The primary objective of this task was to develop guidance for selecting, generating, and scaling earthquake ground motions for effective use in performing responsehistory analyses for use in performancebased seismic engineering. The sources of ground motion records in simbad are given in table 1. A key feature on eqtools is the ability to plot a variety of ground motion attenuation relationships. This study presents a methodology for selecting and scaling real earthquake ground motions to be used. Is there any software for scaling earthquake records. Design ground motion library dgml tool for selecting. The ground motion selection approach adopted for conducting fragility analysis of structures through nonlinear dynamic analysis can affect significantly the results obtained. Selection of a set of 7scaled accelerograms according to the. The prediction is often obtained by selecting ground motions that match a target response spectrum, and using those ground motions as input to dynamic analysis. The ground motion predictions for phase iii of the grand saline experiment are then made using our best guesses for site material properties. Software for the selection and scaling of ground motion records. Any comments, questions, bug reports regarding the peer ground motion database pgmd beta version. Scaling of ground motions and its implications to plan. A ground motion record accelerogram is a measurement with high specificity to the fault that caused the earthquake.
Why is it useful to scale seismic ground motion data. This tutorial will show you how to download unscaled earthquake records using the peer ground motion database beta version. Certain commercial software, equipment, instruments, or materials may have. Openseismomatlab is an innovative opensource software for strong ground motion data processing, written in matlab.
The earthquake ground motion and response spectra design. A ground motion record selection approach based on. The study concluded that ida provides an optimal solution over adp. Incremental dynamic analysis 4 instructional material complementing fema p751, design examples. Note that the database does not include the actual recorded acceleration histories, it only includes metadata about the records, including information about the earthquake event, the recording station, the processing of the record, and so on. Scaling earthquake ground motions for performancebased. This set of f90routines implements the mai et al 2010 approach for hybrid broadband groundmotion simulations. Large scale regression analyses for empirical scaling of strong ground motion.
Further qaqc may be needed to ensure the quality of this database. Simply select your manager software from the list below and click on download. This video is all about earthquake ground motion including velocity, accleration, displacement time history, ground motion spectra, fourier amplitude spectru. Following a thorough study of the state of the practice with regard to selecting and scaling ground motions for nonlinear responsehistory analysis of buildings, the project team developed a list of key challenges facing design professionals tasked with selecting and.
New ground motion requirements of chapter 11 site coefficients tables 11. Figure 9 from selection and scaling of ground motion time. The scaling tool available on this site is to be used to determine the scale factors to be used in the simulation. To scale the input of ground motion records, what software we can use. Eqe 520 strong ground motion department of earthquake. Based on elasticperfectlyplastic and bilinear inelastic singledegreeoffreedom systems, the accuracy, efficiency, and consistency of the ascesei 7 groundmotion scaling procedure are examined by comparing the median and mean values of the inelastic deformation due to 480 sets of scaled records against benchmark values. Quakemanager software for ground motion selection and scaling. Baker abstract for performancebased design, nonlinear dynamic structural analysis us ing various types of input ground motions is required. The software comes with predefined ground motion databases such as the sacsteel strong motion library including acceleration files and the nga. A new opensource software for strong ground motion data processing called openseismomatlab is presented, which uses advanced time integration algorithms, contains open and free source code written in matlab, and uses an accurate formulation and implementation of the elastoplastic bilinear kinematic hardening constitutive model. Seismosoft earthquake engineering software solutions seismosoft. Seismosoft earthquake engineering software solutions 20200430t16. Software applications for analysis of structures subjected to seismic actions. Selection, scaling and simulation of input ground motion for time history analysis of structures yasin m.
Routine processing of large accelerogram data sets and database organization for use in regression analyses. Selecting and scaling earthquake ground motions for. The result of this amplification is a response spectra design as figure 4 on soil surface. Earthquake ground motion analysis ground motion spectra. Inverse kinematics computes the joint angles for a musculoskeletal model that best reproduce the motion of a subject. Scaling of ground motions for performing incremental.
Amplification process is a step to acquire the quantity of a ground motion on soil surface the soil site condition. The impact of alternate groundmotion scaling procedures on the distribution of displacement responses in simplified structural systems is investigated. Seismoselect can retrieve data from three strong motion databases. Quakemanager is an innovative software for the management, selection, modification and analysis of ground motion records. Check out the quakemanager software for selecting and scaling optimal suites of ground motion records given a number of criteria and constraints. The webbased pacific earthquake engineering research center peer ground motion database provides tools for searching, selecting and downloading ground motion data. The software package includes a database of ground motion records and a software tool for selecting, scaling, and evaluating time histories for applications. Stochastic model for earthquake ground motion using wavelet packets by yoshifumi yamamoto and jack w. The scaling method of the selected ground motions is a second factor that plays a major role as well. Selection and scaling of ground motion time histories for structural design using genetic algorithms farzad naeim, m. Tutorial 3 scaling, inverse kinematics, and inverse. Selection and scaling of ground motion time histories for. Ground motion scaling in time domain in this approach, recorded motion is simply scaled up or down uniformly to best match the target spectrum within a period range of interest, without changing the frequency content.
Dozens of scaling options are available, including a method that satisfies the requirements given in asce 705 and asce 710. Earthquake ground motions for performing response history analysis. Selection, scaling and simulation of input ground motion. The problem with code characterization of ground motions 3.
