ConcreteTsai
Uniaxial Concrete Model Using Tsai's Equation
The ConcreteTsai
model is a simple concrete model using Tsai's equation.
Syntax
material ConcreteTsai (1) (2) (3) (4) (5) (6) (7) (8) (9) [10]
# (1) int, unique material tag
# (2) double, elastic modulus
# (3) double, compression strength, should be negative but sign insensitive
# (4) double, tension strength, should be positive but sign insensitive
# (5) double, NC
# (6) double, NT
# (7) double, middle point, typical: 0.2
# (8) double, strain at compression strength, typical: -2E-3
# (9) double, strain at tension strength, typical: 1E-4
# [10] double, density, default: 0.0
History Variable Layout
Since it is derived from the SimpleHysteresis
model, they share the same history variable layout.
Remarks
The middle point parameter represents the size of hysteresis loop, valid values range from 0 to 1 (ends not recommended).
There is no additional consideration for small loops, which is available in
ConcreteCM
.
Usage
material ConcreteTsai 1 3E4 30 20 2 2 .8 2E-3 2E-3
materialTest1D 1 1E-4 50 100 120 140 160 180
exit
material ConcreteTsai 1 3E4 30 20 2 2 .1 2E-3 2E-3
materialTest1D 1 1E-4 50 100 120 140 160 180
exit
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