BuildingTcl -- PlasticHingeLengthModel

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GaussLobattoIntegrationWeights -- gives the same hinge length as the force-based beam-column element with 4 integration points
Lp=0.05*ElementLength
Priestley96 --
Lp1 = 0.08*(ElementLength)+0.15*(fY_ksi)/(Db);
Lp2 = 0.3*(fY_ksi)*(Db);
Lp = min(Lp1,Lp2)
Berry06 --
Lp1 = 0.05*(ElementLength) + 0.26*(fY_ksi)*(Db)/(fpc_ksi)^2
Lp2 = 0.25*(ElementLength)
Lp = min(Lp1,Lp2)
Mattock67 --
Lp = 0.05*(ElementLength) + 0.5*(ElementDepth)
HOver2 --
Lp = 0.5*(ElementDepth)
HOver1 --
Lp = 1.0*(ElementDepth)
Point05L --
Lp = 0.05*(ElementLength)
Point08L --
Lp = 0.08*(ElementLength)

The following are calculated internally:

ElementLength
individual-element length
fY_ksi
yield strength of the longitudinal reinforcement in the section in ksi (if not specified in section = 60ksi)
Db
diameter of longitudinal reinforcement in the section (if not specified in section = 1.0)
fpc_ksi
nominal compressive strength of concrete in section (if not specified in section = 4.0 ksi)
ElementDepth
depth of cross section (if not specified in section = 0.)