10-10-2014, 02:15 PM
This report is concerned with establishing a quantitative measure for internal
compatibility of response spectrum for real earthquakes. This has been attempted
by considering 30 real earthquake acceleration spectra. The data at Emery period
for 5 Values of damping has been averaged after normalizing with respect to the
zero damping spectra. Thus what has been obtained is the average of the ratio of
the damped spectrum to the undamped spectrum. The standard deviation values
also have been found. This instates for internal compatibility in what ratio the
spectra showed decrease with damping.
The obtained results are compared with the standard spectra given in IS 1893. A
comparison with the new-mark and blume spectra widely used in earthquake
engineering design is also presented