gts 2d tutorial on metro station
TRANSCRIPT
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MIDAS IT Co., LtdMIDAS IT Co., LtdStep
midas GTS Tutorial
Construction Stage Analysis of Metro Station
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MIDAS IT Co., LtdMIDAS IT Co., LtdStep
Construction Stage Analysis of a Metro Station
Overview
In this tutorial the modeling
sequence for a 2D metro station has
been given.
The figure on the right shows the
cross section of the metro station.
The ground has 9 different layers of
soil
Four different stages of excavation
have been id entified.
L1- Ground to Roof Slab
L2- Roof Slab to Ticket Slab
L3 Ticket Slab to In termediate Sl ab
L4 Intermediate Slab to Raft Slab
The columns, barrets, slabs and D
wall have been mod eled as
structural elements (beam elements).
On the next p age a zoom ed in view
of the D wall and columns can be
seen.
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Construction Stage Analysis of Metro Station
1
Man Made Fill (1)
Upper Sand (2)
Upper Clay (3)
Middle Sand (4)
Low er Sand (5)
Upper Clay (6) Low er Sand (7)
Low er Clay (8)
Low er Sand (9)
L1
L2
L3
L4
If you want to start this tutorial except definition of attributes and generation of all geometries, I
recommend that you need to see this tutorial fro m Step 6(page 35).
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Construction Stage Analysis of a Metro Station
Overview
The closer look of the cross section
is shown here during the
construction phase.
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Construction Stage Analysis of a Metro Station
2
+32.69
4.92 6.48 6.48 4.92 15.97
27.37
11.39 11.40
+33.29
+42.89
+47.54
+54.34
+24.19
+52.34+52.59
EB +30.0
0.80
+26.85
20 kN/m2 20 kN/m2
20 kN/m2
2,5 kN/m2
2,5 kN/m2
0.80 0.80
0
.90
0.
70
0.
70
0.
80
S
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Construction Stage Analysis of a Metro Station
01
Material Properties
Soil Material Properties
3
ID 1 2 3 4 5 6 7 8
NameMan
Made FillUpperSand
MiddleSand
LowerSand
UpperClay UD
LowerClay UD
UpperClay D
LowerClay D
Type Ground Ground Ground Ground Ground Ground Ground Ground
(E) [MPa] 5 40 100 140 60 80 54 72
Poissons Ratio () 0.3 0.25 0.25 0.25 0.45 0.45 0.35 0.35
Unit Weight [kN/m3
] 16.677 18.639 19.62 20.601 18.639 18.1485 18.639 18.1485
Unit Weight(Saturated) [kN/m3]
16.677 18.639 19.62 20.601 18.639 18.1485 18.639 18.1485
Cohesion (c) [kPa] 0 0 0 0 160 170 2 0
Friction Angle () 27 35 38 39 0 0 28 30
K0 0.52 0.43 0.38 0.36 0.56 0.62 0.56 0.62
Material Model MC MC MC MC MC MC MC MC
Drainage ParameterUndrain
edUndrain
edUndrain
edUndrain
edUndrain
edUndrain
edDrained Drained
*MC- Mohr Coulomb
St
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Construction Stage Analysis of a Metro Station
01
Material Properties
Structural Element Material Properties
4
ID 9 10 11 12 13
MaterialD Wall
Concrete
D Wall
Concrete(service)
Structural
Steel
Structural
Concrete
Structural
Concrete(Service)
Type Structural Structural Structural Structural Structural
(E) [MPa] 19,905 9,953 200,000 23,281 11,641
Poissons Ratio () 0.2 0.2 0.3 0.2 0.2
Unit Weight
(Gamma) [kN/m3]25 25 77 25 25
Material Model Elastic Elastic Elastic Elastic Elastic
Note: 1. D Wall conc rete is used in D Wall and B arrets2. Structural Concrete is used in Slabs and Columns
GTS provides two types of materials, Ground and Structural. Ground is used to define material characteristics for those elements which are used to represent soil/ground (like plane strain in 2D and so lid elements in 3D).Structural material is used to define the material characteristics of struc tural elements like beam/truss/plate etc,
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Construction Stage Analysis of a Metro Station
02
Properties
Property
5
Columns
Barrets
Property is used to d efine the geometrical details o f structural elements. For line elemen
ts cross section/spacing may be defined. For plane elements thickness may be defined
Since the column is a composite sectionwe directly enter the propert ies of the sec
tion as shown.
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Construction Stage Analysis of a Metro Station
02
Properties
Property
6
Roof Slab
Ticket/Intermediate Slab
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Construction Stage Analysis of a Metro Station
02
Properties
Property
7
Raft Slab
D Wall
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Construction Stage Analysis of a Metro Station
Procedure
1. Main Menu > File> New
2. In the Project Setting define the
details as shown.
3. Cl ick [OK].
03
File > Open
8
2
2
Step
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Construction Stage Analysis of a Metro Station
Procedure1. Main Menu > Model >
Property > Attr ibute
2. Click on [Add] >Select [Plane].
3. ID 1, Name Man Made Fill.
4. Element Type > [Plane Strain].
5. Material > Click [Add].
6. ID 1, Name Man Made Fill,
Model Type [Mohr Coulomb].
7. Enter the properties as shown.
8. Click [OK] in Add/Modify
Ground Material.
