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wiki/sources/Midas-Civil-Analysis-Reference.md

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+---
+type: source
+title: "Midas Civil Analysis Reference"
+source_type: manual
+publisher: "[[MIDAS Information Technology]]"
+product: "[[midas Civil]]"
+created: 2026-06-02
+updated: 2026-06-02
+address: c-000157
+aliases:
+  - MIDAS Civil Analysis Reference
+  - midas Civil Analysis Reference
+  - Midas Civil Vol 2 Analysis Reference
+tags:
+  - source
+  - finite-element-method
+  - midas-civil
+  - bridge-analysis
+  - structural-analysis
+status: current
+raw_path: ".raw/MidasCivilAnalysisReference/"
+source_files:
+  markdown_files: 57
+  markdown_bytes: 1027489
+  image_files: 1448
+  image_bytes: 19216843
+related:
+  - "[[MIDAS Information Technology]]"
+  - "[[midas Civil]]"
+  - "[[midas FEA]]"
+  - "[[midas NFX]]"
+  - "[[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]]"
+  - "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
+  - "[[Midas Civil Numerical Analysis Model]]"
+  - "[[Midas Civil Element Library and Section Stiffness]]"
+  - "[[Midas Civil Boundary Supports and Links]]"
+  - "[[Midas Civil Dynamic and Seismic Analysis]]"
+  - "[[Midas Civil Boundary and Material Nonlinear Analysis]]"
+  - "[[Midas Civil Construction Stage and Time-Dependent Analysis]]"
+  - "[[Midas Civil Heat of Hydration and Thermal Stress Analysis]]"
+---
+
+# Midas Civil Analysis Reference
+
+## Scope
+
+This source is Volume 2, Analysis Reference, for [[midas Civil]], a civil-structure analysis and design product from [[MIDAS Information Technology]]. The raw source covers the numerical analysis model, coordinate systems, element types, element stiffness data, boundary conditions, static and dynamic analysis, buckling, nonlinear analysis, construction stages, heat of hydration, PSC analysis, moving loads, and special bridge/civil utilities.
+
+The manual is useful in this vault because it complements [[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]] and [[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]. Midas FEA is a detail nonlinear finite element reference; midas Civil is a bridge/civil structural analysis reference that emphasizes member models, staged construction, seismic procedures, prestressing, moving loads, settlement, composite sections, wave loads, and design-oriented postprocessing. Midas NFX is the general-purpose MIDAS reference for broader element, field, contact, fatigue, optimization, and forming-limit solver workflows.
+
+## Extracted Threads
+
+- [[Midas Civil Numerical Analysis Model]] - nodes, finite elements, boundary data, and modeling responsibility.
+- [[Midas Civil Element Library and Section Stiffness]] - truss, cable, beam, plane, plate, solid, and section-property stiffness data.
+- [[Midas Civil Boundary Supports and Links]] - nodal constraints, surface springs, elastic links, general links, rigid links, rigid end offsets, and specified displacements.
+- [[Midas Civil Dynamic and Seismic Analysis]] - eigenvectors, Ritz vectors, damping, response spectrum, and time-history procedures.
+- [[Midas Civil Buckling P-Delta and Geometric Nonlinearity]] - eigenvalue buckling, P-Delta effects, and large-displacement solution context.
+- [[Midas Civil Boundary and Material Nonlinear Analysis]] - nonlinear supports, Newton-Raphson, arc-length, plasticity, and hardening choices.
+- [[Midas Civil Pushover and Performance Evaluation]] - static incremental seismic performance workflow.
+- [[Midas Civil Nonlinear Time History and Hysteresis Models]] - inelastic members, general links, trusses, hysteresis laws, interaction surfaces, and fiber models.
+- [[Midas Civil Construction Stage and Time-Dependent Analysis]] - staged activation, creep, shrinkage, strength development, and suspension bridge equilibrium.
+- [[Midas Civil Heat of Hydration and Thermal Stress Analysis]] - heat transfer, hydration heat, equivalent age, concrete strength, thermal strain, shrinkage, and creep.
+- [[Midas Civil PSC and Prestress Loss Analysis]] - tendon forces, anchorage slip, friction, elastic shortening, relaxation, and time-dependent losses.
+- [[Midas Civil Moving Load Bridge Analysis]] - lanes, traffic surface lanes, vehicles, and load-placement rules.
+- [[Midas Civil Special Load and Design Utilities]] - settlement combinations, before/after composite sections, unknown-load optimization, column design, and wave loads.
+
+## Solver Development Value
+
+For custom solver development, this manual is valuable as a requirements checklist for bridge and civil structural solvers. It shows that a production solver feature must define not only equations, but also model topology, local/global coordinate conventions, support/link semantics, section stiffness inputs, construction-stage state transfer, load generation rules, output interpretation, and verification examples against theory or reference programs.
+
+## Connections
+
+- [[Finite Element Method]] gives the shared discretization base.
+- [[Finite Element Program Implementation]] frames model input, assembly, solution, recovery, and output contracts.
+- [[Static Equilibrium Equation Solvers]], [[Direct Time Integration Methods]], and [[Finite Element Eigenproblem Solvers]] connect to the analysis procedures.
+- [[Finite Element Thermal Stress Analysis]] connects to hydration and temperature-change stress workflows.
+- [[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]] provides a sibling MIDAS product reference for detail FE analysis.
+- [[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]] provides a sibling MIDAS product reference for general-purpose FE analysis.