![]() ![]() ![]() Option 2 is tested using a cantilever beam with its free end supported by a point spring with unsymmetric backbone curve. For more info refer online help manual - Question 2: As suggested by you, Option 1 cannot be used since soil curves are non-linear. So for tension, x is in negative and if the spring has to compression only then y- ordinate corresponding to tension would be zero. i.e compression is positive so for positive input in x stiffness in y should be provides. the second option is using the multi-linear spring itself with unsymmetrical properties. As highlighted in the image below, the first option of directly selecting compression only spring and the stiffness could be enters. Answer:Dear User, This can be done in two ways. ![]() How do we ensure that the lateral springs (p-y) are deactivated when subjected to lateral tension force (since soil cannot take tension) under the test load. As you will note from the model, we are using multi-linear point spring supports with the following backbone curves - Symmetric for T-z (friction), Unsymmetric for Q-z (bearing with Dz:-ve) and p-y (lateral). We are trying to perform soil-structure interaction analyses of a pile bent with 54-inch cylinder piles embedded into this soil system. Question: How do we simulate compression-only multi-linear springs for modeling p-y,T-z, and Q-z curves of a multi-layered soil system.
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