9. Click [Apply] in Add/ Modify
Plane Attribute.
10. Similarly create the Att ributes
for Upper Sand, Middle Sand,
Lower Sand, Upper Clay UD
and Lower Clay UD using the
material properties defined in
the table before.
04
Model > Property > Attribute
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2
3
4
5
6
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Construction Stage Analysis of a Metro Station
Procedure
1. ID 7, Name Upper Clay D.
2. Element Type > [Plane Strain].
3. Material > Click [Add].
4. ID 7, Name Upper Clay D,
Model Type [Mohr Coulomb].
5. Enter the properties as shown
in the table before.
6. Make sure that the DrainageParameter is changed to
Drained
7. Click [OK] in Add/Modify
Ground Material.
8. Click [Apply] in Add/ Modify
Plane Attribute.
9. Similarly create the Attributes
for Low er Clay D using the
material properties given in
table before.
04
Model > Property > Attribute
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Construction Stage Analysis of a Metro Station
Procedure
1. The table on the right shows all
the Attributes created for
different soils.
2. Upper Clay Drained and Lower
Clay Drained have been defined
separately because their
properties are diff erent during
drained and undrained behavior.
3. So the Drained behavior of Claywil l be simulated later on as a
boundary condition during the
modeling process.
4. In the next step we create the
At tr ibutes for the Structural
Elements.
04
Model > Property > Attribute
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Construction Stage Analysis of a Metro Station
Procedure
1. Main Menu > Model > Property >
At tr ibute
2. Click [Add] > Select [Line].
3. ID 9, Name D Wall
4. Element Type > [Beam].
5. Material > Click [Add].
6. Enter the material properties for
D Wall Concrete and click [OK].
7. Property > Click [Add].
8. ID 1, Name `D Wall.
9. Type > [Beam/Nonlinear Beam],
Click [Sectional Library].
10. Enter the properties as shown.
11. Click[OK] in Sectional Library ,
Click [OK] in Add/Modify
Property Box.
12. Click [Apply] in Add/Modify Line
Attr ibute.
04
Model > Property > Attribute
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2
3
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Construction Stage Analysis of a Metro Station
Procedure
1. Attribute ID 10, Name D Wall
Service
2. Element Type > [Beam].
3. Material > Click [Add].
4. Enter the material properties for
D Wall Conc. Service as shown
and click [OK] in Add/Modify
Structural Material box.
5. Property > Select D Wall.
6. Click [Apply] in Add/Modify Line
At tr ibute.
04
Model > Property > Attribute
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Construction Stage Analysis of a Metro Station
Procedure
1. ID 11, Name Barret
2. Element Type > [Beam].
3. Material > Select D WallConcrete.
4. Property > Click [Add].
5. ID 2, Name Barret.
6. Type > [Beam]
7. Click [Sectional Library].
8. Enter the properties as shown.
9. Click[OK] in Sectional Library,
Click [OK] in Property Dialogue
Box.
10. Click [Apply] in Add/Modify Line
At tr ibute.
04
Model > Property > Attribute
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Construction Stage Analysis of a Metro Station
Procedure
1. ID 12, Name Barret Service
2. Element Type > [Beam].
3. Material > Select D Wall Conc.Service.
4. Property > Select Barret.
5. Click [Apply] in Add/Modify Line
At tr ibute.
04
Model > Property > Attribute
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Construction Stage Analysis of a Metro Station
Procedure
04
Model > Property > Attribute
16
Since the column is a composite section asshow n the properties o f the composite s
ection have been calculated and thenentered
1. ID 13, Name Column
2. Element Type > [Beam].
3. Material > Click [Add].
4. Enter the material properties for
Structural Steel as shown and
click [OK] in Add/Modify
Structural Material box.
5. Property > Click [Add].
6. ID 3, Name Column.
7. Type > [Beam/Nonlinear Beam]
8. Enter the properties as shown.
9. Click [OK] in Add/Modify
Property Dialogue Box.
10. Click [Apply] in Add/Modify Line
At tr ibute.
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Construction Stage Analysis of a Metro Station
Procedure
04
Model > Property > Attribute
17
1. ID 14, Name Roof Slab
2. Element Type > [Beam].
3. Material > Click [Add].
4. Enter the material properties for
Structural Concrete as shown
and click [OK] in Add/Modify
Structural Material box.
5. Property > Click [Add].
6. ID 4, Name `Roof Slab.
7. Type > [Beam]
8. Click [Sectional Library]
9. Enter the properties as shown.
10. Click [OK] in Add/Modify
Property Dialogue Box.
11. Click [Apply] in Add/Modify Line
At tr ibute.
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Construction Stage Analysis of a Metro Station
Procedure
04
Model > Property > Attribute
1. ID 15,
Name Roof Slab Service
2. Element Type > [Beam].
3. Material > Click [Add].
4. Enter the material properties for
ID-13, Name Structural Conc.
Service as show n.
5. Click [OK] in Add/Modify
Structural Material box.
6. Property > Select Roof Slab.
7. Click [Apply] in Add/Modify Line
At tr ibute.
