Shear interface recorders - eesd-epfl/OpenSees GitHub Wiki

Used to ask a recorder to the in-plane shear spring.

Any output that an nDMaterial can handle can be requested (standard: “stress”, “strain”). Only the first two directions of the nDMaterial are used, but the output can be longer if the dimension of the material is bigger than 2. The implemented shear models have a dimension 2, where the first element is the axial response and the second is the shear response.

Further outputs that can be asked, only to the shear models implemented in the Macroelement, are the four terms of the stiffness matrix (k₁₁,k₁₂,k₂₁,k₂₂, flag “tangent”) and the state variables defining the shear response. The flag to be use for both is “state” or “stateVariables”. In the case of the Gambarotta-Lagomarsino model the output is the current value of the parameter α, defining the shear damage, that is >1 in the postpeak range. For the model presented in the paper, it is the current value of x, with similar meaning.

# only for NoTensionSection3d    
# only for GambarottaLagomarsino or ShearDamage    
recorder Element -file "fName1" -ele $eTag shear tangent  
recorder Element -file "fName2" -ele $eTag shear state

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