PressureDependMultiYield03 Material

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(The reference for PressureDependMultiYield03 material: Khosravifar, A., Elgamal, A., Lu, J., and Li, J. [2018]. "A 3D model for earthquake-induced liquefaction triggering and post-liquefaction response." Soil Dynamics and Earthquake Engineering, 110, 43-52)

PressureDependMultiYield03 is modified from PressureDependMultiYield02 material to comply with the established guidelines on the dependence of liquefaction triggering to the number of loading cycles, effective overburden stress (Kσ), and static shear stress (Kα). Element drivers for single element simulations under undrained cyclic, undrained monotonic, drained cyclic and drained monotonic loading can be downloaded from here.

nDMaterial PressureDependMultiYield03 $tag $nd $rho $refShearModul $refBulkModul $frictionAng $peakShearStra $refPress $pressDependCoe $PTAng $mType $ca $cb $cc $cd $ce $da $db $dc <$noYieldSurf=20 <$r1 $Gs1 …> $liquefac1=1. $liquefac2=0. $pa=101 <$s0=1.73>>

$ca, $cb, $cc, $cd, $ce Non-negative constants defining the rate of contract or pore pressure buildup. See Tables 1 and 2 below for more information.
$da, $db, $dc A non-negative constant reflecting Kσ effect.
$contrac2 Non-negative constants defining the rate of dilation. See Tables 1 and 2 below for more information.
$mType 0: Triaxial Compression; 1: Triaxial Extension; 2: Direct Shear
$s0 Numerical constant (default value = 1.73 kPa). See Tables 1 and 2 below for more information.
Others See PressureDependMultiYield02 material above and Tables 1 and 2 below.

Table 1 provides the proposed calibrated input parameters for PressureDependMultiYield03 for four different relative densities. Table 2 provides a brief description for each parameter and the adopted calibration procedure.

Table 1. Model Input Parameters

Pdmy03 table1.png

*These are not input parameters to the constitutive model, but rather parameters computed during model calibration.

Table 2. Description of Calibration Parameters

Pdmy03 table2.png

Code Developed by: UC San Diego (Dr. Zhaohui Yang):

UC San Diego Soil Model: