An introduction about capacities and features of midas Civil: an integrated solution software for bridge and civil engineering

1. Bridging Your Innovations to Realities
Integrated Solution System for Bridge and Civil Structures

2. MIDAS Program Applications
Nastran FX midas Civil
Total Solution for Integrated Solution System for
True Analysis-Driven Design Bridge and Civil Structures
midas FX+ midas FEA
General Pre & Post Processor Advanced Nonlinear and
for Finite Element Analysis Detail Analysis System
midas Abutment
Abutment Automatic
Burj Khalifa (UAE)
Design System
World’s tallest building to date
Height: 800 m, 160 floors
Mechanical Bridge midas Pier
Pier Automatic Design System
midas Deck
Pier Automatic Design System
midas Gen midas GTS
Integrated Design System for Geotechnical and
Building and General Structures Tunnel analysis System Beijing Olympic Stadium (CHINA)
Area: 78,000 sq. m.
Building Geotechnical Allowed Capacity: 91,000 people
midas Building midas GeoX
A revolutionary building specific Temporary shoring & Settlement
design system with auto-drafting analysis System for Excavation
modules
Soil+
midas ADS (CTC in Japan)
Shear wall type Building
Design System
midas SDS
Slab & basemat Design Sutong Bridge (CHINA)
System World’s longest cable stayed bridge to date
Total span: 8,206 m
midas Set
Structural engineer’s tools

3. Headquarters Branch Offices Sales Office
MIDAS IT
Russia China (Seoul) Japan
Lithuania USA
(Beijing) (Tokyo) (New York)
TNO DIANA Shenyang Seattle
(Netherlands) Slovenia
India Sacramento New Jersey
Spain Italy
Turkey (Mumbai)
Chengdu
Shanghai
Guangzhou Taiwan
UAE KOZO KEIKAKU ENGINEERING Puerto Rico
Vietnam ITOCHU Techno-Solutions Mexico
Thailand JIP Techno Science Venezuela
CREA-TEC Colombia
Malaysia
Cybernet Systems
Singapore
Brazil
Bolivia
MIDASoft USA / New York MIDAS IT China / Beijing MIDAS R&D Center India / Mumbai MIDAS IT Japan / Tokyo
45 Broadway, Suite 1130 Rm.1307, 13th Floor, Fangyuan 56(Yi), 804 & 805, 8th Floor, Maithili's Signet, Akiba-mitakikan 8th fl., 4-5-5
New York, NY 10006, USA Zhongguancun Nan da Jie Haidian Plot No. 39/4, Sector 30A Vashi, Sotokanda, Chiyoda-ku, Tokyo,
+1 212 835 1666 / midasoft@midasuser.com District, Beijing, China Navi Mumbai – 400705 101-0021, Japan
+86 010 51658210 / beijing@midasuser.com +91 22 6721 1001~3 / india@midasuser.com +81 3 5207 6388 / midas_japan@midasit.com

6. 01. Innovative user interface
midas Civil
Bridging Your Innovations to Realities
"Stretch your imagination & extend your ideas without restrictions.
midas Civil will help you achieve the goals."
midas Civil - Framework
Task Pane
A new concept tool, which enables the user to freely set
Full graphical representation
Works Tree Main Menu Tabbed Toolbars Context Menu optimal menu systems
of all shapes
A new concept menu system comprising frequently used menus
Display of line & plane type
Procedural sequence defined by the user for maximum efficiency
section shapes
Auto-links to manuals, technical papers and tutorials
Combined analysis results &
design display Links to corresponding dialog boxes for ease of checking input data
Hidden view processing of
a user-specified section
Walk Through Mode
Model rendering provided in various
view points
Command Line
Modeling function similar to AutoCAD commands
Modeling by One Key commands
Output Window
Property Window
Possible to change assigned properties of a selected entity / item
Simultaneous display of various results in post-processing
5 MIDAS
Modeling, Integrated Design & Analysis Software

