uniaxialMaterial('Masonry', matTag, Fm, Ft, Um, Uult, Ucl, Emo, L, a1, a2, D1, D2, Ach, Are, Ba, Bch, Gun, Gplu, Gplr, Exp1, Exp2, IENV)

This command is used to construct a uniaxialMaterial Masonry (Crisafulli, 1997; Torrisi, 2012), which is a uniaxial hysteretic constitutive model for Masonry developed by Crisafulli (1997) and modified by Torrisi (2012).

matTag (int)

integer tag identifying material

Fm (float)

Compression strength of Masonry (Fm<0)

Ft (float)

Tension Strength of Masonry (Ft>0)

Um (float)

Strain at maximum Strength (Um<0)

Uult (float)

Maximum compression strain (Uult<0)

Ucl (float)

Crack Closing strain (Ucl>0)

Emo (float)

Initial Elastic Modulus

L (float)

Initial Length (just add 1.0)

a1 (float)

Initial strut area as ratio of initial area (=1)

a2 (float)

Ratio of residual strut area as inicitial strut area (Final area / Initial Area)

D1 (float)

Strain where strut degradation starts (D1<0)(For strain>D1 Area/Initial Area=a1)

D2 (float)

Strain where strut degradation ends (D2<0) (For strain <D2 Area/Initial Area=a2)

Ach (float)

Hysteresis parameter(0.3 to 0.6) See Crisafulli’s thesis

Are (float)

Strain reloading factor (0.2 to 0.4) See Crisafulli’s thesis

Ba (float)

Hysteresis parameter(1.5 to 2.0) See Crisafulli’s thesis

Gun (float)

Stiffness unloading factor (1.5 to 2.5) See Crisafulli’s thesis

Gplu (float)

Hysteresis parameter(0.5 to 0.7) See Crisafulli’s thesis

Gplr (float)

Hysteresis parameter(1.1 to 1.5) See Crisafulli’s thesis

Exp1 (float)

Hysteresis parameter(1.5 to 2.0) See Crisafulli’s thesis

Exp2 (float)

Hysteresis parameter(1.0 to 1.5) See Crisafulli’s thesis

IENV (int)

Envelope: =0: Sargin stress-strain envelope descending branch; =1: Parabolic stress-strain envelope descending branch