김경종
60 lines
2.6 KiB
Markdown
60 lines
2.6 KiB
Markdown
---
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type: concept
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title: "Midas Civil Nonlinear Time History and Hysteresis Models"
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created: 2026-06-02
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updated: 2026-06-02
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address: c-000166
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aliases:
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- MIDAS Civil nonlinear time history
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- midas Civil hysteresis models
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tags:
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- concept
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- finite-element-method
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- midas-civil
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- dynamics
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- nonlinear-analysis
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status: current
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related:
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- "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
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- "[[midas Civil]]"
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- "[[Direct Time Integration Methods]]"
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- "[[Transient Dynamic Elasto-Plastic Analysis]]"
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- "[[Abaqus Metal Plasticity Models]]"
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sources:
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- "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
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source_refs:
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- source: "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
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raw_path: ".raw/MidasCivilAnalysisReference/"
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raw_files:
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- "MidasCivilAnalysisReference_025.md"
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md_indices:
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- 25
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match: "heuristic-heading-keyword"
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confidence: high
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---
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# Midas Civil Nonlinear Time History and Hysteresis Models
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## Definition
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Midas Civil nonlinear time history and hysteresis models are the direct dynamic analysis procedures and inelastic component laws used when member, link, truss, or fiber behavior changes during a time-dependent load history.
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## How It Works
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The manual describes nonlinear equations of motion, nonlinear static initialization, initial section-force consideration, initial stiffness options, and Newton-Raphson iteration with or without convergence calculation. Inelastic components include inelastic beams, inelastic General Links, and inelastic trusses.
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Hysteresis options include bilinear, trilinear, tetralinear, origin-oriented, peak-oriented, Clough, Takeda-family, slip, Ramberg-Osgood, and Hardin-Drnevich models. Multi-axial hinge models include kinematic hardening and P-M or P-M-M interaction. Fiber models include steel and concrete constitutive models for section response.
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## Solver Development Notes
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- Time integration, nonlinear iteration, and hysteresis state update must share one accepted-state timeline.
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- Hysteresis laws need explicit unloading/reloading rules; a yield surface alone is not enough.
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- Multi-axial hinge interaction requires robust section-force mapping and yield-surface projection.
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- Fiber sections require material-point state management inside a member-level element.
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## Connections
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- [[Direct Time Integration Methods]] gives the transient integration base.
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- [[Transient Dynamic Elasto-Plastic Analysis]] connects inertia and plasticity.
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- [[Abaqus Metal Plasticity Models]] and [[Abaqus Geomaterial and Concrete Plasticity]] provide constitutive comparison points.
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