SAP2000 doesn't perform unit conversions automatically. Refer to the
SAP2000 manuals. In the "Response-Spectrum Analysis" section of volume 1
(pp. 308-314) the answer is given. An example appears in the "SPEC Data
Block" section of the volume 2 manual (pp. 164-167).
> -----Original Message-----
> From: Gobo, Gina [mailto:ggobo(--nospam--at)DLRGROUP.com]
> Sent: Friday, February 04, 2000 1:13 PM
> To: 'seaint'; 'SAP2000'
> Subject: SAP2000
> Okay, this is my last and final question for today regarding response
> spectrum analyses and SAP2000:
> I have used the response spectrum function shown at the end of
> this message.
> I was looking over my .s2k input file for SAP2000 and noticed that the
> default scale factor for the response spectrum function is SF=1.0. Is this
> correct? My units are in kips and inches. The acceleration values for the
> response spectrum analysis are in g's. Don't I need to multiply
> the response
> spectrum design acceleration ordinates by 386.4 in/sec2 to get the actual
> design accelerations? Or does SAP2000 already do this? I promise that this
> is my last question for the day on SAP2000!
> Response Spectrum Function:
> Gina T. Gobo, E.I.T.
> Structural Engineering
> DLR Group
> Ph. 206.461.6000
> Fax 206.461.6049