Bentley 2006 User Manual

 

STAAD Commands and Input Instructions 

 Section 5

 

 

The format of the FILE spectra data allows spectra as a function of damping as 
well as period.  The format is: 

Data set 1    MDAMPCV 

NPOINTCV   

(no of values = 2) 

Data set 2    Damping Values in ascending order  (no of values = Mdampcv) 

Data set 3a    Periods    

   

 

(no of values = Npointcv)  

 

3b   Spectra    

   

 

(no of values = Npointcv) 

Repeat Data set 3 Mdampcv times (3a,3b , 3a,3b , 3a,3b , etc.)  (i.e. for 

each damping value). 

Data sets 3a and 3b must have exactly Npointcv values each. Blanks or 

commas separate the values.  The data may extend to several lines.  
Do not end lines with a hyphen (-).  No comment lines (*) or semi-
colons. Multiple values may be entered per line. 

MDAMPCV 

= Number of damping values for which there will be 

separate Spectra vs. Period curves. 

NPOINTCV 

= Number of points in each Spectra vs. Period curve. If 

NPOINTCV is negative, then the period-spectra values are entered 
as pairs.