how to reflect the correlation of shear and torsion

cjwxslw · Post by **cjwxslw** » Sat Nov 06, 2010 1:15 pm

Hi,
"section aggregator * * *" is used to construct a sectionaggregator object which groups into one single section force-deformation section, for example, combined the shear and torsion in 3D model,
however , you know , shear and torsion are taked for independent variables, and i want to know how to reflect the correlation of shear and torsion into the opensees command?
thank you !

chen

vesna · Post by **vesna** » Mon Nov 08, 2010 12:21 pm

Section aggregator command does not account for interaction between shear and torsion in the section. However using this command you can assign the two uniaxial materials to the section, one for shear and one for torsion.

Here you can find an explanation about the command:
http://opensees.berkeley.edu/wiki/index ... Aggregator

cjwxslw · Post by **cjwxslw** » Tue Nov 09, 2010 9:18 am

hi,vesna!
thank for your interpretation!
and from what your said, that is to say, if I want to add the correlation of shear and torsion to the relative command during the analysis, I have to change the source codes according to the pertinent formula?
furthmore, can the others commands realize the interaction of shear and torsion?

vesna · Post by **vesna** » Tue Nov 09, 2010 9:32 am

Hi Chen,

At the moment there is no material in OpenSees that accounts for shear-torsion interaction. As you pointed out, the only way to account for it is to make your own material that will take care of shear-torsion interaction. If you make such a material please share it with us.