Contribute to usgscatstat development by creating an account on github. Time history analysis with recorded accelerograms 1. The controller is implemented using the matlab simulink interface and. Clean timetables that have missing, duplicate, or irregular times, and produce regular timetables. The response spectrum of an earthquake is the most favored seismic input for earthquake engineers. Create timetables to associate times with rows of data. Response spectra file exchange matlab central mathworks. A simple text format suitable for loading data into spreadsheet applications like microsoft excel. Robust control of a twofloors building model using active mass. This toolbox is suitable for carrying dynamic response spectrum analysis drsa for a given structure, as well as producing linear elastic. Among the most important seismic parameters of a strong ground motion are the. Elastic response spectrum file exchange matlab central. I have several traces loaded in the program, and i have downloaded seislab in order to find a proper plot.
Earthquake forces are applied at all dofs of the structure. 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. Determine the lateral displacement, base shear and base moment of the structure due to elcentro, 1940 earthquake ground motion using the response. The accelerations are in gs and sampled at a rate of 50 samples per second or with a sampling. Timehistory seismic analysis with sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software. Essentially, response spectrum analysis enables you to determine how a building would be affected by a worstcase scenario. The downloaded program spec as is reports, in the instruction, to input ag. For each value of tn,wehavetosolve equation 1 and find the.
Selected earthquake is again 1940 elcentro ns component. Download earthquake records from peer ground motion database ngawest2. At imperial, 80 percent of the buildings were damaged to some degree. The present submission contains, in addition, a matlab function to fit the nonstationary kanaitajimi model to ground acceleration records. The 1979 imperial valley earthquake occurred at 16. Openseismomatlab is an innovative opensource software for strong ground motion data processing, written in matlab. Mai and beroza, 2000, earthquake slip complexity mai and beroza, 2002, and the location of rupture nucleation mai et al, 2005. Seismic response control of buildings by perimeter walls. For elcentrodata6 and gilroydata, download files and remove. Accelerographs of the aforementioned earthquakes have been depicted in figures 5 to 7. It uses acceleration data recorded from a seismograph located near the. First of all thanks for answer my question i really apreciate that jejeje cd. Seismic response spectrum gui file exchange matlab central. This can be accomplished quickly by using broadband data from the iris dmc data management center and some coding in matlab.
Originally developed by martin mai, these software tools comes in three flavours. Southern california earthquake data center scecdc northern california earthquake data center ncecdc general earthquake observation system geos. The time history of the earthquake, must have two columns. A matlab code is developed to read the time versus acceleration data and solve the. The matlab code used in this paper is listed in the appendix. Earthquake simulation file exchange matlab central.
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. I verified my program with sap200 when a harmonic load applied in node2 and results are the same. See the wikipedia for more information on this format this feed adheres to the usgs earthquakes feed lifecycle policy. Clean timetable with missing, duplicate, or nonuniform times. Such spectra form the input for a response spectrum analysis. Locate and describe an earthquakes magnitude using matlab. However, damping ratio is 5% and end period was set to 4 sec. In the business district of brawley, all structures were damaged, and about 50 percent had to be condemned. Rfstttresponse of structures to earthquake ground motions. Imperial valley irrigation district 302 commercial. Im using direct time integration to obtain response of structure. Software to download usgs earthquake hazard program. Follow 77 views last 30 days katrine gotliebsen on 12 sep 2016.
Seismic analysis of structures wiley online library. Additionally, a spectrogram and a power spectrum of the earthquake data are generated. Construction of design response spectrum the chilean way. Dynamic response spectrum analysis rsa for an industrial. Response spectrum is plotted for elcentro earthquake with 2% damping. Seismic test for 30 storey bsb factory built building in beijing earth quake research institute duration. 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.
This function generates elastic response spectrum for seismic design of. Adjust data in a timetable to a different set of times, and synchronize data in multiple timetables. The codes implements source scaling relations wells and coppersmith, 1994. In the present study, a new matlab opensource software, called. Citeseerx case study on svd multiresolution analysis. It affected imperial valley in southern california and mexicali valley in northern baja california. Various hysteresis models are provided linear elastic, bilinear, trilinear, modified takeda, boucwen, and albermani. 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. Adam on sep 2016 im struggling on plotting real seismic traces with matlab. Its the largest city in the imperial valley and is situated below sea level. 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. It uses acceleration data recorded from a seismograph located near the fault line import and visualize data from seismograph restart. If the ground acceleration from an earthquake is known, the response of the structure can be computed via using the newmarks method. To solve this problem, earthquake response spectrum analysis is the most wellknown.
1117 900 1095 828 148 658 1002 1296 295 207 1516 443 895 1234 1009 155 804 1417 1347 1267 1331 42 619 54 722 103 1148 586 1295 1084 199 1331 376 716 546 422 985 329 1570 846 230 846 803 675 581 23 92