Floor to wall connections - eesd-epfl/OpenSees GitHub Wiki
If zeroLengthND elements are used for modelling floor-to-wall connections, a simple material model for frictional interfaces is defined in the library BeamFrictionSupport.dll.
The local direction x of this material defines the direction in which the vertical load is acting. In the perpendicular plane frictional sliding is allowed, ruled by a friction coefficient mu (no cohesion is modelled). The material can fail, losing also load-bearing capacity if the sliding in positive direction y (beam direction) a maximum slip is exceeded. Also, the material can model pounding of the beam when the slip in negative direction y or any direction z exceeds a “gap” value that can be imposed.
The input structure is:
nDMaterial BeamFrictionSupport $matTag $E $G $mu <-anchoring $dx> <-gap $gapY $gapZ>
Where:
| matTag | material tag |
| E, G | penalty stiffnesses of the interface in x and y-z directions, respectively |
| dx | (optional) maximum slip in positive y direction before contact is lost (default: infinite) |
| gapY, gapZ | (optional) maximum slip in negative y or z direction before pounding occurs and the stiffness is restored (default: infinite) |
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