Giuffre-Menegotto-Pinto Model with Isotropic Hardening – stl_gmp

This is a uniaxial Giuffre-Menegotto-Pinto Material with optional isotropic hardening described by a non-linear rule. The transition from elastic to plastic behaviour is described by the Giuffre-Menegotto-Pinto Model. The material model was described in full detail by Filippou et al. [1983]. The material should be mainly utilized for the modelling of the behaviour of reinforcing steel in reinforced concrete structures, especially in the case when load reversals occur.

Users have to assign the mean value of steel strength and the mean value minus the standard deviation or the characteristic value in order to describe the mechanical characteristics of the existing or the new material respectively.