Paras Khaitan's Communities Activities

Hardening Soil Model - Typicial relationships between E50, Eur, and Eoed

Alexandra Martinez — Wed, 24 Feb 2021 12:07:15 GMT

Dear all,

Sometimes, when I am using the Hardening Soil model I receive an error message similar to the following one:

I assume that the program does an internal check accoding to usual models to know if the input values are realistic or not.

Where can I find these internal checks?

Kind regards and thank you in advance,

Alexandra

Tunnel Analysis

Paras Khaitan — Wed, 03 Mar 2021 18:43:50 GMT

How do the results compare for Thick lining vs Plat lining?

I performed the analysis and got following results. Not sure if additional post-processing calcs are required.

In the snapshots above, picture 1 is for Plate lining and picture 2 is for Volume Plate (Thick Lining)

The order of Magnitude varies by almost 1000.

The Axial force N is the axial force along the element axis.

Paras Khaitan — Sat, 27 Feb 2021 03:33:36 GMT

I was wondering what is the meaning of Element axis in PLAXIS 2D. The subject statement was in the Manual.

So my question comes from a tunnel evaluation.

For my tunnel, forces are generated.

1) The hoop stress is in out of plane direction. So which direction is Axial? If that is also in Z, should I just add hoop and Axial? I have included a snap of local axis incase that is needed.

2) If axial is not in Z, is it tangential?

Following are questions for future reference

If Axial is in Z, then if I model a horizontal slab (Plate element), is the element axis still Z?

Can I just use the load generated by the Soil volume and tell PLAXIS to not evaluate the soil volume at all?

Paras Khaitan — Sun, 13 Dec 2020 17:09:00 GMT

I have modeled this complex volume with slope embankments and retaining walls. Within the mesh I am getting 13 warning for elements being smaller than the mesh size. The goal is to use the load generated by this complex volume on top of the culvert running underneath this soil volume. For some reason when I try staged analysis, it fails. Any recommendations as to what I can do with the soil volume above the culvert? I tried making it rigid. That's not helping.

Also, if someone from PLAXIS can guide me as how I can directly get support from their support team then that would be helpful.

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Sun, 13 Dec 2020 10:46:09 GMT

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