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2
3
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5
6
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Construction Stage Analysis of a Metro Station
Procedure
04
Model > Property > Attribute
1. ID 16, Name Ticket/Inmdt Slab
2. Element Type > [Beam].
3. Material > Select
12 : Structural Concrete
4. Property > Click [Add].
5. ID 5, Name `Ticket/Inmdt Slab.
6. Type > [Beam/Nonlinear Beam]
7. Click [Sectional Library]
8. Enter the properties as shown.
9. Click [OK] in Add/Modify
Property Dialogue Box.
10. Click [Apply] in Add/Modify Line
Attr ibute.
Note : Since the Ticket and
Intermediate Slab have the same
thickness and same material so
the Attribute for them is also
same.
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Construction Stage Analysis of a Metro Station
Procedure
04
Model > Property > Attribute
1. ID 17, Name Ticket/Inmdt Slab
Service
2. Element Type > [Beam].
3. Material > Select
13 : Structural Conc. Service
4. Property > Select
5 : Ticket/Inmdt Slab
5. Click [Apply] in Add/Modify Line
Attr ibute.
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Construction Stage Analysis of a Metro Station
Procedure
04
Model > Property > Attribute
1. ID 18, Name Raft Slab
2. Element Type > [Beam].
3. Material > Select
12 : Structural Concrete
4. Property > Click [Add].
5. ID 6, Name `Raft Slab.
6. Type > [Beam]
7. Click [Sectional Library]
8. Enter the properties as shown.
9. Click [OK] in Add/Modify
Property Dialogue Box.
10. Click [Apply] in Add/Modify Line
At tr ibute.
11. Create the Att ribute for Raft
Slab Service by selecting
material 13:Structural Concrete
and Property 6:Raft .
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Construction Stage Analysis of a Metro Station
Procedure
04
Model > Property > Attribute
1. All the Attributes that have been
created are shown here.
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Construction Stage Analysis of a Metro Station
Procedure
05
Geometry > Curve> Create on WP > Rectangle W ire)
23
1. Main Menu > Geometry > Curve >
Create on WP > Rectangle(Wire)
2. Make sure that the Method is setto ABS x, y
3. Enter coordinates -100,-100 and
click [Apply].
4. The Method now changes to REL
dx, dy .
5. Enter the coordinates of the
diagonally opposite corner as 200,100 .
6. On the execution of this command
we get a wi re whose dimensions
are X=200 m and Y=100 m as
shown in the f igure.
7. Click [Cancel] to close the
Rectangle dialogue box.
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G C C WP
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Construction Stage Analysis of a Metro Station
Procedure
05
Geometry > Curve> Create on WP > L ine
24
1. Main Menu > Geometry >
Curve > Create on WP > Line
2. Make sure that the Method is setto ABS x, y . Enter coordinates
-11.4, 0 and click [Apply].
3. The Method now changes to
REL dx, dy. Enter the
coordinates of t he end point as
0,-27.49 .
4. Similarly repeat the above
procedure with the initial
coordinates as 11.4 ,0 and the
(next) relative coordinates as
0, -27.49 .
5. Create two more lines whose
respective ABS & REL
coordinates are given below
6. 1st line (-6.48,-1.75) (0,-28.4)
7. 2ndline (6.48,-1.75) (0,-28.4)
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2 3
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G t C C t WP
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Construction Stage Analysis of a Metro Station
Procedure
05
Geometry > Curve> Create on WP > L ine
25
1. In the previous steps the
geometry of D Wall and Columns
was created. In this s tep the
geometry of the Slabs wi ll be
created.
2. 1stline (-11.4,-1.75) (22.8,0)
3. 2ndline (-11.4,-6.8) (22.8,0)
4. 3rdline (-11.4,-11.45) (22.8,0)
5. 4thline (-11.4,-21.05) (22.8,0)
Note : The first set of
coordinates are ABS (x, y) and
the next are REL (dx, dy) as can
be seen in the figure.
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Geometry > Curve>
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Construction Stage Analysis of a Metro Station
Procedure
1. Main Menu > Geometry >
Curve > Intersect
2. Select all the curves that have
been created till this step by
using (Ctrl+A) or drag the
mouse around the created
edges to select all.
3. The selected edges will be
displayed by pink color
4. Click [Apply].
5. To ensure proper nodal
connectivity it is necessary to
intersect those edges which are
in contact (like Wall and slab
are in contact so the edges
representing them need to be
intersected)
06
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Geometry > Curve> Intersect
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Geometry > New Geometry Set >
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Construction Stage Analysis of a Metro Station
Procedure
1. The edges now intersected will
be split up into smaller edges.
2. So in order to organize theedges, Geometry Set will be
used.
3. Geometry > Geometry Set >
Context Menu > New Geometry
Set
4. Rename the new Geometry set
to Slabs by using F2 . Right
click on this Geometry set and
select Incl./Excl. Items.
5. Select the 12 edges as
highlighted and click [OK].
6. Now when the Geometry Set
Slabs is selected, the
highlighted edges w ill be
selected.
7. Hide Slabs Geometry Set by
checking it off as shown.
07
27
Geometry > New Geometry Set > Incl ./Excl. I tems
Check-off to hide Slabs
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Geometry > Curve> Create on WP >
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Construction Stage Analysis of a Metro Station
Procedure
08
Geometry > Curve> Create on WP > L ine
28
1. Geometry > Curve > Create on
WP > Line
2. To create the edges representingthe different soil profiles, lines
will be created with co-ordinates
mentioned.
