Nodes with different Degree of Freedom

[reza378salami]

Hi all,
In my code I have soil nodes with 4DOF, (3 translation and 1 pore pressure) which is connected to Zero Length element node with 3DOF. From the error I found out that in Zero Length elements, nodes must have equal degree of freedom. What is your solution for this? How can I connect these nodes?
thank you.

[vesna]

The model command can be used many times in the model to define different DOF regions. To solve your problem just issue 2 model commands. After one command build the model for the zero-lenght element, after the other build the model for the soil elements. When you are done tie whatever nodes you need to from the 2 models with the equalDOF command.

[reza378salami]

thanks vesna,