contact between concrete and steel

[matrixiraq]

hi all
my project about composite member (concrete and steel)
steel tube with concrete core .... or I steel section encase with concrete .... my problem use contact element between them (real constant"Ks and Kn , and with GUI )im want any paper to find real constant and to use this element
yhank you for help
matrix

 

[matrixiraq]

why no one help me?????????????????????????????/

 

[balu25]

hello,
try ceintf command
hope it helps