7. 01. Innovative user interface
midas Civil
Bridging Your Innovations to Realities
"Stretch your imagination & extend your ideas without restrictions.
midas Civil will help you achieve the goals."
midas Civil - Graphic User Interface
Visualization Designer
A new concept graphical tool, which enables the user to freely combine and manipulate analytical model and results Graphical means to freely select, remove and add domain, plane, line & point information
desired by the user
Generation of a variety of model views by unit functionality (Contour, Iso Surface, Cutting, etc.)
Analysis results creatively expressed in numerous ways using unit functionality Visualization support tool, which generates various scenes in a selected domain
Simulation Wizard, which saves and regenerates the total process of graphics generation Mouse operation replacing the use of dialog boxes for frequently used modeling functions
Horizontal
Cutting
Visualization Visualization
Multi-selection of Cutting planes Clip Box + Contour + Contour Line Multi Clip + Cut Plane + Property Color
Designer Designer
Vertical
Cutting
Universal
Widget
Multi Cutting Plane View
midas Civil Clip Box + Iso Surface Contour + Cut Plane + Glyph
Graphic User Interface
MIDAS 6
Modeling, Integrated Design & Analysis Software

8. 02. Optimal solutions for bridges
midas Civil
Bridging Your Innovations to Realities
"One Stop Solution for practicing bridge engineers
with RC, steel & PSC design"
Design process for bridge design Reinforced Concrete design (beam / column)
Bridge analysis and design are carried out in an iterative process
Analysis Design Optimal solution provided for analysis & design
Iterative Process
Modeling
Analysis
Design
Steel Design RC Design PSC Design
Stress calculations for Beam / column section check Flexural strength check
user-defined sections Irregular column section design Shear strength check
Combined stresses due to axial & Auto-recognition of braced Torsional strength check RC section check report RC section detail check report
bending (all sections in database) conditions of columns Reinforcing steel calculation &
Combined stresses due to bending tendon check
& shear (all sections in database) Summary of construction stage
results
RC / Steel / PSC design per AASHTO LRFD
Iterative analyses for calculating optimal sections & rebars
Optimized Design One stop solution combining static & dynamic analyses carried out in a same file with member design
7 MIDAS
Modeling, Integrated Design & Analysis Software

9. 02. Optimal solutions for bridges
midas Civil
Bridging Your Innovations to Realities
"One Stop Solution for practicing bridge engineers
with RC, steel & PSC design"
RC design (Irregular column section check) Steel Design (combined stress checks)
Section types in database User-defined irregular column sections Section types in database User-defined irregular sections
Section defined by coordinates
Rebars defined by coordinates
Tower Model of irregular section Column check (PM interaction plot)
Graphical results of stress checks
Various column sections provided (box, pipe, solid round, octagon, etc.)
Stress checks for user-defined sections
Column checking for user-defined sections
Combined stress check for bending & shear (all sections in database)
Auto-calculation of braced condition
Combined stress check for axial & bending (all sections in database)
Design check for maximum forces with corresponding force components
MIDAS 8
Modeling, Integrated Design & Analysis Software

10. 02. Optimal solutions for bridges
midas Civil
Bridging Your Innovations to Realities
"One Stop Solution for practicing bridge engineers
with RC, steel & PSC design"
Optimal design reflecting change in boundaries for different loading & analysis conditions Application Example: Design of a subway structure
Boundary Change Assignment to
Load Cases/Analyses
Static analysis Dynamic analysis
A single analytical
model
Change in boundary conditions / section
stiffness by loading conditions & analysis types Normal support condition Support condition for seismic analysis
A single analytical model Application examples
Frame bridge analysis for normal & seismic conditions
Subway tube analysis for normal & seismic conditions
Simultaneous static & seismic analyses of bridges with bearing isolators
Analysis results for normal condition (moment) Seismic analysis results (moment)
Separate analyses by analysis cases
Analysis
Separate analyses by load cases
RC / Steel / PSC Design (AASHTO LRFD)
Design
Optimized Design Optimal member design (beam / column)
RC section check results
Application Example: a unified analysis for a subway structure
A single analysis file, which handles different boundary conditions or section stiffness for different loading Change in boundary conditions by load cases and RC design feature used
conditions or analysis types
Simultaneous static & dynamic analyses for an FCM bridge with seismic bearing isolators
Optimal member design using load combination results of a unified model
Section design of bridge piers & towers
9 MIDAS
Modeling, Integrated Design & Analysis Software