The capabilities of selection and analysis as well as scaling of ground motion records against several types of target spectra, including the asce 7 spectrum. Complexity and scaling in the near field of earthquake ruptures. Stochastic model for earthquake ground motion using. Peer ground motion database tutorial unscaled youtube. Software for selecting and scaling ground motions to be consistent with a target conditional spectrum. Result of selection of scale factors for a preselected seven pairs of time histories by the genetic algorithm using the penalty function. Selection and scaling of ground motion time histories for structural design using genetic algorithms. This is important, for example, when coupling ground motion hazard curves from probabilistic seismic hazard analysis with results from dynamic structural analysis. Tutorial 3 scaling, inverse kinematics, and inverse dynamics. Deep borehole instrumentation along san francisco bay bridges. How to scale ground motion to desired pga such as 0. Scaling of ground motion to match the target spectra is executed in multiple sweeps to ensure convergence preserving.
Eqtools provides a large number of ground motion scaling tools. Gui application for the selection and scaling of earthquake ground motions. Significance of ground motion scaling parameters on. Quakemanager is the first and only software that simultaneously addresses all of the above representations of ground motion records, in a seamlessly integrated and elegantly designed user interface. An overview of the state of the art in ground motion selection and. Variety of software for the response spectrum compatible selection is available. Both adaptive pushover analysis as well as incremental dynamic analysis were performed using 20 ground motions. Eeri this paper presents a new approach to selection of a set of recorded earthquake ground motions that in combination match a given sitespecific design. While the sensitivity of bridge structures to input motion characteristics has not been studied as explicitly as that of building. Software for selecting earthquake ground motions to match a target conditional spectrum. Seismosoft earthquake engineering software solutions. Software development for routine and specialized processing of analogue and digital strong motion accelerograms.
One simple approach to ground motion selection and scaling is to scale a suite of input motions to a target spectral acceleration at the fundamental period of the structure of interest. The study considered reference event of the magnitude. The capabilities of selection and analysis as well as scaling of ground motion records against several types of target spectra, including the asce 7 spectrum, spectra from attenuation relationships, and conditional mean spectra are included. Required number of records for ascesei 7 groundmotion. Nonlin and eqtools software for earthquake engineering education. Scaling is performed using standard software seismomatch. Selection and scaling of real earthquake accelerograms to fit 1234 4.
Quakemanager is a software product for the management, selection, modification and analysis of ground motion records. While eqtools may be used for professional practice or academic research, the fundamental purpose behind the development of the software was to make available a classroomlaboratory tool that provides a visual basis for learning the principles behind the selection of ground motion histories and their scalingmodification for input into time. It improves upon an earlier algorithm by jayaram et al. Learn more check out the 2020 versions of seismosoft programs. The dgml is currently on a dvd, and consideration is being given to converting the dgml to internet webbased usage. These parameters are the number of ground motion records, period range, number of periods used in the related period range, and distribution of weight factors at the selected periods. The software implements an elastoplastic bilinear kinematic hardening constitutive model and uses a stateoftheart single step single solve time integration algorithm featuring exceptional speed, robustness and accuracy. All answers 15 seismosignal is a best and simple option for scaling earthquake records. Groundmotion attenuation and earthquake source scaling in eastern north america. Scaling of ground motions and its implications to planasymmetric structures. Ground motion history analysis, linear response spec. All downloaded records are unscaled and asrecorded unrotated. Quakemanager provides users with integrated ground motion selection, modification and analysis tools, incorporating new stateoftheart techniques by ground motion researchers. Ground motion scaling in the marmara region, turkey.
A new ground motion selection and scaling procedure for nonlinear seismic response prediction esra zengin1 and sinan akkar2 abstract. This software can be used to select ground motions with a target response spectrum mean and covariance matrix. Strategy for selecting input ground motion for structural seismic. Selection and scaling of real earthquake accelerograms to. Nonlin and eqtools software for earthquake engineering. Strong motion data processing usc earthquake engineering. New ground motion requirements of asce 716 bssc webinar, july 28, 2017 charlie kircher content 1. The course encompasses the earthquake basic information, strong motion data processing and scaling, background of probabilistic and deterministic hazardrisk analyses and their analytical applications which become essential in estimation of design basis ground motion parameters for structures. This approach has been enhanced during the last decades and is currently available in a stable. Recommendations are provided for selecting and scaling ground motions for performancebased assessment of buildings. Of course there are not two identical faults and every time a fault is activated it doesnt produce the same ground motion. The codes compute the highfrequency hf seismic scattered wavefield for a specified earthquake source generally a pointsource at this time, and combines the hfwaves with userprecalculated lowfrequency lf wavefield. Thus, we use seismograms from the large amount of aftershock data recorded by the microseismic networks instead of trying to reproduce the details of the highfrequency ground motion in the time domain, we use a source model and a regional scaling law to predict spectral shape and amplitude of ground motion at various sourcereceiver distances.
The effects of four parameters, involved in the followed scaling method, on both the amplitude of scale factors and seismic response of structures are investigated. This research has shown that structural response of buildings can be quite sensitive to the selection and scaling of ground motions used in nonlinear analyses. Then, using the joint angles from inverse kinematics and experimental ground reaction force data, the net reaction forces and net moments at each of the. The recorded peak acceleration, frequencies, duration etc depend on the fault geometry and movement. Xu l 2003 software for calculating earthquake ground motions from finite faults in vertically varying media in.
The uniform building code ubc 1997 is employed to amplify a ground motion in base rock to be a ground motion on soil surface. Quakemanager provides users with integrated ground motion selection, modification and analysis tools, incorporating new stateof. Selection and scaling of ground motion time histories for structural design using genetic algorithms show all authors. See a sample list of companies that trust seismosoft earthquake software solutions for their structural engineering projects. If you have the appropriate software installed, you can download article citation data to the citation manager of your choice.