Earthquake simulation file exchange matlab central. Selected earthquake is again 1940 elcentro ns component. However, damping ratio is 5% and end period was set to 4 sec. Locate and describe an earthquakes magnitude using matlab lets say a big earthquake occurs somewhere in the world and you want to know a bit about it.
Openseismomatlab is an innovative opensource software for strong ground motion data processing, written in matlab. I form approved report documentation page omb aov 07008 public reporting burden for this collection of information is estimated to average i hour per response, including the time for resiewing instructions searching existing data sources. Time history analysis with recorded accelerograms 1. Download earthquake records from peer ground motion database ngawest2. The accelerations are in gs and sampled at a rate of 50 samples per second or with a sampling. This function generates elastic response spectrum for seismic design of. Originally developed by martin mai, these software tools comes in three flavours. Essentially, response spectrum analysis enables you to determine how a building would be affected by a worstcase scenario. 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. A simple text format suitable for loading data into spreadsheet applications like microsoft excel.
It affected imperial valley in southern california and mexicali valley in northern baja california. To solve this problem, earthquake response spectrum analysis is the most wellknown. I verified my program with sap200 when a harmonic load applied in node2 and results are the same. Southern california earthquake data center scecdc northern california earthquake data center ncecdc general earthquake observation system geos.
Locate and describe an earthquakes magnitude using matlab. Its the largest city in the imperial valley and is situated below sea level. The downloaded program spec as is reports, in the instruction, to input ag. Response spectra file exchange matlab central mathworks.
It uses acceleration data recorded from a seismograph located near the fault line import and visualize data from seismograph restart. The codes implements source scaling relations wells and coppersmith, 1994. The program requires as input a gis point dataset of earthquake locations containing strike, dip, and rake values for a nodal plane of each earthquake. Mai and beroza, 2000, earthquake slip complexity mai and beroza, 2002, and the location of rupture nucleation mai et al, 2005. It uses acceleration data recorded from a seismograph located near the. Construction of design response spectrum the chilean way. Seismic analysis of structures wiley online library. Seismic test for 30 storey bsb factory built building in beijing earth quake research institute duration. In the present study, a new matlab opensource software, called.
Software to download usgs earthquake hazard program. Imperial valley irrigation district 302 commercial. Adjust data in a timetable to a different set of times, and synchronize data in multiple timetables. Additionally, a spectrogram and a power spectrum of the earthquake data are generated. Among the most important seismic parameters of a strong ground motion are the. The time history of the earthquake, must have two columns. This can be accomplished quickly by using broadband data from the iris dmc data management center and some coding in matlab. Create timetables to associate times with rows of data. Various hysteresis models are provided linear elastic, bilinear, trilinear, modified takeda, boucwen, and albermani. A matlab code is developed to read the time versus acceleration data and solve the. Follow 77 views last 30 days katrine gotliebsen on 12 sep 2016. Rfstttresponse of structures to earthquake ground motions. First of all thanks for answer my question i really apreciate that jejeje cd.
Elastic response spectrum file exchange matlab central. See the wikipedia for more information on this format this feed adheres to the usgs earthquakes feed lifecycle policy. Citeseerx case study on svd multiresolution analysis. Response spectrum is plotted for elcentro earthquake with 2% damping. Im using direct time integration to obtain response of structure. At imperial, 80 percent of the buildings were damaged to some degree. Earthquake forces are applied at all dofs of the structure. A displacement response spectrum is the plot of maximum displacement of a single degree of freedom system sdof to a particular ground motion as a function of the natural frequency and damping ratio of the sdof.
In the business district of brawley, all structures were damaged, and about 50 percent had to be condemned. Determine the lateral displacement, base shear and base moment of the structure due to elcentro, 1940 earthquake ground motion using the response. Such spectra form the input for a response spectrum analysis. If the ground acceleration from an earthquake is known, the response of the structure can be computed via using the newmarks method. This data can be already preloaded into matlab, or introduced by selecting the option open new ascii file inside the popup menu named file input method. The controller is implemented using the matlab simulink interface and. This toolbox is suitable for carrying dynamic response spectrum analysis drsa for a given structure, as well as producing linear elastic. Seismic response control of buildings by perimeter walls. Clean timetable with missing, duplicate, or nonuniform times. Clean timetables that have missing, duplicate, or irregular times, and produce regular timetables. The matlab code used in this paper is listed in the appendix.
Contribute to usgscatstat development by creating an account on github. Accelerographs of the aforementioned earthquakes have been depicted in figures 5 to 7. The 1979 imperial valley earthquake occurred at 16. I have several traces loaded in the program, and i have downloaded seislab in order to find a proper plot. The present submission contains, in addition, a matlab function to fit the nonstationary kanaitajimi model to ground acceleration records. Adam on sep 2016 im struggling on plotting real seismic traces with matlab. For elcentrodata6 and gilroydata, download files and remove. For each value of tn,wehavetosolve equation 1 and find the. Seismic response spectrum gui file exchange matlab central. Timehistory seismic analysis with sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software.
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