Stiffness Matrix of Structure

AryanRZRD · Post by **AryanRZRD** » Mon Sep 29, 2014 6:22 am

Dear Users
i want OpenSees to give me the Stiffness Matrix of the structure in Global Coordinate System.
can anyone help me ?
regards

Post by **fmk** » Mon Sep 29, 2014 7:44 am

use the printA and make sure you have a full matrix. note the printA returns the matrix in the matrix equation, if you want the stiffness matrix you must be using a static integrator.

http://opensees.berkeley.edu/wiki/index.php/PrintA

AryanRZRD · Post by **AryanRZRD** » Mon Sep 29, 2014 9:38 am

Dear Frank
i want to get output of global stiffness matrix of a structure at the end of the severe earthquake in order to know how reduction has been occurred in the stiffness and strength.
how can i reach to this ?

AryanRZRD · Post by **AryanRZRD** » Mon Sep 29, 2014 11:05 am

and what about Mass Matrix ?

Post by **fmk** » Tue Sep 30, 2014 9:13 am

http://opensees.berkeley.edu/community/ ... =2&t=61841

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Stiffness Matrix of Structure

Stiffness Matrix of Structure

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