3. 1stline (-100,-3) (200,0)
4. 2ndline (-100,-9.05) (200,0)
5. 3rdline (-100,-11.55) (200,0)
6. 4thline (-100,-16.55) (200,0)
7. 5thline (-100,-20.55) (200,0)
8. 6thline (-100,-22.05) (200,0)
9. 7thline (-100,-30.55) (200,0)
10. 8thline (-100,-36.0) (200,0)
11. When all the edges are created
they are shown in the figure.
12. The distance at any time can be
checked by pressing F3 and
invoking the Measure
command.
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Geometry > Curve>
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Construction Stage Analysis of a Metro Station
Procedure
1. Main Menu > Geometry >
Curve > Intersect
2. Select all the curves by using
(Ctrl+A) and click [Apply].
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Geometry > Curve> Intersect
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Geometry > New Geometry Set > Incl/Excl I tems
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Construction Stage Analysis of a Metro Station
Procedure
1. Geometry > Geometry Set >
Context Menu > New Geometry
Set
2. Rename the new Geometry set
to Soils by using F2 . Right
click on this Geometry set and
select Incl./Excl. Items.
3. Select the 32 edges as
highlighted and click [OK].
4. Hide Soils Geometry Set by
checking it off as shown.
10
3
y y
Check-off to hide Soil s1
2
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Geometry > New Geometry Set > Incl/Excl I tems
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Construction Stage Analysis of a Metro Station
Procedure
1. Similarly create two new
Geometry Sets and rename
them to D Wall and
Columns.
2. Include the edges as shown in
the D Wall Geometry Set.
3. Include the edges as shown in
the Columns Geometry Set.
4. Hide the Columns Geometry
Set and show only D Wall
Geometry Set.
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y y
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Geometry > Transform> Translate
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Construction Stage Analysis of a Metro Station
Procedure
1. Show only the D Wall
Geometry Set and hide the rest
as shown.
2. Main Menu > Geometry >
Transform > Translate.
3. Select the highlighted edge.
4. Direction > Select Global-X
5. Enter the details as shown and
click [Apply].
6. Similarly repeat the procedure
for the other edge as shown in
the figure below
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y
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Geometry > Curve> Intersect
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Construction Stage Analysis of a Metro Station
Procedure
1. Hide the D Wall Geometry Set.
2. Main Menu > Geometry >
Curve > Intersect
3. Select all the curves by using
(Ctrl+A) and click [Apply].
4. Select the two edges as shown
5. Invoke the context menu and
select Delete to delete these
edges.
6. When the Delete dialogue box
appears, click [OK].
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3
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Geometry > Curve> Create on WP > L ine
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Construction Stage Analysis of a Metro Station
Procedure
13
y
34
1. Two more lines will be created
which would define the location
of building loads
2. Main Menu > Geometry >
Curve > Create on WP > Line
3. 1st line (-27.37,-2) (-10,0)
4. 2nd line (27.37,-2) (10,0).
5. The geometry now is complete
and the next step is creating the
mesh sets.
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Mesh > Size Control> Along Edge
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Construction Stage Analysis of a Metro Station
Procedure
1. Show all the Geometry Sets.
2. Main Menu > Mesh > Size
Control > Along Edge
3. Select the edges as shown.
4. Seeding Method > Select
Interval Length , Interval
Length > Enter 1 .
5. Click [Preview ] ] to see the
seeding. Click [Apply].
6. Change the Seeding Method to
Linear Grading (Length) .
7. Select the edge and reversed
edge as shown.
8. Enter Slen as 5 and Elen
as 1.
9. Click [Preview ] to see the
seeding. Click [Apply].
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Mesh > Size Control> Along Edge
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Construction Stage Analysis of a Metro Station
Procedure
1. Select the 6 edges on the left of
D Wall and 6 reversed edge to
the right of D Wall as shown.
2. Enter Slen as 5 and Elen
as 1.
3. Click [Preview ] to see the
seeding. Click [Apply].
4. Select the 2 edges as shown.
5. Let the Seeding Method and
other parameters be same.
6. Check on Symmetric Seeding
7. Click [Preview ] to see the
seeding. Click [OK].
14
36
1
2
3 3
4
5
6
7
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
Mesh > Display > Mesh Seed
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Construction Stage Analysis of a Metro Station
Procedure
1. To see the seeds that have
been assigned to all the edges,
select all the edges, right c lick
to invoke the Context Menu and
select Display Mesh Seed
2. When the Display Mesh Seed
dialogue box appears select
Show Mesh Seed and click
[OK].
3. To hide the seeds, select all the
edges, right click to invoke the
Context Menu and select
Display Mesh Seed
4. Select Hide Mesh Seed in the
Display Mesh Seed dialogue
box and click [OK].
14
37
1
2
2
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
15
Mesh > Auto-Mesh > Planar Area
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Construction Stage Analysis of a Metro Station
Procedure
1. Main Menu > Auto-Mesh >
Planar Area...
2. Select the 23 edges as shownwhich define the first layer of
soil.
3. Enter Element Size 5 .
4. Select Attribute 1 : Man Made
Fill.
5. Click on Advanced Option .
6. Select Element type as
Triangle
7. Check-off Register Each Area
Independently and click [OK] .
8. Click [Apply] in Auto-Mesh
Planar Area dialogue box.
Note : If anytime the meshing step
is undone the features in
Advanced Option are again
set to default values.
