▪ Properties
Overview
Cable-Stayed Bridge
▪
▪
Material Properties
Section Properties
Modeling & Analysis
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis
▪ Results
▪ Load Combination
▪ Reactions
▪ Deformation
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
Step
PLEASE CONNECT YOUR
LAPTOPS TO THE INTERNET.
MIDASIT
Overview
▪ Properties
▪ Material Properties
▪ Section Properties
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis
▪ Results
▪ Load Combination
▪
▪
Reactions
Deformation
Step 1. Modeling Statement
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
Step
4 Modeling Statement
Cable-stayed bridges are structur
al systems effectively composing
cables, main girders and towers
.
This bridge form has a beautiful
appearance and easily fits in with
the surrounding environment due
to the fact that various structural
systems can be created by changi
ng the tower shapes and cable ar
rangements.
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5 Modeling Statement
REQUIRED ANALYSIS:
• Static Analysis
• Dynamic Analysis
• Eigenvalue Analysis
• Moving Load Analysis
• Earthquake Load Analysis
• Wind Load Analysis
• Construction Stage Analysis
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6 Modeling Statement
Bridge type: Three span continuous cable-stayed bridge (self-anchored)
Bridge length: L = 100 m+220 m+100 m = 420 m
Bridge Width: B = 15.6 m (2 lanes)
Lanes: 2 lane structure
MIDASIT
Overview
▪ Properties
▪ Material Properties
▪ Section Properties
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis Step 1. Properties
▪ Results
▪ Load Combination
▪ Reactions
▪ Deformation
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
Step
8 Material Properties
Procedure
Create a new project file.
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9 Material Properties
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10 Material Properties
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11 Material Properties
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12 Material Properties
Standard: Select the standards of a country in the field.
None: The user defines the material properties directly. The user may modify the data obtained from the
DB standards.
ASTM(S): American Society for Testing Materials
CSA(S): Canadian Standards Association
BS(S): British Standard
BS04(S): British Standards / BS EN 10025 (2004)
DIN(S): Deutches Institut fur Normung e.v
EN(S): European Standard
UNI(S): Italian National Standard
GOST(S): Russian National Standard
JIS(S): Japanese Industrial Standards
JIS-Civil(S): Japanese Civil Standards
GB03(S): Chinese National Standard
GB(S): Chinese National Standard
JGJ(S): Chinese Industrial Standard
JTJ(S): Chinese National Standard of Highway Engineering
JTG04(S): Chinese Technical Standard of Highway Engineering. Wire and heat treated rebar materials can be selected from DB
TB05(RC): TB 10002.3-2005 (Code for design on reinforced and prestressed concrete structure of railway bridge and culvert)
KS(S): Korean Industrial Standard
KS-Civil(S): Korean Civil Standards
IS(S): Indian Standards
CNS(S): Chinese National Standard
BC1:12-ASTM/BS/JIS/GB(S): Building and Construction Authority of Singapore, Design Guide on Use of Alternative Structural Steel t
o BS 5950 and Eurocode 3, Class 1 structural steel
BC1:12-Class2(S): Building and Construction Authority of Singapore, Design Guide on Use of Alternative Structural Steel to BS 5950 a
nd Eurocode 3, Class 2 structural steel
BC1:12-Class2(S): Building and Construction Authority of Singapore, Design Guide on Use of Alternative Structural Steel to BS 5950 a
nd Eurocode 3, Class 3 structural steel
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13 Material Properties
None: The user defines the material properties directly. The user may modify the data obtained from the DB sta
ndards.
Standard Codes:
ASTM(RC): American Society for Testing Materials
CSA(RC): Canadian Standards Association
BS(RC): British Standard
Note
When material data are defined per BS or Chinese Standards, Cubic compressive strength is used as
opposed to Cylinder strength.
EN(RC): European Code
UNI(RC): Italian National Standard
GOST(RC): Russian National Standard
JIS(RC): Japanese Industrial Standards
GB(RC): Chinese National Standard
GB-Civil(RC): Chinese National Standard
JTG04(RC): Chinese Technical Standard of Highway Engineering
TB05(RC): TB 10002.3-2005 (Code for design on reinforced and prestressed concrete structure of railway b
ridge and culvert)
KS01(RC): Korea Industrial Standards (in SI unit system)
KS(RC): Korean Industrial Standards (in MKS unit system)
KS-Civil(RC): Korean Civil Standards
IS(RC): Indian Standards
CNS(RC): Chinese National Standard
JTG04(S) : Jiao Tongbu Gong Lu Biao Zhun (China)
UNI(RC): Italian National Standards
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14 Material Properties
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Overview
▪ Properties
▪ Material Properties
▪ Section Properties
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis Step 2.Modeling
▪ Results
▪ Load Combination
▪ Reactions
▪ Deformation
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
Step
17
There are a few ways to model your structure:
1. Nodes and Elements
2. Importing .dxf file
3. Bridge Wizards
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18
IN IMPORTING .DXF FILES
• Polyline in .dxf file will be imported as a beam element
• Surface in .dxf file will be imported as a plate element
• Solid can not be imported
• The length unit must be identical with the unit used in AutoCAD.
