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ART 3.0 - Güralp Systems Ltd

ART 3.0 - Güralp Systems Ltd

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<strong>ART</strong><br />

Also shown in this figure (if the ‘Display metadata’ option is<br />

selected in the ‘Options’ window) are the basic earthquake,<br />

waveform and station metadata of the selected time-history.<br />

Multiple time-histories selected<br />

Clicking on this button when multiple time-histories have been<br />

selected calculates and plots the drift spectra (e.g. Iwan, 1997)<br />

of the currently selected time-histories for the damping level<br />

and material type specified in the ‘Options’ window and<br />

displays them on the same graph so that they can be easily<br />

compared (see below).<br />

3.2.21 Comparisons<br />

Clicking on this button opens a new window (see below) that<br />

allows the user to compare the observed elastic response<br />

spectra of the selected time-histories with predicted median<br />

spectra from 21 recent GMPEs (e.g. Douglas, 2003) and three<br />

seismic design codes. The GMPEs that can be selected by<br />

clicking on the check-boxes are the following:<br />

1. Abrahamson & Silva (1997) (AS97);<br />

50 Issue C

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