static analysis of 3d bridge with abaqus

1

Homework

Aplied Fem in Abaqus

Student: Erald Shuli (ID 108013239258)

T. Arriessa Sukhairi (ID 108013235855)

2

Static Analysis of 3D Bridge

Problem Description

The three-dimensional bridge structure are simply supported at its left and right side corners

and with two beams 5 m from each side of the bridge. The structure is composed of steel box-

sections and pipe-sections with (E = 210 GPa, = 0.3) oriented as shown below. A uniform

distributed load of 100 N/m is applied to the lower horizontal members in the vertical

downward direction.

Determine the stresses and the vertical displacements.

Analysis Step

1. Start Abaqus and Create new model database.

3

2. Creating Part:

a. Arc element

i. Click Parts

ii. Set Name arc.

iii. Select 3D Planar, deformable, wire.

iv. Set Approximate size = 100.

v. Select create arc.

vi. Enter the Point.

b. Truss Elements :

i. Click Parts

ii. Set Name Bridge

iii. Select 3D Planar, deformable, wire

iv. Set Approximate size = 100

v. Select create Lines

vi. Select linear Patterns

c. Connector 1 Elements :

i. Click Parts

ii. Set Name Connector 1


4



d. Connector 2 Elements :

i. Click Parts

ii. Set Name Connector 2




e. PipeBeam Elements :

i. Click Parts

ii. Set Name PipeBeam




3. Material

a. In this case we use the material S235

i. Name the material Steel

ii. Click Mechanical -> Elasticity -> Elastic

iii. Insert the properties 2.1e11 for Youngs Modulus and 0.3 for Poissons

Ratio.

5

4. Then, defining and assigning section properties for the bridge. In this case we define 4

cross section and 3 profiles.

a. To make the section we need to define the profiles of the sections:

i. First profile :

1. The Name of the profile is RectBeam.

2. Shape Box.

3. Continue

4. a = 0.08 ; b = 0.12 ; Uniform ; Thickness = 0.005.

5. OK

ii. Second profile :

1. The Name of the profile is PipeBeam1.

2. Shape pipe.

3. Continue

4. Thin walled ; radius = 0.12 ; Thickness = 0.005.

5. OK

iii. Third profile :

1. The Name of the profile is PipeBeam2.

2. Shape pipe.

3. Continue

4. Thin walled ; radius = 0.08 ; Thickness = 0.005.

6

5. OK

b. We create 4 Sections

i. First section:

1. Name the section TRUSS

2. Select Beam -> Truss

3. Continue

4. The material is Steel

5. Cross-sectional area = 0.0002

6. OK

ii. Second section:

1. Name the section RECBEAM.

2. Select Beam -> Beam

3. Continue

4. Select profile name RectBeam


6. OK

iii. Third section:

1. Name the section PIPEBEAM.


3. Continue

4. Select profile name PipeBeam1


6. OK

iv. Fourth section:

1. Name the section PIPEBEAM2.


3. Continue

4. Select profile name PipeBeam2


6. OK

c. The next, we do the Section Assignments for each part.

7

i. First Part (Truss).

1. Double click Section Assignments

2. Select set 1

a. Set 1 is upper element and the diagonal element.

b. Select TRUSS as Section

c. Click OK -> Done

3. Select set 2

a. Set 2 is the downline element.

b. Select RECBEAM as a Section.

c. Click Ok -> Done.

ii. Second Part (Arc).


2. Select set 3

a. Set 3 is all of the arc element.

b. Select PIPEBEAM as Section

c. Click OK -> Done

iii. Third Part (Connector 1).


2. Select set 4

a. Set 4 is Connector 1 element.

b. Select RECBEAM as Section

c. Click OK -> Done

iv. Fourth Part (Connector 2).


2. Select set 1

a. Set 1 is truss element.

b. Select TRUSS as Section

c. Click OK -> Done

v. Fifth Part (PipeBeam).


2. Select set 5

8

a. Set 5 is PipeBeam Element.

b. Select PIPEBEAM2 as Section

c. Click OK -> Done

d. Then we create Beam Section Orientation. From the toolbar, select Assign -

> Beam Section Orientation. We have 4 beam section:

i. First (arc)

1. the prompt area, select Sets 3

2. Check Highlight selections in viewport

3. Select arc

4. Type approximate n1 direction (0.0,0.0,-1.0).

5. Click Continue

6. Click OK -> Dismiss -> Done in the prompt area

ii. Second (Connector 1)



3. Select Connector 1

4. Type approximate n1 direction (-1.0,0.0,0.0).

5. Click Continue

6. Click Done in the prompt area

iii. Third (PipeBeam)



3. Select PipeBeam

4. Type approximate n1 direction (-1.0,0.0,0.0).

5. Click Continue


iv. Fourth (RectBeam)



3. Select RectBeam

4. Type approximate n1 direction (0.0,0.0,-1.0).

9

5. Click Continue


5. Assembly

a. Expand assembly

i. Select Instance

ii. Select the Parts (Arc, Truss, Connector 1, Connector 2,

PipeBeam)

iii. Click Ok

b. Create the other side of the Bridge:

i. select Instance Translate

ii. select Arc and Truss -> ok

iii. first coordinate 0,0,0 -> Enter

iv. second coordinate 0,0,2 -> Enter -> Ok

v. Select Instance

vi. Select the Parts (Arc, Truss)

vii. Click Ok.

c. Rotate the connector 1.

i. select Instance -> Rotate

ii. click Instances

iii. Select connector-1 -> OK

iv. Type 0, 0, 0 -> Enter

v. Type 0, 1, 0 -> Enter

vi. Type -90 -> Enter -> OK

d. Rotate the connector 2

i. select Instance -> Rotate

ii. click Instances


iv. Type 1, 0, 0 -> Enter

v. Type 1, 1, 0 -> Enter

vi. Type -90 -> Enter -> OK

vii. Translate the connector 2a

e. Translate the PipeBeam.

