So sánh MIDAS Civil 6.7 vs RM2004

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Comparison of MIDAS/Civil V.670

and RM2004

MIDAS Information Technology

Contents

• MIDAS/Civil Analysis Features

• MIDAS/Civil vs RM2004

MIDAS/Civil Analysis Feature (1)

section properties

for each construction stage

methods

- FCM (Balanced Cantilever), ILM, FSM, MSS

MIDAS/Civil Analysis Feature (2)

(Member forces at the final stage converted into initial forces)

(P-delta analysis)

(large displacement analysis)

MIDAS/Civil Analysis Feature (3)

Construction Stage

Construction Stage

Unknown Load Factor

Unknown Load Factor

Check

Check

Apply unit Pretension loads

Construction Stage

Construction Stage

- Set constraints

- Calculate unknown load factors for each stage

- Modify unknown load factors by using influence matrix if necessary

Re-analyze construction stages reflecting unknown load factors

Verify analysis results for each stage

End

End

Construction Stage Analysis

• Calculation of initial cable forces of a cable stayed bridge

at the final stage/construction stages (Unknown Load Factors)

Definition of Unknown Load Factors

MIDAS/Civil Analysis Feature (4)

- Cable pretension forces controlled by the user

- In general analysis, applied cable forces are redistributed, becoming different from pretension loads.

- With the selection of ‘External Force’, cable forces become equal to pretension loads.

• Cable-Pretension Force Control

• Forward Stage Analysis incorporating Large

Displacement Analysis

• Forward Stage Analysis reflecting P-delta Effects

• Backward Stage Analysis for cable stayed

bridge/suspension bridge by substituting internal forces with member forces at the final stage (applicable when catenary elements are used)

MIDAS/Civil Analysis Feature (5)

cable forces

Initial Configuration Analysis for Suspension Bridge

(Earth-anchored/Self-anchored)

MIDAS/Civil Analysis Feature (6)

• 2nd Configuration Analysis (Refined Method)

- Applicable to SELF-ANCHORED suspension bridge

- Initial configuration analysis based on cable

coordinates/unstressed lengths/horizontal cable forces resulting from the 1st configuration analysis

MIDAS/Civil vs RM2004 (1)

-Basic module

MIDAS/Civil RM2004

-Versatile modeling features / Swift modeling

by Wizards - Modeling by using GP2004

-Can consider variations of structural system

and loading conditions in construction stages - Same as MIDAS

-Can calculate section properties of irregular

sections

-Can accurately calculate torsional constant

and shear stress

- Same as MIDAS

- Can define a reference position by top fiber,

bottom fiber, centroid, etc of a section

(easy-to-model a tapered section) - Same as MIDAS

-Moving load analysis by influence lines &

surfaces

-Moving loads as per each country code

(AASHTO, BS, CSA, Indian, Taiwan, etc.)

-Easy-to-find maximum load case by using

moving load tracer

- Moving load analysis by using influence

lines or advancing static moving loads by a specific spacing

- Moving loads as per each country code

- Not easy to find the maximum load case

MIDAS/Civil vs RM2004 (2)

-Prestressed Concrete module

MIDAS/Civil RM2004

-Provides various WIZARDs pertaining to

construction methods (FSM, MSS, ILM, FCM)

-Provides PRE-PROCESSOR pertaining to

ILM construction method

- Provides torsional constant of PSC section - Same as MIDAS

-Tendon placement in a 3D space (at any

locations of a section) - Same as MIDAS

- Considers the effects of creep & shrinkage - Same as MIDAS

- Analysis reflecting the effects of prestress

induced at each construction stage

- Analysis of redistribution of internal forces

reflecting creep and shrinkage (transverse bending)

- Same as MIDAS

-Simultaneous application of the above

along with geometric nonlinear analysis

MIDAS/Civil vs RM2004 (3)

-Composite module

MIDAS/Civil RM2004

- Analysis of composite section - Same as MIDAS

-Considers the effects of creep and shrinkage

due to staged construction and maturity even

within a cross-section

- Same as MIDAS

MIDAS/Civil vs RM2004 (4)

- Cable Stayed/Suspension Bridge module

MIDAS/Civil RM2004

-Consideration of CABLE SAG (equivalent truss,

catenary)

-Consideration of CABLE SAG (equivalent truss)

- Large displacement analysis for each

construction stage (forward/backward)

- P-DELTA analysis for each construction

stage (forward)

- Linearized finite displacement theory

- Backward only

- Same as MIDAS

- Same as MIDAS

- Produces pretension, at each construction

stage, satisfying constraint conditions at the

final stage in cable stayed bridge analysis

(Unknown Load Factors)

- Same as MIDAS (KASP/ADDCON)

creep & shrinkage and P-delta analysis simultaneously

- Initial configuration analysis of suspension

bridge for self-anchored or earth-anchored,

- Not available

MIDAS/Civil vs RM2004 (5)

-Dynamic/Nonlinear/Other modules

MIDAS/Civil RM2004

- Eigenvalue analysis/Response

spectrum/Time history analysis

- Same as MIDAS

- Not available -Dynamic Wind Analysis

- Seismic resistance with pushover analysis

- Inelastic Time History Analysis

- Not available

- Not available

- Provides vibration isolators such as LRB

and friction pendulum system isolator

- Tension-only and compression-only Spring

- Provides boundary nonlinear element for

specific vibration isolator

- Same as MIDAS -Nonlinear analysis reflecting concrete

cracking

- Same as MIDAS