How to download earthquake records for the time-history analysis from PEER Ground Motion Database

Introduction to Earthquake Record Downloads00:00:00

The video introduces the necessity of downloading earthquake records for time-history analysis, especially when the pre-installed records in software like SeismoStruct are insufficient. It highlights the SeismoSignal software for processing these records, including scaling and other modifications.

Accessing Earthquake Databases00:01:31

The tutorial demonstrates how to access various strong motion databases through SeismoSignal, focusing on the PEER Ground Motion Database as the largest and most accessible. It mentions other databases like the European and Italian strong motion databases, which may require direct contact for access.

Using the PEER Ground Motion Database00:02:16

The process of creating an account and logging into the PEER Ground Motion Database is shown. The database contains two main types: NGA-West and NGA-East. Users can search for earthquake records based on specific characteristics or well-known event names like 'Kobe'.

Searching and Viewing Earthquake Records00:04:18

After searching for 'Kobe', the video displays a list of recorded earthquakes, detailing their magnitude, mechanism, location (epicenter), and ruptures. It then shows how to select a specific record to view its location on a map and its spectral oscillation graphs.

Downloading Time Series Data00:05:54

The process of downloading the time series data for a selected earthquake is demonstrated. The data is downloaded as a zip file and then extracted. The extracted files include detailed information such as damping ratios, scaling methods, and component methods.

Analyzing Downloaded Data in SeismoSignal00:07:08

The extracted data, such as horizontal and vertical accelerations, is explored in an Excel file. The tutorial then shows how to import this data (specifically the horizontal acceleration of a Kobe earthquake record) into SeismoSignal. It guides on providing necessary information like starting and ending lines and time steps.

Post-Processing and Further Analysis in SeismoSignal00:10:31

Once the record is loaded in SeismoSignal, the video briefly touches upon advanced features like filtering, correcting distortions, cutting undesirable parts of the record, applying Fourier transformations, and creating response spectra (by frequency, displacement, or pseudo-acceleration). Finally, it mentions extracting ground motion parameters to a text file for further use.