11. 03. PSC bridge design
midas Civil
Bridging Your Innovations to Realities
"Integrated solution for practical PSC bridge design
(Longitudinal & transverse direction analyses and strength checks)"
Procedure and main features for PSC bridge design Automatic generation of transverse analysis model
Global Transverse Partial
Global analysis Transverse Integrated solution End
Strength check analysis along model modification RC design
along the spans analysis for PSC bridge design the spans generation of model data of design
Construction stage analysis reflecting change in elements, boundary conditions & loadings
Creep & shrinkage calculation based on codes
Time dependent steel relaxation (CEB-FIP, AASHTO, Magura & JTG 04)
Irregular sections displayed to true shapes
3D/2D tendon placement assignment
(lumped representative tendon analysis)
Strength check to AASHTO LRFD Generation & analysis
Defining positions for transverse analysis Transverse analysis model wizard of a transverse model
Confinement effect of rebars considered for creep
Auto-calculation of section properties considering effective width
Easy generation of non-prismatic tapered sections over the entire
or partial spans
FCM Bridge
Beam stress check for PSC bridges
Automatic reaction summary at specific supports through
staged launching in ILM bridges
Compression-only element provided for modeling RC design for a selected member Excel format calculation report Input / Output tables
temporary supports & precasting platform (future release)
Completed state analysis reflecting effective width by
construction stages Auto generation of transverse analysis models through global analysis models
Special type of PSC bridge analysis (extradosed bridge) Transverse analysis model generation wizard & auto generation of loading and boundary conditions
(transverse tendon assignment)
Automatic generation of transverse analysis model
Automatic placement of live load for transverse analysis
RC design of irregularly shaped columns
Extradosed Bridge Automatic positioning of loadings for plate analysis
Section check using RC / PSC design function
MIDAS 10
Modeling, Integrated Design & Analysis Software

12. 03. PSC bridge design
midas Civil
Bridging Your Innovations to Realities
"Integrated solution for practical PSC bridge design
(Longitudinal & transverse direction analyses and strength checks)"
Modeling features suited for practical design (1) Modeling features suited for practical design (2)
Auto generation of non-prismatic Automatic calculation
Display and design of irregular sections tapered sections of effective width
Auto generation of tapered
Irregular section defined by user using SPC sections based on bridge Automatic calculation of effective width
Schedule-based input of rebars for PSC bridges
spans
PSC wizard reflecting design practice Lumped representative tendon analysis
3D tendon profile placement
2D placement of tendons using
the representative tendon function
Tendon profile input and real-time display
Convenient auto generation of tapered sections (change in thicknesses of top/bottom flanges and web
Modeling PSC bridges of irregular sections using Section Property Calculator separately considered)
PSC bridge wizards (FCM, ILM, MSS & FSM): user-defined tendons & sections possible Construction stage analysis and completed state analysis reflecting auto calculated effective width
Exact 3D tendon and simplified 2D tendon placements
11 MIDAS
Modeling, Integrated Design & Analysis Software

13. 03. PSC bridge design
midas Civil
Bridging Your Innovations to Realities
"Integrated solution for practical PSC bridge design
(Longitudinal & transverse direction analyses and strength checks)"
Automatic strength check Various analysis results for practical design
Design parameters for strength check
Tension losses in tendons Tendon loss graph
PSC bridge-specific stress diagrams
Maximum normal stress distribution for a PSC bridge
Bending strength
check
Analysis results table
Analysis results graph Principal stress distribution for a PSC bridge
PSC bridge-specific stress output
AASHTO LRFD specifications Separate immediate and time-dependent tension losses by tendons (graphs & tables)
Bending strength, shear strength & torsional strength checks
Generation of tendon weights and coordinates (calculation of tendon quantity)
Transverse rebars check and resistance & factored moment diagrams
Normal / principal / shear / inclined stresses using PSC Stress Diagram command
Stress check for completed state by construction stages
Generation of erection cambers
Generation of member forces & stresses by construction stages and maximum & minimum stresses summary
Summary of reactions at specific supports in ILM bridges
Excel format calculation report (future release)
MIDAS 12
Modeling, Integrated Design & Analysis Software

14. 03. PSC bridge design
midas Civil
Bridging Your Innovations to Realities
"Integrated solution for practical PSC bridge design
(Longitudinal & transverse direction analyses and strength checks)"
Special type of PSC bridges (1) Special type of PSC bridges (2)
Construction stage analysis of an extradosed bridge (FCM) Construction stage analysis of an extradosed bridge (FSM)
1 2
Analysis results of a completed state model Construction Stage Analysis
Control dialog box
Construction stage analysis - tower erection Construction stage analysis - staged construction 1
of girders
3 4 Construction stage analysis - FSM
2
Construction stage analysis - cable erection
3
Construction stage analysis - cable erection Completed state model
Construction stage analysis - removal of shoring
Compression-only element provided to reflect the effects of temporary bents
Construction stage analysis reflecting time-dependent material properties and pre-tensioning forces
Calculation of section properties of an irregular section using AutoCAD and SPC
External type pretension loads provided for inducting cable tensioning forces
Calculation of normal / principal / inclined stresses using the Beam Stress (PSC) command
13 MIDAS
Modeling, Integrated Design & Analysis Software

