midas civil_detail analysis

7/25/2019 Midas Civil_Detail Analysis

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Contents

midas Civil

1. Detail analysis in midas Civil

2. Nonlinear Static Analysis in midas Civil

midas FEA

1. Detail analysis in midas FEA

2. Creaking Analysis in midas FEA

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Bridging Your Innovations to RealitiesMidas Civil

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Detail analysis in midas Civil

Analysis Capability of midas Civil

Static Analysis

Construction Stage Analysis

Moving Load Analysis

Modal Analysis

Linear Buckling Analysis

Transient / Frequency / Spectrum Response Analysis

Material / Geometry Nonlinearity Analysis

Reinforcement Analysis

Heat Transfer Analysis


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Available Detail Analysis in midas Civil

Linear Static Analysis Nonlinear Static Analysis

Buckling AnalysisHeat Transfer Analysis

& Heat of Hydration Analysis


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Nonlinear static analysis

High end analysis functionsto represent nonlinearbehaviors of structures afterelastic limits

Various hardening models,which define the behaviorsfrom the elastic limits to

maximum stress points(Isotropic hardening,Kinematic hardening &Mixed hardening)

Various failure modelsfrequently encountered incivil engineering practice(Tresca, Von Mises, Mohr-

Coulomb & Drucker-Prager) Cyclic Load function using

the loading sequencefunction to represent thenonlinear behaviors ofstructures subjected to cyclicloads


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Nonlinear Shell Element

Good convergence for nonlinearanalysis using shell elements, whichreflect large displacements & largerotations

Representation of material

nonlinearity of degenerated shellelements by integrating stresses inthe thickness direction using alayered approach

Plastic zone display function, whichshows the status of yielding of shellelements in the thickness directionto obtain detail information on

material nonlinearity Material & geometric nonlinear

analysis functions to carried outdetail analyses of steel structuresconsisted of steel box, steel plate & I-beam sections


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Simultaneous analysis of geometric & material nonlinearity

Analysis results of a reduced

symmetry model expanded to

a full model to observe

nonlinear behaviors &

deformed shape using the

Mirror function View function supported to

display plastic zones to identify

the status of yieldingat

integration points

Animation function provided to

examine rather large

deformation & stress

redistribution in real time Results of geometric - material

nonlinear analysis readily

verified by Stage/Step History

Graph Material &


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- Steady State Analysis

- Time Transient Analysis

Heat of Hydration Analysis

- Thermo-elastic Analysis

- Maturity, Creep, Shrinkage,Pipe Cooling


Thermal Analysis

Without Cooling Pipes With Cooling Pipes


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Nonlinear Static Analysis in midas Civil

Plastic Material Model

Tresca & von Mises

suitable for ductile materials such as metals, which

exhibit plastic incompressibility

Mohr-Coulomb & Drucker-Prager

suitable for materials such as concrete, rock and

soils, which exhibit volumetric plastic deformations


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Hardening Rule

Isotropic hardening

In the case of isotropic hardening, the yield surface

expands uniformly

Kinematic hardening

In the case of kinematic hardening, the size of the yield

surface remains unchanged and the center location of the

yield surface is shifted

Mixed hardeningMixed hardening is a hardening type, which represents

the mix of isotropic hardening and kinematic hardening


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Nonlinear Analysis Control

Number of load steps

- General control

-Load step by load cases

Iteration Method

- Newton-Raphson

- Arch-Length-Displacement-Control

Convergence Criteria

- Energy Member force x displacement) Norm

- Displacement Norm

- Force Norm


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Loading Sequence and Combination for Nonlinear Analysis

Loading Sequence

Sequence of applying load cases to a

geometric nonlinear analysis. Specified loadingsequence is effective only when Newton-

Raphson is selected as the Iteration Method

Load Combination for Nonlinear Analysis

Generate load case using predefined load

combination to apply the load simultaneously

in nonlinear analysis


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Demonstration

midas FEA

midas Civil

Model

-Unit : N, mm

-Isotropic Elastic Material

-Plate Element

Load & Boundary Conditions

-Pressure

-Constraint

Overview


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Detail analysis in midas FEA

Analysis Capability of midas FEA

Static Analysis

Construction Stage Analysis

Moving Load Analysis

Modal Analysis

Linear Buckling Analysis

Transient / Frequency / Spectrum Response Analysis

Material / Geometry Nonlinearity Analysis

Interface Nonlinearity Analysis

Reinforcement Analysis

Cracking Analysis

Static/Explicit Contact Analysis


Fatigue Analysis

Fluid Dynamics Analysis


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Applicable Problems

General detail FE analysis (linear static/dynamic analysis of concrete and steel)

Buckling analysis of steel structure with material and geometric nonlinearity

Detail analysis of composite structure (steel + concrete)

Thermal analysis and differential shrinkage analysis of steel-concrete composite girder, concrete filled steel

tube and core of the SRC pier and so on

3D detail analysis considering steel, concrete and reinforcement simultaneously

Detail analysis of CFT and analysis of the long-term behavior

(differential settlement)

Crack initiation and propagation in concrete structure Discrete modeling and analysis of masonry

Composite modeling and analysis of wall in shear

Detail analysis for tendon anchorage

General Detail Analysis (Linear, Material/Geometry Nonlinear)

