Opensees Units used

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nithinvl
Posts: 18
Joined: Fri Dec 07, 2012 2:17 am
Location: IIT Guwahati

Opensees Units used

Post by nithinvl » Tue Dec 18, 2012 4:08 am

My query is regarding basic units used in OpenSees.
..............
..............
eleLoad -ele 1 -type -beamPoint 11240.5 1.0
eleLoad -ele 2 -type -beamPoint 11240.5 0.0
...............
...............
These are load statements on a simply supported beam, with two element beam. I applied the load at the central node.
When i consider the basic unit as pounds, the theoretical answer matches. But, using basic unit as kips, i get the correct answer divided by 1000.

Is the basic unit used in OpenSees is pounds or kips ?
If it is kips, where could i be wrong ?

I am using OpenSees version 2.4.0.

Kindly clarify the doubt.

Thank You

Nithin

partla
Posts: 35
Joined: Wed Feb 01, 2012 3:04 am
Location: Urmia university

Re: Opensees Units used

Post by partla » Tue Dec 18, 2012 9:22 am

Nithin,
Opensees is unitless. You should consider a system of units (e.g. kN,m,s) and put all the parameters in that units. Certainly all the outputs will be the same.

nithinvl
Posts: 18
Joined: Fri Dec 07, 2012 2:17 am
Location: IIT Guwahati

Re: Opensees Units used

Post by nithinvl » Wed Dec 19, 2012 11:40 am

Yes....i found out....i made some mistake in my input....anyway, thank you partla...

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