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+---
+type: concept
+title: "Midas Civil Special Load and Design Utilities"
+created: 2026-06-02
+updated: 2026-06-02
+address: c-000171
+aliases:
+  - MIDAS Civil special utilities
+  - midas Civil support settlement and wave loads
+tags:
+  - concept
+  - finite-element-method
+  - midas-civil
+  - bridge-analysis
+  - loads
+status: current
+related:
+  - "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
+  - "[[midas Civil]]"
+  - "[[Midas Civil Moving Load Bridge Analysis]]"
+  - "[[Midas Civil PSC and Prestress Loss Analysis]]"
+  - "[[Abaqus Structural Optimization and Parametric Studies]]"
+sources:
+  - "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
+---
+
+# Midas Civil Special Load and Design Utilities
+
+## Definition
+
+Midas Civil special load and design utilities are the analysis-reference workflows that sit around the core FE solve: support-settlement combinations, before/after composite-section analysis, unknown-load optimization, arbitrary-shape column design, and wave-load generation.
+
+## How It Works
+
+Support settlement auto-consideration generates settlement cases or combinations. Steel composite section before/after composite analysis changes section stiffness as composite action develops. Unknown load solution uses optimization to identify loads that satisfy target responses. Arbitrary-shape column design includes moment magnification, long-column effects, braced/unbraced classification, 3D P-M interaction, and shear design. Wave load generation includes offshore member wave forces and wave theories such as Airy, Stokes, stream function, cnoidal, and solitary waves.
+
+## Solver Development Notes
+
+- Some production features are model generators or postprocessors rather than new FE equations.
+- Optimization-based load identification needs a clear objective, constraints, design variables, and verification against the recovered target response.
+- Design utilities require traceable mapping from FE force output to code-check quantities.
+- Wave and settlement generators should be tested at the load-vector/envelope level before full-structure tests.
+
+## Connections
+
+- [[Midas Civil Moving Load Bridge Analysis]] is another load-generation workflow.
+- [[Midas Civil PSC and Prestress Loss Analysis]] shares staged section and bridge-design concerns.
+- [[Abaqus Structural Optimization and Parametric Studies]] gives a broad optimization comparison point.