Index of /~rcc1/Spectra

      Name                    Last modified       Size  Description


[DIR] Parent Directory        01-Sep-2005 15:45      -  
[DIR] PCDOS/                  22-Sep-2003 14:09      -  
[   ] SPECTR7.FOR             22-Sep-2003 14:57     9k  
[   ] SPECTO                  22-Sep-2003 14:57    19k  
[   ] SPECTI                  22-Sep-2003 14:57    30k  
[   ] SPECTR7.EXE             22-Sep-2003 14:57    44k  

Program: SPECTR

Title: Spectra Response Analysis

Developer: N. C. Donovan, Dames and Moore, San Francisco, California 1972.

Modified: T.F. Blake, Newbury Park, California [PC DOS version] 1990.

Category: Strong Motion Data Processing

Platform: PC DOS 5, MS Fortran v.5.1

Reference: Donovan, N.C.,"Spectra Response Analysis, Program 
Documentation," Dames & Moore, San Francisco, 1972.

Summary: The program evaluates dynamic response spectra at various
periods and presents the results as a log-log plot. On the basis of a
given time-acceleration record, the program numerically integrates the
normal convolution time integral for various natural periods and desired 
damping ratios. Relative displacements, relative and pseudo-relative
velocities, absolute and pseudo-absolute accelerations are computed for 
natural periods from .01 seconds to 100 seconds. The program provides 
tables of displacement, velocity, and acceleration values with three
measures of spectral intensity. A printer plot of desired damping ratios 
of the pseudo-relative velocity vs. natural period is presented on a 
2 inch by 2 inch log-log grid.