I have to study the seismic behaviour of suction caisson for offshore application. Unfortunately I have a poor knowledge of soil; it's a normal consolidated clay and I know just averange trends of Su, Vs and density with depth. I know, also, 2 value of PI: 70 for the first 10 m depth, and about 40 for greater depth. the maximum depth in which I have these parameters is 30 m. My suction caisson is 15 m long.
I want to use Kinematic Hardening Constitutive Model with Von Mises failure criterion (I.Anastasopoulos; F. Galagoti; R. Kourkoulis; G. Gazetas) for my investigation.
I can use this simply through material library of Abaqus just setting parameters or I have to encode this with user-defined subroutine?
If I can do define just with Abaqus material library, how can I do?
I calibrated your model with Vucetic and Dobry shear modulus-strain curve for my PI values.
If someone responds to message will be very helpful for me.
Regard
While you can make some progress using the Von Mises model, seismic loading will lead to the cyclic build up of pore pressure and reduced foundation strength. You need a model based on effective stresses to model this type of failure. There is a book about this type of modelling: Computational Geomechanics with Special Reference to Earthquake Engineering byO. C. Zienkiewicz,, A. H. C. Chan,, M. Pastor,, B. A. Schrefler, & T. Shiomi (Wiley, 1999).
you can try plaxis dynamic module version 8.2
it can clearly define the different failure simple mode in dynamic with all parameters
hello davide, I Have a similar problem for modeling soil in abaqus. If you solve your problem, can you help me?
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