38
1
2
3
4
5
6
7
7
8
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
15
Mesh > Auto-Mesh > Planar Area
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Construction Stage Analysis of a Metro Station
Procedure
1. Check-off the Man Made Fill
Mesh set previously created so
that the selected edges can be
seen clearly.
2. Select the edges as shown for
the second layer.
3. Select Attribute 2 : Upper Sand
and enter Name Upper Sand 2
4. Click [Advanced Option] to check
if the opt ions selected are still
updated.
5. Click [Preview] to see the seeds.
Click [Apply] to create the mesh
set.
Note : The edges which have Green
seeds imply those edges have
been previously used for
meshing and when the seeds are
Red the edges have not been
used for meshing.
39
2
1
3
4
5 5
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
15
Mesh > Auto-Mesh > Planar Area
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Construction Stage Analysis of a Metro Station
Procedure
1. Check-off the Upper Sand 2
Mesh set previously created.
2. Select the 23 edges as shown forthe third layer.
3. Select Attribute 5 : Upper Clay
UD and enter Name Upper Clay
3
4. Click [Preview] to see the seeds.
Click [Apply] to create the mesh
set.
5. Check-off the Upper Clay 3
Mesh set.
6. Select the edges for the 4thlayer
as shown.
7. Select Attribute 3 : Middle Sand
and enter Name Middle Sand 4
8. Click [Preview] to see the seeds.
Click [Apply] to create the mesh
set.
4
2
3
4 4
6
7
8
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
15
Mesh > Auto-Mesh > Planar Area
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Construction Stage Analysis of a Metro Station
Procedure
1. Check-off the Middle Sand 4
Mesh set previously created.
2. Select the edges as shown forthe 5thlayer.
3. Select Attribute 4 : Lower Sand
and enter Name Lower Sand 5
4. Click [Preview] to see the seeds.
Click [Apply] to create the mesh
set.
5. Check-off the Lower Sand 5
Mesh set.
6. Select the edges for the 6thlayer
as shown.
7. Select Attribute 5 : Upper Clay
UD and enter Name Upper Clay
6
8. Click [Preview] to see the seeds.
Click [Apply] to create the mesh
set.
41
2
3
4 4
6
7
8
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
15
Mesh > Auto-Mesh > Planar Area
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Construction Stage Analysis of a Metro Station
Procedure
1. Check-off the Upper Clay 6
Mesh set previously created.
2. Select the edges as shown forthe 7thlayer.
3. Select Attribute 4 : Lower Sand
and enter Name Lower Sand 7
4. Click [Preview] to see the seeds.
Click [Apply] to create the mesh
set.
5. Check-off the Lower Sand 7
Mesh set.
6. Select the edges for the 8thlayer
as shown.
7. Select Attribute 6 : Lower Clay
UD and enter Name Lower Clay
8
8. Click [Preview] to see the seeds.
Click [Apply] to create the mesh
set.
42
2
3
4 4
6
7
8
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
15
Mesh > Auto-Mesh > Planar Area
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Construction Stage Analysis of a Metro Station
Procedure
1. Check-off the Lower Clay 8
Mesh set previously created.
2. Select the edges as shown forthe 9thlayer.
3. Select Attribute 4 : Lower Sand
and enter Name Lower Sand 9
4. Click [Preview] to see the seeds.
Click [OK] to create the mesh set
and close the dialogue box.
5. Check-on all the Mesh sets.
6. The mesh sets are shown in the
figure below.
43
2
3
4 4
5
6
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
16
Model> Display Material/Property
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Construction Stage Analysis of a Metro Station
Procedure
1. To check that the mesh sets have
been assigned the Attributes
correctly, show all the mesh sets
2. Main Menu > Model > Display
Material/Property .
3. The Attributes that have been
assigned to the mesh set can
now be cross-checked by the
color code and conf irmed.
4. In the next step, the mesh sets
would be divided into mesh sets
based on stages of
construction/excavation.
44
2
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
17
Mesh> Mesh Set > New M esh Set
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Construction Stage Analysis of a Metro Station
Procedure
1. In the Works-Tree go to Mesh >
Mesh Set > Context Menu > New
Mesh Set.
2. Rename this New Mesh Set to
L1 by clicking F2 on it.
3. Right click on L1 mesh set >
Context Menu > Mesh Set >
Incl./Excl. Items.
4. Select the 94 elements to be
included in the L1 mesh set.
5. Cl ick [OK].
6. Hide the L1 mesh set.
45
1 2
3
4
5
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
17
Mesh> Mesh Set > New M esh Set
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Construction Stage Analysis of a Metro Station
Procedure
1. Similarly create a New Mesh Set
and rename it to L2 by clicking
F2 on it.
2. Right click on L2 mesh set >
Context Menu > Mesh Set >
Incl./Excl. Items.
3. Select the highlighted elements
to be included in the L2 mesh
set.
4. Cl ick [OK].
5. Hide the mesh set L2
6. Create two more New Mesh Set .
7. Rename them to L3 and L4
respectively.
1
1
2
3
4
46
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
17
Mesh> Mesh Set > New M esh Set
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Construction Stage Analysis of a Metro Station
Procedure
1. Right click on L3 mesh set >
Context Menu > Mesh Set >
Incl./Excl. Items.
