Lagrange Nodes

[duttaANURAG]

In the excavation example in the OpenSees Website, they have created Lagrange Nodes in the 2nd Step to enforce the Contact Condition between the Master and Slave Nodes.

The command for creating Lagrange Nodes as stated in the example is as follows -

#-----------------------------------------------------------------------------------------

# 3. CREATE LAGRANGE MULTIPLIER NODES FOR BEAM CONTACT ELEMENTS

#-----------------------------------------------------------------------------------------



for {set k 1} {$k <= 42} {incr k 1} {

node [expr 1000+$k] 0.00 0.00

}

puts "Finished creating all -ndf 2 nodes..."


Here in the above step, I am not being able to understand the second step - node [expr 1000+$k] 0.00 0.00

What does 0.00 0.00 signify here? Is it the coordinates of the point from where lagrange nodes are starting?

Please help me.

Your kind help will be appreciated a lot.

Thank You.