15. 04. Cable bridge analysis
midas Civil
Bridging Your Innovations to Realities
"Optimal solution for cable bridge analysis (completed state
& construction stage analyses with advanced analysis functions)"
Optimal solution for cable bridge analysis Initial equilibrium state analysis for cable stayed bridges
Generation of optimal cable pretension forces
Cable Stayed Bridge satisfying design constraints
Initial equilibrium state analysis
1
1 Cable nonlinearity considered (equivalent truss, 1 Optimum solutions produced by an optimization theory based
nonlinear truss & catenary cable elements) on object functions
Calculation of initial pretensions for cable stayed 2 Solutions obtained by simultaneous equations if the numbers
bridges & initial shape analysis for suspension bridges 2
2 of constraints and unknowns are equal
Construction stage analysis reflecting Optimum stressing strategy
geometric nonlinearity
3
Finite displacement method (P-delta analysis by cons-
truction stages and for completed state)
1 Auto generation of construction stage pretensions Large displacement method (independent models for back-
using the tensions in the completed state ward analysis & forward construction stage)
(linear & nonlinear)
2 Behaviors of key segments in real construction reflected Completed state analysis & tower
Ideal dead load force diagram assumed
3 Large displacement analysis reflecting creep & shrinkage / girder design
Linearized finite displacement method & linear elastic
method
Linear buckling analysis / moving load analysis / inelastic
dynamic analysis
Steel column design of irregular sections
4
5 Initial equilibrium state analysis results satisfying constraints
4 Backward construction stage analysis using internal member
6 forces (reflecting large displacement)
5 Auto calculation of tensions in main cables and coordinates for
self-anchored and earth-anchored suspension bridges Optimal initial pretensions generated to satisfy desired girder, tower & cable force and displacement
Detail output for suspension cables (unstressed lengths, sag, constraints
etc.) & detail shape analysis
6 Steel column design of irregular sections
MIDAS 14
Modeling, Integrated Design & Analysis Software

16. 04. Cable bridge analysis
midas Civil
Bridging Your Innovations to Realities
"Optimal solution for cable bridge analysis (completed state
& construction stage analyses with advanced analysis functions)"
Construction stage analysis for cable stayed bridges Construction stage analysis for cable stayed bridges
01 - Forward stage analysis using the pretensions in the completed state 02 - Forward stage analysis based on application of constraints
STEP 01. Calculation of pretensions using Procedure for a construction stage analysis
Unknown Load Factor
Construction Stage 1
Unit pretension loads applied Iteration
Unknown Load Factor
Assignment of constraints & calculation of unknown
load factors for each stage (good convergence) 2
Optimal tensions in cables found satisfying constraints
STEP 02. Forward stage analysis for a cable stayed bridge using the pretensions Construction Stage
of the completed state and Lack of fit force Re-analysis of construction stage 3
reflecting influence factors
1 2
Check
Analysis of results for each construction stage
Construction stage analysis results - initial erection Construction stage analysis results - cantilevers erected 1 Set up constraints and unknowns
2 Load Factors found
3 4 End
3 Iteration control
Construction stage analysis results - closure of side spans Construction stage analysis results
- immediately before center span closure
5
Construction stage analysis results Analysis results of the completed state
Construction stage analysis results - final stage Completed state analysis results - Moment
Auto calculation of erection pretensions by entering only the pretensions of the completed state & adding
Lack of fit force without having to perform backward analysis Calculation of cable pretensions by construction stages satisfying the constraints for the completed state
Applicable for both large displacement and small displacement analyses Auto-iterative function provided to reflect creep & shrinkage
Initial equilibrium state analysis reflecting the behaviors of the closure of key segments during erection Superb convergence for calculating unknown load factors using simultaneous equations & object functions
Auto calculation of construction stage pretensions accounting for creep & shrinkage
15 MIDAS
Modeling, Integrated Design & Analysis Software