2. Select the highlighted elements
to be included in the L3 mesh
set.
3. Click [OK] and hide this mesh set.
4. Right click on L4 mesh set >
Context Menu > Mesh Set >
Incl./Excl. Items.
5. Select the highlighted elements
to be included in the L4 mesh
set.
6. Cl ick [OK].
47
2
1
3
4
5
6
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
18
Model> Element > Ex tract Element
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Construction Stage Analysis of a Metro Station
Procedure
1. Model Works Tree > Mesh > Mesh
Set > Context Menu > Hide All.
2. Geometry > Curve > Context
Menu > Show All.
3. Check-on/Show all the
Geometry Sets except the Soil
Geometry Set.
4. Main Menu > Model >Element >
Extract Element
5. From Shape > Edge.
6. Select Edge(s) > Select the D
Wall Geometry Set.
7. Attribute 9 : D Wall .
8. Name D Wall .
9. Click [Apply].
10. Hide the D Wall Geometry Set.
48
4
1
2
3
5
6
7
8
9
MIDAS IT Co., LtdMIDAS IT Co., LtdStep
18
Model> Element > Ex tract Element
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Construction Stage Analysis of a Metro Station
Procedure
1. Select Edge(s) > Select the edges
as shown for the Roof Slab .
2. Attribute 14 : Roof Slab .
3. Name Roof Slab . Click [Apply].
4. Select Edge(s) > Select the edges
as shown for the Ticket Slab .
5. Attribute 16 : Ticket/Inmdt Slab .
6. Name Ticket Slab . Click [Apply].
7. Select the edges as shown for the
Intermediate Slab .
8. Attribute 16 : Ticket/Inmdt Slab .
9. Name Intermediate Slab . Click
[Apply].
10. Select Edge(s) > Select the edges
as shown for the Raft Slab .
11. Attribute 18 : Raft Slab .
12. Name Raft Slab . Click [Apply].
49
1
2 3
3
4
5 6
6
7
8 9
9
10
11 12
12
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
18
Model> Element > Ex tract Element
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Construction Stage Analysis of a Metro Station
Procedure
1. Select Edge(s) > Select the edges
as shown for the L2 Columns .
2. Attribute 13 : Column.
3. Name L2 Columns .Click [Apply].
4. Select Edge(s) > Select the edges
as shown for the L3 Columns .
5. Attribute 13 : Column.
6. Name L3 Columns .Click [Apply].
7. Select Edge(s) > Select the edges
as shown for the L4 Columns .
8. Attribute 13 : Column.
9. Name L4 Columns. Click
[Apply].
10. Select Edge(s) > Select the edges
as shown for the Barrets .
11. Attribute 11 : Barret .
12. Name Barret .
13. Click [OK].
5
1
2 3
3
4
5 6
6
7
8 9
9
10
11 12
13
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
19
Model> Element > Align Csys
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Construction Stage Analysis of a Metro Station
Procedure
1. Show D Wall, L2 Columns, L3
Columns, L4 Columns and
Barret mesh sets only.
2. Select the above mentioned mesh
sets. Context Menu > Display >
Click Element Csys .
3. The coordinate system of the 1D
elements are not aligned in the
same direction.
4. To align the elements go to
Model > Element > Change
Parameter
5. Select base element as the element
whose Z-axis (blue) is aligned in
same direction as Global X-axis
(red).
6. Select all the displayed elements as
elements to be aligned & [Apply].
7. Hide Element Csys by following
Step 2.
51
1
2
3
4
5
5
5
6
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
19
Model> Element > Align Csys
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Construction Stage Analysis of a Metro Station
Procedure
1. Show Roof Slab , Ticket Slab ,
Intermediate Slab and Raft
Slab mesh sets only.
2. Select the above mentioned mesh
sets. Context Menu > Display >
Click Element Csys .
3. Select base element as the
element whose X-axis (red) is
aligned in same direction as
Global X-axis (red).
4. Select all the displayed elements
of the slab mesh sets as elements
to be aligned & click [OK].
5. Hide Element Csys by following
Step 2.
52
4
1
2
3
4
4
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
20
Model > Load > Self Weight and Line Beam Load 1
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Construction Stage Analysis of a Metro Station
Procedure
1. Main Menu >Model > Load >
Self Weight
2. Load Set >Self Weight.
3. Self Weight Factor> Y : -1.
4. Cl ick [OK].
5. Model > Load > Line Beam
Load
6. Load Set Roof Slab Load .
7. Select the nodes at the two end
of the Roof Slab .
8. Direction> Global Y
9. Projection> No.
10. Enter the values of x1, x2, w1
and w2 as show n.
11. Click [Apply].
53
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3
4
5
6
7
7 7
8
10
9
11
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
21
Model > Load > Line Beam Load
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Construction Stage Analysis of a Metro Station
Procedure
1. Load Set Ticket Slab .
2. Select the nodes at the two end
of the Ticket Slab .
3. Direction> Global Y
4. Projection> No.
5. Enter the values of x1, x2, w1
and w2 as show n.
6. Click [Apply].
7. Load Set Ticket Slab Service .
8. Select the nodes at the two end
of the Ticket Slab .
