I used the concreteZ01, and its performance is good.

[borjiajia]

Thank you for your previous answers. And now I have new problems.
I used the ConcreteZ01 and SteelZ01 which are written by UT, and the results turn out to be satisfying.
But there still two problems confused with me.

1, after running the programs, part of it shows as follows, I never run into this, what may the reason be?
#-------------------------------------------------------------------------------------
approachFiveToComStrain = 0
reloadPath = 1
zeta = 1
reverseFromOneStrain = -0.000266248
reverseFromOneStress = 0
fiveToOneStrain = -1.#IND
ConcreteZ01::getApproachFiveToComStrain -- No intersection of reloading path wi
h descending branch!
ConcreteZ01::getApproachFiveToComStrain -- overflow the iteration limit!
ConcreteZ01::getApproachFiveToComStrain -- can not get approachFiveToComStrain!

approachFiveToComStrain = 0
reloadPath = 1
zeta = 1
reverseFromOneStrain = -0.000372723
reverseFromOneStress = 0
fiveToOneStrain = -1.#IND
#--------------------------------------------------------------------------------------

2, In case a node named node A already has vertical displacement,then I want to run displacement control and the control node is node A.
Is it workable?

[vesna]

1. I never used ConcreteZ01 so i do not know what is the meaning of the messages that ConcreteZ01 prints out.

2. I think it is.