https://communities.bentley.com/members/bfa769b9_2d00_2207_2d00_476d_2d00_8b33_2d00_97f503299358Mahmoud Alhayek's recent activityen-USTelligent Community 12https://communities.bentley.com/achievements/460ac7df-7ccc-4c42-a204-9e05eef3be09Mon, 07 Feb 2022 06:48:25 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:da2c08ec-7dae-44a9-94ac-061a052443f2Ask a question in a forum.https://communities.bentley.com/products/geotech-analysis/f/forum/225461/modeling-prandtl-1920-undrained-bearing-capacity-condition-in-plaxis-3d-and-2dMon, 07 Feb 2022 10:07:36 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:23bfbc63-b644-47b8-9df6-6d939bd697f5Mahmoud Alhayek<p>Hello,</p> <p>I was trying to model Prandtl 1920 standard case for the bearing capacity untill failure of strip footing stands on the surface of undrianed clay soil with Eu = 200 Su , Su = 100 kn/m2, and vu = 0.499. The expected value is 5.14 x Su.</p> <p>The value i got in Plaxis 2D was 5.19xSu which is very close value. But when i tried to model the same case&nbsp;for a square footing using plaxis 3D, i get a doubled value of 11.1 x Su which is unrealistic.</p> <p>I would like to ask what is the best way to model the bearing capacity untill failure of square or rectangular footings?</p><div style="clear:both;"></div>