17. 04. Cable bridge analysis
midas Civil
Bridging Your Innovations to Realities
"Optimal solution for cable bridge analysis (completed state
& construction stage analyses with advanced analysis functions)"
Initial shape analysis for suspension bridges Construction stage analysis of earth anchored suspension bridges
Procedure for accurate analysis method
Structure (elements, nodes, materials, loads
& boundary conditions)
Cable (unstressed lengths & iteration
convergence conditions)
Geometric nonlinear analysis Accurate analysis of initial
Structural stiffness, loads & internal forces shape performed to satisfy
un-equilibrated forces calculated the coordinates of towers and sags
A self-anchored suspension Accurate analysis method
using Suspension Bridge Nodal displacements & member Initial tension forces in cables of a suspension bridge
bridge model using Suspension forces calculated
Bridge Wizard Analysis Control
Backward construction stage analysis - large displacement analysis
Control for convergence 1 2
(rate of change in
displacements)
Updated nodal coordinates revised
Revised nodes & member forces Removal of superimposed dead load Removal of main span girders
unstressed lengths recalculated
Equilibrium forces calculated
for each member (internal member forces)
3 4
Nodal coordinates updated
Unstressed lengths of cables determined
Equilibrium member forces determined
for each member Removal of side span girders Removal of side span girders completed
Initial shape model of a suspension bridge
5 6
Conventional earth anchored suspension bridges - initial shape analysis performed in Wizard through
simple method / accurate analysis
Initial shape analysis function for special suspension bridges with hangers located on different planes
(accurate analysis)
Removal of main span girders Removal of hangers & setback calculation
Shape analysis function reflecting initial member forces of self anchored suspension bridges
MIDAS 16
Modeling, Integrated Design & Analysis Software

18. 04. Cable bridge analysis
midas Civil
Bridging Your Innovations to Realities
"Optimal solution for cable bridge analysis (completed state
& construction stage analyses with advanced analysis functions)"
Construction stage analysis of self anchored suspension bridges Cable Bridge Analysis Options
1
3
Initial shape analysis
Initial tension forces of a self anchored suspension bridge 2
Backward construction stage analysis - large displacement analysis
1 Final Stage 2 Stage 05
3 Stage 04 4 Stage 03 1 Large displacement analysis by construction stages
Independent Stage: backward analysis (independent model)
Include Equilibrium Element Nodal Force: backward analysis reflecting internal forces (independent model)
Accumulative Stage: Accumulative model for forward analysis
P-delta analysis by construction stages
Include P-delta Effect Only (2nd release in 2006)
5 Stage 02 6 Erection bents,
main cables &
girders installed 2 Reflection of tangential girder erection
Initial Tangent Displacement for Erected Structure (fabrication camber calculated)
Auto calculation of cable tensions by construction stages
Lack of fit force control: construction stages using tensions in the completed state automatically produced
Accurate analysis with initial member forces to reflect the behavior of a self anchored suspension bridge
subjected to axial forces in girders
Typical construction methods applicable for self anchored suspension bridges such as hanger insertion and 3 Cable-Pretension Force Control
Jack-down construction methods Initial Force: Initial tensions inducted into as internal forces (inducted loads internal cable forces)
External Force: Initial tensions inducted into as external forces (inducted loads = internal cable forces)
17 MIDAS
Modeling, Integrated Design & Analysis Software