10

i. select Instance -> Translate

ii. click Instances

iii. Select PipeBeam -> OK

iv. first coordinate 5,0,0 -> Enter

v. second coordinate 5,1,-0.3 -> Enter -> Ok

f. Rotate the PipeBeam

i. Type 5, 0, -0.3 -> Enter

ii. Type 5, 1, -0.3 -> Enter

iii. Type -90 -> Enter -> OK

g. Copy the connector 1 to the entire bridge

i. Instance -> Linear Pattern

ii. In the prompt area, click Instances


iv. Set Number = 1 and Offset = 20 for Direction 1

v. Set Number = 1 for Direction 2

vi. Click OK

h. Copy the connector 2 to the entire bridge






vi. Click OK

i. Copy the PipeBeam to the entire bridge



iii. Select PipeBeam -> OK



vi. Click OK

j. Then make one element from all of the element that we make before by

selecting Instance -> Merge/Cut

11

i. The Name is Bridge3D -> Continue


iii. Select all instances -> OK -> Done

6. Analysis Step

a. In the model tree on the left, double click on Steps

i. Name the step Step-1

ii. Select General for Procedure type

iii. Static, General

iv. Click Continue -> OK

7. Apply Boundary conditions

a. We create two boundary conditions for the bridge 3D.

i. First BCs :

1. Name the boundary condition FixedA

2. Select Initial for Step

3. Select Mechanical for Category

4. Select Displacement/Rotation for Type of Selected Step

5. Click Continue

6. Select the end point of the arc

7. Click Done

8. Check U1, U2, U3,UR1, UR2, UR3

9. Click OK

ii. Second BCs :

1. Name the boundary condition FixedB

2. Select Initial for Step

3. Select Mechanical for Category

4. Select Displacement/Rotation for Type of Selected Step

5. Click Continue

6. Select the line in the right and the left side of the bridge 3D

7. Click Done

8. Check U1, U2, U3,UR1, UR2, UR3

9. Click OK

12

8. Apply Loads

a. In the model tree on the left, double click on Loads

i. Name of the boundary condition bridgeLoad.

ii. Select Step-1 for Step

iii. Select Mechanical for Category

iv. Select Line load for Type of Selected Step

v. Click Continue

vi. In the prompt area, select Sets 2

vii. Check Highlight selections in viewport

viii. Click Continue

ix. Set values -100 for Component 2

x. Click OK

9. Generate Mesh

a. In the model tree on the left, under Parts, Bridge3D, double click on

Mesh

i. Select Mesh -> Element Type.

In the prompt area,

1. select Sets 1

a. Select Truss

b. Click Continue

c. Select Standard for Element Library

d. Select Linear for Geometric Order

13

e. Select Truss for Family

f. Click OK -> Dismiss -> Done

2. select Sets 2

a. Select Beam

b. Click Continue



e. Select Beam for Family

f. Click OK

3. select Sets 3

a. Select Beam

b. Click Continue




f. Click OK

4. select Sets 4

a. Select Beam

b. Click Continue




f. Click OK

5. select Sets 5

a. Select Beam

b. Click Continue




f. Click OK

14

ii. Click Seed Edges icon

1. Select Set 1

a. Click Continue

b. Select By number for Method

c. Set Number of elements = 1

d. Click OK

2. Select Set 2

a. Click Continue



d. Click OK

3. Select Set 3

a. Click Continue



d. Click OK

4. Select Set 4

a. Click Continue



d. Click OK

5. Select Set 5

a. Click Continue



d. Click OK

iii. Click OK ->Dismiss -> Done

iv. Click Mesh Part Instance -> Yes

10. Creating and submitting an analysis Job

a. In the model tree on the left, double click on the Jobs

15

i. Name the job Bridge3D

ii. Click Continue

b. expand Jobs

i. Right click on Bridge3D

ii. Click Submit

11. Viewing results

a. Plotting deformation shape

i. After ABAQUS finishes calculation, right click on Bridge3D and

click Results

ii. Click Plot Deformed Shape

iii. Click Allow Multiple Plot States

iv. Click Plot Undeformed Shape

16

b. Viewing stresses

i. Click Allow Multiple Plot States again

ii. Click Plot Contours on Deformed Shape

iii. From main menu, select Result -> Field Output -> Stress

components at integration points

c. Viewing reaction forces

i. Select Reaction force at node

ii. To show components of reaction forces, select RF1 or RF2 ->

Click OK

static analysis of 3d bridge with abaqus

Documents

section truss

section pipebeam2

section properties

section assignments

cross section

section recbeam

beam beam

material steel