Concrete, Interface and Reinforcement Nonlinear Analysis


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Applicable Problems

Analysis of heat of hydration (general, special, nonlinear)

Detail analysis for assessment of shear capacity of pavement (de-bonding failure)

Analysis of thermal effect due to the asphalt pavement (guss asphalt)

Fire effect on a reinforced concrete slab

Evaluation of residual stress and integrity of welded part

Crack and fatigue analysis of the surface of structures

Damage estimation of pier/waterbreak impacted by ship

Life-cycle prediction of steel-box bridges based-on moving load analysis

Fluid dynamics analysis of bridges, high-rise buildings and tunnels

Semi-coupled fluid-structure interaction analysis

Direct analysis of soil-structure interaction

High-end detail analysis (crash, fatigue, fracture mechanism)

Thermo-Elastic Analysis (Heat Transfer, Heat of Hydration)

Special Analysis (CFD, Contact, Fatigue, etc.)


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Framework of midas FEA

Work Window

Output

Window

Property

Window

Works Tree

Main MenuTabbed

Toolbar

Task

Pane

Table

Window


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Frame to Solid/Plate Model

Convert frame model

and PSC section types

in midas Civil into

plate/solid models in

midas FEA

Convert tendon profiles

and embed them as

bars from midas Civilinto midas FEA


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Mesh Generation

Includes advanced meshing

function : Auto-Mesh, Map-

mesh & manual generation

Mesh extraction method from

2D/3D mesh sets or directly

from a geometry object

Capability of generating 3Dmesh for complex shapes using

2D Mesh sets


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Automatic Surface/Solid Meshing

Supports advanced meshing

functions for complex

geometry modeling : Manifold

and on-manifold shapes

Provides advanced mesh

function such as Hybrid

Meshing, Sub-Meshing as

well as Auto-mesh, Map-mesh Fast mesh generation:

200,000 tetra elements per-

minute


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Mesh Size Control/Quality Assurance

Various size control functions

available to modify density of

nodes and elements for complex

geometry or variation of material

properties

Advanced size control functions

such as Adaptive Seeding, which

automatically controls mesh

density based on shape

characteristics

Standard Mesh quality and

assurance features to detect

incompatibility or poor element

quality


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Application Area


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Application Area


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Fatigue Analysis

Fatigue Analysis : Display

structure failure phenomenon

based on a cyclic loading pattern

with reduced yield strength

Calculate stress amplitude

Applying Rainflow Counting & S-

N Curve Calculating the fatiguelife (life cycle) and extent of

damage


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CFD Analysis

Investigate bridges stability

resistance to wind by visually

determining airflow pattern

Perform Steady state analysis /

Unsteady analysis and Laminar

Flow / Turbulence Flow analysis

Calculate aerodynamic forcecoefficients and determine

pressure distribution &

turbulence kinetic energy


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Cracking Analysis

Includes TSC (Total Strain Crack)

for concrete crack analysis: Fixed

and Rotating models

Includes Reinforcement Analysis

to portray the main concrete

tension reinforcement

Incorporate impact of rebar in

tensile behavior of concretestructures

Include analysis results and

visualization of crack pattern,

direction and status of the

element


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Crack Model

Fixed Rotating

Lateral Crack Effect

In cracked concrete, large tensile strains perpendicular

to the principal compressive direction reduce the

concrete compressive strength.

Tension Function

Elastic, Linear, Multi-linear, Exponential, Hordijk,

Constant, Brittle

Compression Function

Elastic, Multi-linear, Linear Hardening, Parabolic,Satiratopm. Thorenfeldt

Hordijk Thorenfeldt

Cracking Analysis in midas FEA

Total Strain Crack Model


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Reinforcement Material Properties


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Analysis Results in midas FEA

Von Mises Stress Plasticity Status

Reinforcement Stress Crack Pattern


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Load-Deflection Diagram


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Demonstration


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Comparison between midas Civil and FEA

Comparison Chart

Analysis Type Midas Civil Midas FEA

Linear static analysis V V

Eigenvalue analysis V V

Dynamic analysis V V

Reinforcement analysis

V*

(No embedded reinforcement,No tendon in plate/solid elements)

V

Heat of hydration analysis V V

Interface nonlinear analysis N/A V

Contact analysis N/A V

Nonlinear static analysis V V

Cracking analysis N/A V

Fatigue analysis N/A V

Heat transfer/stress analysis V V

CFD analysis N/A v


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Comparison between midas Civil and FEA

Comparison Chart

Pre/Post-Processing Midas Civil Midas FEA

Plate/ShellV*

(No high order element)V

SolidV*

(No high order element)V

Curved line/plate elements N/A V

Interface element N/A V

Embedded element N/A V

Surface Mesh

(Auto-mesh, Map-mesh,

Hybrid Mesh, Sub-Mesh)

V*

(No Hybrid mesh and sub-mesh)V

Solid Mesh

(Auto-mesh, Map-mesh,

Hybrid Mesh, Sub-Mesh)

V*

(No Hybrid mesh and sub-mesh)V

Mesh Size Control N/A V

Mesh Quality Assurance N/A V

Iso Surface Plot V V

Local Direction Force Sum V V

Extract result in a table V V


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midas civil_detail analysis

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