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hi：
everyone,
how can i get the total stiffness matrix and element stiffness matrix , can anybody give me some advice.
thanks .

hi:
everyone,
I want to modify some element stiffness matrix ,then analyse the structure again . can I do it in tcl ？ or anyway I can achieve it?

thanks a lot.

i have found the problem , the version is not right.

i have found the problem , the version is not right.

Hi: everyone when i conduct a sensitivity analysis of the 2D RC frame given in http://opensees.berkeley.edu/wiki/index ... excitation, a error happens. invalid comand name "sensitivityIntegrator" while executing "sensitivityIntegrator -static" can anybody give me some advice. i w...

Hi: everyone when i conduct a analysis of the 2D RC frame given in http://opensees.berkeley.edu/wiki/index.php/Example_3:_2D_RC_frame_subjected_to_earthquake_base_excitation, a error happens. invalid comand name "sensitivityIntegrator" while executing "sensitivityIntegrator -static&qu...

thank you very much

is there some example in the user doc , i can't find any of it, it will help a lot if there are some Specific examples.

Hi all,
I'm trying to simulate the stage construction process with opensees, i konw how to do it in Ansys . but i am not sure whether opensees can do it just like ANSYS ,or there are some other efficient way to do it ,can anybody give some advice to me,I will be thankful.

is that means that i have to Write code for a new material by myself

hi
i am going to model the concrete creep with opensees ,but i am not sure whether it has this kind of material .so can anyone give me some adveice .I wound be thankful.

hi mhm i am going to simulate the stage construction process with opensees too, but i can't found a very Effective way, i know how to remove a element from the Structure，but don't know how to add a element to the Structure, can you tell me your way to simulate the stage construction process . anyway...