ground acceleration pga values obtained are high due to unsuitable ground motion prediction equation gmpe. Nasa socioeconomic data and applications center sedac. When the ground is shaking during an earthquake, it also experiences acceleration. Peak ground acceleration can be expressed in g the acceleration due to earths gravity, equivalent to gforce as either a decimal or percentage. The map is based on the most recent usgs models for the conterminous u. Evaluation of peak ground acceleration and response. If the property is located in a region with a high seismic risk i. Estimation of peak ground acceleration and spectral. For 10 percent probability of exceedance in 50 years, probabilistic peak ground acceleration is 0. The peak acceleration is the largest increase in velocity recorded by a particular station during an earthquake. Values are for firm ground nbcc 2015 site class c, average shear wave velocity 450 ms. Scholz 1982a discusses the consequences of the l rupture model for the scaling of peak ground acceleration, pga, with rupture length, l. In terms of structural response, it corresponds to the peak value of the absolute acceleration of a single degree of freedom sdof system with.
The map of peak ground velocity pgv is given in ms. This is the most important parameter for the designing purpose. The present paper was done under the title of peak ground acceleration pga on bedrock and uniform seismic hazard spectrauhs for different. Estimation of peak ground acceleration for jabalpur city. Fannie mae peak ground acceleration the 2014 update of the fannie mae multifamily selling and servicing guide for property needs assessments pna has been revised to include a determination of site seismic hazard using the 475year 10% in 50year peak ground acceleration. A record refers to the recorded ground acceleration histories.
Determination of standard response spectra and effective peak. Earthquake energy is dispersed in waves from the hypocentre, causing ground movement omnidirectionally but typically modelled horizontally in two directions and vertically. This interaction effect may be expressed by the ratio of the peak horizontal acceleration of a rigid and relatively lightweight foundation to the peak horizontal acceleration at the ground surface in the free field. Global earthquake hazard distribution peak ground acceleration.