An Elementary Quesion NLS methods

If you have a script you think might be useful to others post it
here. Hopefully we will be able to get the most useful of these incorporated in the manuals.

Moderators: silvia, selimgunay, Moderators

Post Reply
mehabb
Posts: 2
Joined: Sun Sep 19, 2010 9:49 am
Location: iaub

An Elementary Quesion NLS methods

Post by mehabb » Thu Dec 16, 2010 11:53 pm

Dear User

I'm working on nonlinear project and I'm Very new to OPENSEES.
does opensees can do modal pushover analysis and adaptive pushover analysis directly or we
should write script for it ? is it possible for pushover analysis with rigid diagheragm in opensees?

Yours
A.M Abbasi
a.m

fmk
Site Admin
Posts: 5866
Joined: Fri Jun 11, 2004 2:33 pm
Location: UC Berkeley
Contact:

Re: An Elementary Quesion NLS methods

Post by fmk » Mon Dec 20, 2010 3:58 pm

you need to write the script .. and yes, but be careful and don't use the force beam column (nonlinearBeamColumn) for the beams

gopaladhikari
Posts: 73
Joined: Tue Nov 07, 2006 3:17 am
Location: Holmes Consulting LP

Re: An Elementary Quesion NLS methods

Post by gopaladhikari » Mon Dec 20, 2010 4:21 pm

Dear Frank

Could please suggest which element should be used for beams part of a rigid diaphragm? I know restrain provided by rigid diaphragm constraint induces high axial force in the beams. any possible solution???

gopal
Gopal Adhikari, PhD
Senior Project Engineer
Holmes Consulting LP
Wellington, New Zealand

fmk
Site Admin
Posts: 5866
Joined: Fri Jun 11, 2004 2:33 pm
Location: UC Berkeley
Contact:

Re: An Elementary Quesion NLS methods

Post by fmk » Mon Dec 20, 2010 4:29 pm

in reality there is no such thing as a rigid diaphragm ... model the diaphragm with some actual elements representing the true
characteristics of the diaphragm (for 2d an elastic spring, for 3d some plane stress elements with an elastic material)

ahu861011
Posts: 16
Joined: Tue Jan 19, 2010 5:59 am
Location: zhejiang university of technology

Re: An Elementary Quesion NLS methods

Post by ahu861011 » Sun Jan 02, 2011 12:52 am

Actually I have a same problem with this . It's wired that I got high axial force in dispbeamcolumn element ,even with no rigid diaphragm .Could you give any advice for this ,fmk? :roll:

fmk
Site Admin
Posts: 5866
Joined: Fri Jun 11, 2004 2:33 pm
Location: UC Berkeley
Contact:

Re: An Elementary Quesion NLS methods

Post by fmk » Mon Jan 03, 2011 11:30 am

the node has to be in equilibrium .. if you make the other elements too stiff you are going to have the same problem as rigid constraints.

linguan118
Posts: 141
Joined: Sun Oct 03, 2010 11:36 pm
Location: Hong Kong

Re: An Elementary Quesion NLS methods

Post by linguan118 » Tue Aug 30, 2011 7:58 pm

fmk wrote:
> you need to write the script .. and yes, but be careful and don't use the
> force beam column (nonlinearBeamColumn) for the beams
Dear fmk, could you share a script of adaptive pushover analysis?
Thank you very much!
Research Assistant Professor, The Hong Kong Polytechnic University
guanlin@polyu.edu.hk

Post Reply