zerolength direction

[sualim]

Hi~

I wandering the zerolength direction

for example

0 @ ------------------@ 0 (nodeN is 2 --------- 3)
@
|
|
|
@
0 (nodeN is 1) <- this is ground
@ is zerolength, 0 is master node

# master node
node 1 0 0 0
node 2 0 2 0
node 3 2 2 0

# zerolength node
node 10 0 0 0
node 20 0 2 0
node 21 0 2 0
node 22 2 2 0

I will put the same hysteretic loop in zerolength 10 and 20 (because of same column)

my question is when I use the zerolength commend, iNode is master node???

element zeroLength $eleTag $iNode $jNode
element zeroLength 1 1 10 <- this is below of column' zerolength
element zeroLength 2 2 20 <- this is top of column' zerolength is it right?? or
element zeroLength 2 20 2 <- this is top of column' zerolength is it right??

plz help me

and is the output using the recorder commend of zerolength section the force on global coordinate???

[fmk]

where are you getting the idea of a master node when using zeroLength elements .. the element has 2 ends; an end1 and an end2 .. when you ask to record "forces" you get the global forces.

[sualim]

thank you for the reply

so is it right "element zeroLength 2 20 2 " ??

( node 20 is zerolength node of top of column and a node 2 is a nodal point connecting a column and a beam)

[fmk]

is what right .. i cannot make out the node numbers from your figure .. you really should not have to ask this question