9. Direction> Global Y
10. Projection> No.
11. Enter the values of x1, x2, w1and w2 as show n.
12. Click [Apply].
54
1
2
2
3 4 5
6
7
8
8
9 10 11
12
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
21
Model > Load > Line Beam Load
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Construction Stage Analysis of a Metro Station
Procedure
1. Load Set Intermediate Slab .
2. Select the nodes at the two end
of the Intermediate Slab .
3. Direction> Global Y
4. Projection> No.
5. Enter the values of x1, x2, w1
and w2 as show n.
6. Click [Apply].
7. Load Set Intermediate Slab
Service .
8. Select the nodes at the two end
of the Intermediate Slab .
9. Direction> Global Y
10. Projection> No.
11. Enter the values of x1, x2, w1
and w2 as show n.
12. Click [OK].
55
1
2
2
3 4 5
6
7
8
8
9 10 11
12
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
22
Model > Load > Pressure Load
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Construction Stage Analysis of a Metro Station
Procedure
1. Model Works Tree > Geometry >
Curve > Context Menu > Show All.
2. Main Menu > Model > Load >
Pressure Load
3. Load Set CS Traffic Load.
4. Object Type > [Curve] . Select the
2 edges as show n.
5. Enter the values as shown in the
dialogue box
6. Click [Preview] to see the loads
and click [Apply].
7. Load Set Service Traffic Load.
8. Object Type > [Curve] . Select the
3 edges as show n.
9. Enter the values as shown in thedialogue box
10. Click [Preview] to see the loads
and click [Apply].
56
2
3
4
4 4
5
6
7
8
8
9
10
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
22
Model > Load > Pressure Load
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Construction Stage Analysis of a Metro Station
Procedure
1. Load Set Building Load 1.
2. Object Type > [Curve] . Select the
edges as show n.
3. Enter the values as shown in the
dialogue box
4. Click [Preview] to see the load
and click [Apply].
5. Load Set Building Load 2.
6. Object Type > [Curve] . Select the
edge as shown.
7. Enter the values as shown in the
dialogue box
8. Click [Preview] to see the load
and click [Apply].
57
1
2
2
3
4
5
6
6
7
8
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
23
Model > Boundary > Ground Support
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Construction Stage Analysis of a Metro Station
Procedure
1. Analysis Works Tree > Load >
Context Menu > Hide All.
2. Model Works Tree > Mesh > Mesh
Set Context Menu > Show All.
3. Main Menu > Model > Boundary >
Ground Support
4. BC Set > Ground Support
5. Cl ick [OK].
58
3
12
4
4
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
24
Model > Boundary > Change Element Attribute
3 8
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Construction Stage Analysis of a Metro Station
Procedure
1. Main Menu > Model > Boundary >
Change Element A ttr ibute
2. BC Set > Upper Clay Drained .
3. Change the selection filter to Mesh
(M)
4. Select the Upper Clay 3 and Upper
Clay 6 mesh sets. From the Model
Works Tree.
5. Select Attribute 7:Upper Clay D
6. Click [Apply].
7. BC Set > Lower Clay Drained .
8. Change the selection filter to Mesh
(M)
9. Select the Lower Clay 8 mesh set.
From the Model Works Tree.
10. Select Attr ibute 8:Lower Clay D
11. Click [Apply].
59
2
4
1
5
6
7
9
10
11
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
24
Model > Boundary > Change Element Attribute
2 7
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Construction Stage Analysis of a Metro Station
Procedure
1. BC Set > D Wall Service .
2. Change the selection filter to Mesh
(M)
3. Select the D Wall mesh set from the
Model Works Tree.
4. Select Attribute 10:D Wall Service
5. Click [Apply].
6. BC Set > Barret Service .
7. Change the selection filter to Mesh
(M)
8. Select the Barret mesh set from the
Model Works Tree.
9. Select Attribute 12:Barret Service
10. Click [Apply].
6
1
3
4
5
6
10
8
9
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
24
Model > Boundary > Change Element Attribute
2 7
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Construction Stage Analysis of a Metro Station
Procedure
1. BC Set > Roof Slab Service .
2. Change the selection filter to Mesh
(M)
3. Select the Roof Slab mesh set from
the Model Works Tree.
4. Select Attribute 15:Roof Slab
Service
5. Click [Apply].
6. BC Set > Ticket Slab Service .
7. Change the selection filter to Mesh
(M)
8. Select the Ticket Slab mesh set
from the Model Works Tree.
9. Select A ttribute 17:Ticket/Inmdt
Slab Service
10. Click [Apply].
61
1
3
4
5
6
9
10
8
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
24
Model > Boundary > Change Element Attribute
2 7
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Construction Stage Analysis of a Metro Station
Procedure
1. BC Set > Inmdt Slab Service .
2. Change the selection filter to Mesh
(M)
3. Select the Intermediate Slab mesh
set from the Model Works Tree.
4. Select A ttribute 17:Ticket/Inmdt
Slab Service
5. Click [Apply].
6. BC Set > Raft Slab Service .
7. Change the selection filter to Mesh
(M)
8. Select the Raft Slab mesh set from
the Model Works Tree.
9. Select Attribute 19:Raft Slab
Service
10. Click [OK].
62
1
3
4
5
6
9
10
8
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
25
Model > Construction Stage >Define Construction Stage
11
2
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Construction Stage Analysis of a Metro Station 63
1. Main Menu > Model >
Construction Stage > Define
Construction Stage
2. Click [New], Stage Name Initial.
3. Drag & Drop from Set Data to
Act ivated Data the mesh sets,
load and boundary condition as
shown.
