P–Y Springs Without the Manual Work: From Borelogs to Seismic Analysis in CIVIL NX

Automate the iterative process of P–Y spring updates and seismic analysis with MIDAS CIVIL NX.

Response spectrum analysis with nonlinear springs traditionally requires repeated manual iterations. Engineers must run the analysis, review the resulting displacements, update each spring by hand, and repeat the process until the solution converges.

CIVIL NX now automates this iterative workflow. Set a convergence tolerance and let CIVIL NX handle the iteration automatically. The software recalculates the secant stiffness from the P–Y curve and continues the response spectrum analysis until the change falls within the specified tolerance.

During this live session, see how P–Y springs can be built directly from borelog information, followed by an iterative response spectrum analysis that automatically updates spring stiffness as the solution converges.

The converged stiffness will also be checked against a hand iteration, providing a clear step-by-step comparison between the automated and traditional workflows.

Follow the complete workflow from P–Y spring generation to automated seismic analysis.

Step 1

Build P–Y Springs

Build P–Y springs directly from borelog information and prepare them for use in the seismic analysis workflow.

Step 2

Iterative Seismic Analysis

Run the response spectrum analysis while CIVIL NX automatically recalculates secant stiffness and continues the iteration toward convergence.

Step 3

Converged Stiffness Check

Compare the converged stiffness from CIVIL NX against a hand iteration, step for step, to verify the automated result.

Let CIVIL NX Handle the Iteration

Set a convergence tolerance and let CIVIL NX automatically update the secant stiffness from the P–Y curve until the response spectrum solution reaches the specified tolerance.