19. 05. Nonlinear analysis
midas
Bridging Your Innovations to Realities
Civil "Seismic & earthquake resistant system and seismic performance
evaluation for bridges using high-end nonlinear analysis"
Nonlinear analysis process in midas Civil Various dynamic analysis functions
Nonlinear seismic analysis and
performance evaluation for bridges
Nonlinear material properties & plastic hinge properties
of members
Approximate dimensions / section profile
Analysis model data (hysteresis models, yield strengths, PM interaction &
/ material properties post yielding behavior properties)
Finite elements (beam, column, plate & solid)
Structural model of a bridge Inelastic spring properties (stiffness, effective damping
ratios & hysteresis properties)
3
Definition of input loads Static loads & inelastic response spectrum 1
(damping & ductility ratio)
Acceleration time histories & artificial seismic waves)
2
Basic seismic design
Nonlinear static analysis Boundary nonlinear Inelastic time history
(pushover analysis) analysis analysis
1 Multi-spectrum input
Load control Direct integration Definition of a number of response spectrum load cases using different
Seismic control Seismic isolation design spectrums
Viscoelastic LRB Spectrum values corresponding to modal damping ratios
Displacement control Hysteretic FPS Inelastic element
Performance
2 Response spectrums & interpolation considering modal damping ratios
Effective stiffness
Damping Beam-Column Modal damping ratio applied using correctional equation if a single spectrum
Inelastic response spectrum /effective damping device
Time Step hysteretic properties selected
Lumped Hinge Type
Seismic performance Interpolation of spectrum load data used if a number of spectrums specified
evaluation Effective Damping
Seismic isolation Distributed Hinge Yype
Ductility
Spring, Truss 3 Consistent mass consideration
Capacity spectrum method Nonlinear modal analysis Both lumped mass & consistent mass available
Displacement coefficient method Newmark -
- Linear acceleration method Mass specified at the neutral axis of a member regardless of Mass Offset or
Displacement based design method Section Offset
Runge-Kutta method - Average acceleration method
Response evaluation Response evaluation Response evaluation
Staged reactions, member Eigenvalues (natural frequencies) Displacement, velocity & acceleration time history
forces, stresses, displacements,
Seismic isolator & damper hysteresis loops, Inelastic hinge distribution
plastic hinge distribution
Displacement, velocity & acceleration time history Member curvature & rotational ductility
& system displacement ductility In addition to lumped mass, Mass Offset & Consistent Mass also considered
A number of response spectrum loads defined using different design spectrums
Accurate behavior analysis using nonlinear
seismic response of a bridge Various methods for applying damping for time history analysis (Direct Modal, Mass & Stiffness Proportional,
Strain Energy Proportional, Element Mass & Stiffness Proportional)
Seismic performance Seismic resistance Accurate seismic
evaluation & isolation system evaluation safety evaluation
MIDAS 18
Modeling, Integrated Design & Analysis Software

20. 05. Nonlinear analysis
midas Civil
Bridging Your Innovations to Realities
"Seismic & earthquake resistant system and seismic performance
evaluation for bridges using high-end nonlinear analysis"
Boundary nonlinear analysis Analysis capabilities for dampers & base isolators
Viscoelastic Damper Lead Rubber Bearing Isolator
Lead Rubber Bearing Friction Pendulum System Hysteretic System
Hysteretic System Friction Pendulum System Isolator
Viscoelastic Damper Runge-Kutta method analysis condition
Structural analysis function including nonlinear link elements (General Link)
Structural analysis using spring elements having nonlinear properties (Inelastic Hinge Property) Dampers, base isolators & inelastic elements simultaneously considered in nonlinear time history
analysis (nonlinear direct integration method)
Various dampers & base isolators (Gap, Hook, Viscoelastic Damper, Hysteretic System, Lead Rubber
Bearing Isolator & Friction Pendulum System Isolator) Good convergence by Runge-Kutta method (Step Sub-Division Control & Adaptive Stepsize Control)
Static loads converted into the form of dynamic loads (Time Varying Static Loads)
19 MIDAS
Modeling, Integrated Design & Analysis Software

21. 05. Nonlinear analysis
midas Civil
Bridging Your Innovations to Realities
"Seismic & earthquake resistant system and seismic performance
evaluation for bridges using high-end nonlinear analysis"
Nonlinear time history analysis Numerous inelastic hysteresis models
4 Hinge type models Inelastic hysteresis models in midas Civil
Lumped type hinge Spring type hinge Uni-axial hinge model Multi-axial hinge model
Distributed type hinge Truss type hinge 19 Models provided including bi-linear, tri-linear, Translational hardening type model
Clough, slip models, etc / fiber model
Takeda Tri-linear Clough Deg. Tri-linear
Auto generation of plastic Evaluation of ductility
hinge properties demand for members
Various nonlinear
hysteresis models
Input for nonlinear Origin-Oriented Peak-Oriented Slip Ramberg Osgood
analysis conditions
Accurate analysis by simultaneously considering nonlinear & time dependent properties of members to
evaluate seismic safety Nonlinear time history analysis function, which uses linear static & construction stage analysis results as
initial section forces (initial section forces reflected in hysteresis)
Good convergence achieved through applying stable direct integration method & numerical iterative method
Over 50 built-in earthquake acceleration records in DB & import of artificial seismic waves Generation of tables & graphics for versatile nonlinear analysis results
(hinge distribution, max. & min. displacement / velocity / acceleration, time history graphs, simulations
Versatile nonlinear analysis results (hinge distribution, max. & min. displacement / velocity / acceleration, & production of various events)
time history graphs & simulations)
MIDAS 20
Modeling, Integrated Design & Analysis Software

