Lecture: Introduction to Seismology and Ground Motion Parameters
Lecture: Introduction to Seismology and Ground Motion Parameters
Lecture: Introduction to Seismology and Ground Motion Parameters
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
GSC415 Winter 2013<br />
Engineering Geology II<br />
<strong>Ground</strong> Shaking<br />
• For engineering purposes<br />
shaking is usually measured<br />
as acceleration in units of<br />
% g (acceleration of gravity:<br />
9.8 m/s 2 = 100% g = 1 g)<br />
– also used: gal (1 gal = 1 cm/s 2<br />
= 0.01 m/s 2 ~ 0.1% g)<br />
• <strong>Ground</strong> shaking is<br />
perceptible <strong>to</strong> humans if<br />
acceleration exceeds 0.5% g<br />
– “strong ground motion”<br />
• Structural damage in<br />
buildings not designed <strong>to</strong> be<br />
resistant usually occurs at<br />
10% g<br />
2/18/13 Cal Poly Pomona 18
Change language