4. Define Water level as -24.34 .
5. Check-on [Clear Displacement].
6. Click [Save].
7. Click [New], Stage Name
Loading.
8. Activate the loads as shown.
9. Click [Save].
2
2
3
4
5
7
7
8
9
6
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
25
Model > Construction Stage>Define Construction Stage
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Construction Stage Analysis of a Metro Station 64
1. Click [New], Stage Name D Wall
+Columns.
2. Drag & Drop from Set Data to
Act ivated Data the mesh sets,
shown.
3. Check on Undrained .
4. Click [Save].
5. Click [New], Stage Name
Excavation to Roof (L1).
6. Drag & Drop from Set Data to
Deactivated Data the L1
mesh set.
7. Check on Undrained .
8. Click [Save].
1
2
4
3
45
5
6
8
7
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
25
Model > Construction Stage>Define Construction Stage
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Construction Stage Analysis of a Metro Station 65
1. Click [New], Stage Name Roof
Slab + L2 Excv.
2. Drag & Drop from Set Data to
Activated Data the Roof Slab
mesh set, Roof Slab Load load
and into Deactivated Data the
L2 mesh set.
3. Check on Undrained .
4. Click [Save].
5. Click [New], Stage Name Ticket
Slab + L3 Excv.
6. Drag & Drop from Set Data to
Activated Data the Ticket Slab
mesh set, Ticket Slab load and
into Deactivated Data the L3
mesh set.
7. Check on Undrained .
8. Click [Save].
1
2
4
3
65
5
6
8
7
2
6
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
25
Model > Construction Stage>Define Construction Stage
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Construction Stage Analysis of a Metro Station 66
1. Click [New], Stage Name Inmdt
Slab + L4 Excv.
2. Drag & Drop from Set Data to
Act ivated Data the
Intermediate Slab mesh set,
Intermediate Slab load and
into Deactivated Data the L4
mesh set.
3. Check on Undrained .
4. Click [Save].
5. Click [New], Stage Name Raft
Slab.
6. Drag & Drop from Set Data to
Activated Data the Raft Slab
mesh set.
7. Check on Undrained .
8. Click [Save].
1
2
4
3
65
5
6
8
7
2
6
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
25
Model > Construction Stage>Define Construction Stage
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Construction Stage Analysis of a Metro Station 67
1. Click [New], Stage Name EWL
Service.
2. Activate/Deactivate the mesh
sets/Boundary Condition and
loads as shown in the figure .
3. Check-on Define Water Level
for Global and enter a value of -
18.34 m.
4. Click [Save].
1
2
3
4
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
1 M i M A l i
26
Analysis > Analysis Case
1
2
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Construction Stage Analysis of a Metro Station
1. Main Menu > Analysis >
Analysis Case
2. Cl ick [Add]
3. Name >
CSA of Metro.
4. Analysis Type > Select
[Construction Stage].
5. Click on [Analysis Control] .
6. Analysis Control > Select
Construction Stage tab.
Check-on Initial Stage For
Stress Analysis and select
[Initial].
7. Check on [K0 Condition].
8. Non-linear tab. Load Steps >
Check-on A rc Length Method .
9. Click [OK] in Analysis Control.
10. Click [OK] in Analysis Case.
2
3
4
5
6
7
8
99
68
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
27
Analysis > Solve1
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Construction Stage Analysis of a Metro Station
1. Main Menu > Analysis > Solve
2. Check on CSA of Metro.
3. Cl ick [OK].
Al l the messages during the
analysis wil l be shown in the
Output Window. Especially, one
needs to be very cautious
about warn ing messages,
because these messages
indicate that the analysis
results may not be correct. The
model is automatically saved
before the analysis. The result
is saved as binary fi le(*.TA*) in
the same folder as the model.
The detail analysis information
is also saved in a text
file(*.OUT).
69
The Warning shown is not an error but a re
minder that the cross section has not been defined. This comes as Columns have been c
onsidered as composite sections.
2
3
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
28
Post Works Tree> Raft Slab -Step 001(1) > DY V ), Soil SYY
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Construction Stage Analysis of a Metro Station
1. Post Works Tree > Raft Slab -
Step 001(1)> Displacement >
DY(V). Shows the disp lacement
contour in Y direction (vertical
for t his problem).
2. Post Works Tree > Raft Slab -
Step 001(1)> 2D Element
Stresses > Soil SYY. Check the
effective vertical stresses in
soil as shown during the Raft
Slab stage.
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2
MIDAS IT Co., LtdMIDAS IT Co., Ltd
Step
Procedure
29
Post Works Tree> Excavation 3-Step 001(1) > 1D Element Forces >Beam My
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7/25/2019 GTS 2D Tutorial on Metro Station
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Construction Stage Analysis of a Metro Station 71
1. Post Works Tree > Raft Slab -
Step 001(1)> 1D Element
Forces > Beam My. Shows the
moment in element Y dir ection.
2. Tabbed Toolbar > Post Data
Tab > Click the arrow next to
the Output Set as shown.
3. As the user scrolls through this
with Sensitive checked-on
the results are updatedsimultaneously for each stage
and the results for each stage
can be checked by directly
scrolling to the stage.
Tabbed Toolbar
1
2
3