The Earthquake Engineering Online Archive

Rock motion accelerograms for high magnitude earthquakes

Seed, H. Bolton; Idriss, I. M.

UCB/EERC-69/07, Earthquake Engineering Research Center, University of California, Berkeley, 1969-04, 18 pages (450/S411/1969)

An approximate procedure for developing the form of an appropriate accelerogram for anticipated rock motions is described, taking into account such considerations as (1) both the amplitude of accelerations and the predominant period of the motions developed in rock during earthquakes vary with the distance of the site from the source of energy release and (2) the time history of rock motions developed adjacent to any particular site is likely to depend considerably on the location of the site relative to the fault break and thus the pattern of the zone of energy release will differ considerably depending on whether the site is located near the end of the fault break with the break propagating away from the site, or whether it is located near the middle part of the break with the energy source first approaching and then moving away from the site.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-69-07.pdf (841 KB)