Hi all,
I have some questions regarding the interface elements in Plaxis.
01. Soil interface elements is used to represent the soil structure interaction. These interface elements reduce strength and stiffness. Based on reference manual it is stated that if no any information 0.67 is needed to take (normally this is for the concrete soil interaction). What is the source for this Rinter value disregarding of type of material is used?
02. Any idea of the simple model to model in Plaxis 2D and study the effect of interface elements in strength and stiffness reduction?
03. I provided plate element with Rinter is 0.2. When see the deformed mesh at true scale, the top part of the structure and soil has gap and when go down soil is seemed to be deformed in front of the plate. Is it possible?
Thanks.
Dear Nitharshan,
1) It doesn't say that a value of 0.67 is needed, it suggest that a value of 0.67 may be used. Or any other value if you like.
2) That highly depends what effect and on what. I can think of dozens of models that can be used to investigate specific aspects.
3) It is possible within the framework how interfaces are defined.
With kind regards,
Dennis Waterman
Dear Mr. Dennis,
Thanks for the reply.
Yeah for 01 as mentioned in my question, 0.67 is used if no information is there. It was based on some references. So just ask the reference source.
I don't have the actual reference, but I know it's based on the friction angle of interaction between frictional soil and walls. There are tables of friction angle of interaction for different soils. The R_inter can be calculated as R_inter = tan(phi_interaction) / tan(phi_soil) which on average is 0.67. Unfortunately I don't have more detailed information by hand.
Thanks for the reply and I have found some sources for that one. Please refer attached screenshot.