22. 05. Nonlinear analysis
midas Civil
Bridging Your Innovations to Realities
"Seismic & earthquake resistant system and seismic performance
evaluation for bridges using high-end nonlinear analysis"
Nonlinear time history analysis Dynamic nonlinear analysis reflecting axial force - moment interaction
Auto setting of yield surface & auto calculation of yield properties Translational hardening type model (translation of yield surface)
Translation of 1st yield surface after 1st yielding Translation of 1st yield surface at unloading
RC Type Steel Type
Translation of 2nd yield surface after Translation of 2nd yield surface after
2nd yielding on the +ve side 2nd yielding on the -ve side
Nonlinear dynamic analysis considering axial force - moment interaction
Variable axial force considered (PMM): translational hardening type model by plasticity theories
Fixed axial force considered (PM)
Initial axial forces considered (P-M) Variable axial forces considered (P-M-M)
21 MIDAS
Modeling, Integrated Design & Analysis Software

23. 05. Nonlinear analysis
midas Civil
Bridging Your Innovations to Realities
"Seismic & earthquake resistant system and seismic performance
evaluation for bridges using high-end nonlinear analysis"
Nonlinear dynamic analysis using fiber models Versatile & convenient definition of fiber section & division
A bridge model using fiber elements Stress-strain relationships for concrete & steel
RC Section PSC Section
Moment-curvature relationship of a fiber element Versatile & convenient
Concrete Filled Section Hollow Steel Section
section damage assessment
Limitation of nonlinear hinge models eliminated, which are based on experience such as pushover analysis,
seismic analysis, etc.
Change in axial forces accurately reflected through fiber models in structures whose axial forces change
significantly
Efficient fiber division function for various sections such as rectangular, circular & PSC sections
Accurate representations of confinement effects of tie reinforcing steel, crushing, cracking, etc. in concrete
members under nonlinear analysis Simple representation of reinforcing steel using the Import function
Accurate representations of tensile yielding, compressive yielding, buckling, fracture, etc. in steel members
under nonlinear analysis
Analytical models for optimal retrofit reinforcement to existing structures such as plate reinforcement
MIDAS 22
Modeling, Integrated Design & Analysis Software

24. 05. Nonlinear analysis
midas Civil
Bridging Your Innovations to Realities
"Seismic & earthquake resistant system and seismic performance
evaluation for bridges using high-end nonlinear analysis"
Nonlinear static analysis Nonlinear shell element
1
−s 1 2 sin f 6c cos f
F= I1 + J 2 -
3
Von Mises F = 3J2 - Y F = t - (c + s n tan f ) 3 ( 3 - sin f ) 3 ( 3 - sin f )
Hydrostatic Axis
Tresca F=( 1 -
3) Y
2 −s 3
3
1
2 −s 2
Von Mises - Tresca Mohr-Coulomb Drucker-Prager
Material nonlinear properties Cantilever beam with Pinched cylinder Hemispherical shell with a hole
channel section
Load-Deflection curve Yield states along thickness
Nonlinear analysis control Results of a cyclic loading test
High end analysis functions to represent nonlinear behaviors of structures after elastic limits Good convergence for nonlinear analysis using shell elements, which reflect large displacements &
large rotations
Various hardening models, which define the behaviors from the elastic limits to maximum stress points
(Isotropic hardening, Kinematic hardening & Mixed hardening) Representation of material nonlinearity of degenerated shell elements by integrating stresses in the
thickness direction using a layered approach
Various failure models frequently encountered in civil engineering practice
(Tresca, Von Mises, Mohr-Coulomb & Drucker-Prager) Plastic zone display function, which shows the status of yielding of shell elements in the thickness direction
to obtain detail information on material nonlinearity
Cyclic Load function using the loading sequence function to represent the nonlinear behaviors of
structures subjected to cyclic loads Material & geometric nonlinear analysis functions to carried out detail analyses of steel structures consisted
of steel box, steel plate & I-beam sections
23 MIDAS
Modeling, Integrated Design & Analysis Software