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19
IN USING BRIDGE WIZARDS:
• Material and Section Properties must be defined first.
• You may use predefined wizards for repetitive project specifications
• Here are the available bridge wizards:
• Base Structures
• Suspension Bridge
• Cable Stayed Bridge
• Incremental Launching Method Bridge
• Free Cantilever Method Bridge
• Movable Scaffolding System Bridge
• Full Staging Method Bridge
• Transverse Model
• Grillage Model
• RC Slab Bridge
• RC Frame/Box Culvert
• Steel Composite Bridge
• Prestressed Composite Bridge
• PSC Bridge
• Composite Bridge
• Steel Girder Bridge
• Rail Track Analysis Model
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Overview
▪ Properties
▪ Material Properties
▪ Section Properties
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis Step 3. Boundary Conditions
▪ Results
▪ Load Combination
▪ Reactions
▪ Deformation
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
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MIDASIT
Overview
▪ Properties
▪ Material Properties
▪ Section Properties
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis
▪ Results
▪ Load Combination
▪
▪
Reactions
Deformation
Step 4. Loads
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
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59 Elements Load Case Tension (kN Group
)
1 40 111 150 TENSION 1 1 Default
20 21 130 131 TENSION 2 1 Default
2 39 112 149 TENSION 3 1 Default
19 22 129 132 TENSION 4 1 Default
3 38 113 148 TENSION 5 1 Default
18 23 128 133 TENSION 6 1 Default
4 37 114 134 TENSION 7 1 Default
17 24 127 147 TENSION 8 1 Default
5 36 115 135 TENSION 9 1 Default
16 25 126 146 TENSION 10 1 Default
6 35 116 136 TENSION 11 1 Default
15 26 125 145 TENSION 12 1 Default
7 34 117 137 TENSION 13 1 Default
14 27 124 144 TENSION 14 1 Default
8 33 118 138 TENSION 15 1 Default
13 28 123 143 TENSION 16 1 Default
9 32 119 139 TENSION 17 1 Default
12 29 122 142 TENSION 18 1 Default
10 31 120 140 TENSION 19 1 Default
11 30 121 141 TENSION 20 1 Default
MIDASIT
Overview
▪ Properties
▪ Material Properties
▪ Section Properties
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis
▪ Results
▪ Load Combination
▪
▪
Reactions
Deformation
Step 6. Analysis
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
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Overview
▪ Properties
▪ Material Properties
▪ Section Properties
▪ Modeling
▪ Boundary Conditions
▪ Loads
▪ Analysis
▪ Results
▪ Load Combination
▪
▪
Reactions
Deformation
Step 7. Results
▪ Beam Diagram
▪ Moving Tracer
▪ Vibration Mode Shapes
▪ Dynamic Report
Step
63 Material Properties
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64 Results
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65 Appendix. Support & Results
Support Boundary
Example:
Rz Dx
Ry Dy
Rx Dz
Dy, Dz are fixed
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66 Appendix. Support & Results
Forces Fx Fy Fz
Axial Force y(minor axis) shear force z(major axis) shear force
Mx My Mz
y y z z
torsion y(major axis) bending z(minor axis) bending
moment moment
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67 Appendix. Support & Results
Stress y
czp
w (1)
A (0.8) czm
I (0.04267) cym cyp
L (10) Unit : kN, m
SFD Shear Stress
5
VQ/Ib (9.37) y
Q/b
BMD Bending Stress
12.5
y My/I (117.2)
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68 Appendix. Support & Results
Stress
σ axial
2 P Fx
1 Sax axial stress
A Area
4
3
Fy
Ssy minor axis · Qzb
Izz
σ shearshear stress
VQ
Ib
Fz
Ssz major axis · Qyb
Iyy
shear stress max(Cyp, Cym)
Mz
Sby minor axis · Cy
Izz
σ bending bending My
stress I
My
Sbz major axis · Cz
Iyy
bending
stress P My Fx Mz My
Combined + + · y + ·z
A I Area Izz Iyy
y1, y2, y3, y4
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Step
Thank you!
Engr. Jirah Realo
Technical Support Engineer and CAE Consultant
MIDAS IT PH
MIDASIT
