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Unlike conventional structures,
a specific analysis approach is required for Suspension
Bridges, which are composed of flexible cables. Suspension
Bridge Wizard in MIDAS/Civil automatically
calculates the cable coordinates and tensions of the completed
structure. Also, using 3D Elastic suspension line element
and Equivalent truss element can consider non-linear characteristics
of the cables. It supports Geometric
non-linear analysis as well as Construction
stage analysis.
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Analysis model of the completed
Kwangan Grand Br. using Suspension Bridge Wizard
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Analysis of Completed
Structure
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- Linear analysis using Initial
Force for Geometric Stiffness (Linearized
Finite Deformation Analysis)
- Moving Load analysis (Influence Line/Surface analysis)
- The program supports real time Display of Construction
Stages.
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Suspension Bridge
Wizard
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- All coordinates of a suspension bridge including
the main cables are automatically determined upon
entering the design conditions such as the sag, girder
weights, etc.
- Tension forces in the main and hanger cables at
the state of the completed structure are automatically
calculated.
- Geometric stiffness is automatically formulated
by transforming the calculated tensions in the main
cables and hangers into Initial
Force for Geometric Stiffness.
- Analyses for the completed structure as well as
the structures during construction stages are carried
out after determining the initial equilibrium state
by simply applying Suspension
Bridge Wizard.
- Initial equilibrium state analysis using Suspension
Bridge Wizard
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Completed bridge shape and tensions
in main cables/hangers determined by Suspension Bridge
Wizard
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Analysis Results of
Completed Structure
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Static/Dynamic analysis results produced
in Model Views, Tables, Graphs, etc.
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Mode Shapes resulting from eigenvalue
analysis of a suspension bridge
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Construction Stage
Analysis
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MIDAS/Civil supports Geometric non-linear analysis (Large
displacement analysis) and Construction
stage analysis.
Accordingly, the element forces and deformed shape of
a particular stage are reflected in the subsequent stage
for accurate analysis.
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Real time Display of the Inverse
analysis process of Kwangan Grand Br. for construction
stage analysis
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Definition of Construction
Stages
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- Specify members, boundary conditions and loadings
pertaining to each stage in the Construction Stage
Dialog box.
- Temporary loads applied to the structure at a particular
stage may be added or deleted.
- The program supports real time Display of Construction
Stages.
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Display of Inverse Construction
Stage Analysis models reflecting members, boundary conditions
and loadings pertaining to each stage in the Construction
Stage Dialog box
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Results of Construction
Stage Analysis
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- Displacements, Member forces and Stresses produced
for each construction stage
- Analysis results produced for structures at various
stages due to temporary loads and wind loads
- Dynamic analysis results produced for a specific
construction stage
- Magnitudes of setbacks and sags produced for staging
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Display of a deflected shape
and tension forces, which are also tabulated, subsequent
to carrying out inverse construction stage analysis
Result display and Table of wind
load analysis of Kwangan Grand Br.
at a specific construction stage |
