4.14.5.36. Masonry

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