3.1.5.21. TDConcreteMC10

This command is used to construct a uniaxial time-dependent concrete material object with linear behavior in compression, nonlinear behavior in tension (REF: Tamai et al., 1988) and creep and shrinkage according to fib Model Code 2010.

uniaxialMaterial TDConcreteMC10 $matTag $fc $fct $Ec $Ecm $beta $tD $epsba $epsbb $epsda $epsdb $phiba $phibb $phida $phidb $tcast $cem

Argument	Type	Description
$matTag	integer	integer tag identifying material
$fc	float	concrete compressive strength (compression is negative)
$fct	float	concrete tensile strength (tension is positive)
$Ec	float	concrete modulus of elasticity at loading age
$Ecm	float	concrete modulus of elasticity at 28 days
$beta	float	tension softening parameter (tension softening exponent)
$tD	float	analysis time at initiation of drying (in days)
$epsba	float	ultimate basic shrinkage strain (input as negative) as per fib Model Code 2010
$epsbb	float	fitting parameter of the basic shrinkage time evolution function as per fib Model Code 2010
$epsda	float	product of ultimate drying shrinkage strain and relative humidity function as per fib Model Code 2010
$epsdb	float	fitting parameter of the basic shrinkage time evolution function as per fib Model Code 2010
$phiba	float	parameter for the effect of compressive strength on basic creep as per fib Model Code 2010
$phibb	float	fitting parameter of the basic creep time evolution function as per fib Model Code 2010
$phida	float	product of the effect of compressive strength and relative humidity on drying creep as per fib Model Code 2010
$phidb	float	fitting parameter of the drying creep time evolution function as per fib Model Code 2010
$tcast	float	analysis time corresponding to concrete casting (in days; minimum value 2.0)
$cem	float	coefficient dependent on the type of cement as per fib Model Code 2010

Note

1. Compressive concrete parameters should be input as negative values (if input as positive, they will be converted to negative internally).

2. Shrinkage concrete parameters should be input as negative values (if input as positive, they will be converted to negative internally).

See also

Detailed descriptions of the model and its implementation can be found in the following: (1) Knaack, A.M., Kurama, Y.C. 2018. Modeling Time-Dependent Deformations: Application for Reinforced Concrete Beams with Recycled Concrete Aggregates. ACI Structural J. 115, 175-190. doi:10.14359/51701153 (2) Knaack, A.M., 2013. Sustainable concrete structures using recycled concrete aggregate: short-term and long-term behavior considering material variability. PhD Dissertation, Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana, USA, 680 pp A manual describing the use of the model and sample files can be found at: https://data.mendeley.com/datasets/z4gxnhchky/5