Command for gap material problem

[semon]

Hi Everyone,

I am trying to use the command explained below which is from OpenSees command manual for the expansion joint in between a bridge. What is E and Fy for . Is it for concrete material that is used for deck?

This command is used to construct an elastic perfectly-plastic gap uniaxial material object.

uniaxialMaterial ElasticPPGap $matTag $E $Fy $gap <$eta> <damage>

$matTag unique material object integer tag
$E tangent stiffness
$Fy stress or force at which material reaches plastic state
$gap initial gap (strain or deformation)
$eta hardening ratio (=Eh/E), which can be negative
damage a switch to accumulate damage in the material. If damage is
omitted, default value, the gap material "re-centers" on load
reversal.

[semon]

Does anyone has an example of model that uses this command? Please share your experience and idea.

Thank you

[clairelove]

Hi,have u found the solution yet? 'Cause I also want to use ppgap material and truss for the expansion joint in the bridge, and I don't know how to set the gap value and the distance between the gap nodes. Is there any relationship between this two value. Thanks in advance.

[shenxian]

i have same reference material,if you need it ,please send e-mail to shenxian6586@126.com.