assoc. prof. dr. yavuz yardim

Assoc. Prof. Dr. Yavuz YARDIM


Then click OK three times to close windows

Now we define the Layout

Next step will defining deck section

�Go to bridge

�Deck section

�Add new deck section

�Choose steel and concrete deck section ( Steel girder)

Now we have default section

we need to change girder section which is FSEC1


We need to change girder section which is

FSEC1

Go to frame section ( previous slight )

Import new section

Select wide section

From the file we select “ AISC3.pro”

Select w36x230

Click ok

Select girder as w36x230

Change number of girder to the 4

Change total width to 36 ft.

Click ok ( check next slight)

Here section is up to us W 36x230 is given that

is why we select that

If it is not given we can select a range of

available section and program will find

optimum itself .


Now we define diaphragms

�Go to bridge

�Diaphragms

�Add new diaphragm

�Select chord and brace

It is steel girder that is why we have to

select this for bracing this give us more

sound bridge

Include top chord press “+ “

Import new Properties

Select wide section

From the file we select “ AISC3.pro”

Select w8x10

Click ok

Select girder as w8x10 for all ( check the figure

in this slight)

Click ok two times


Now we define Bearings

�Go to bridge

�Bearings

�Add new Bearings

�Select bearing as shown in fig


Now we define foundation

�Go to bridge

�Foundation spring

�Add new Foundation spring

�Set the windows as in fig.


Now we define Abutments

Before we define abutment we have to

define frame section for abutment

�Go to define

�Section –> frame section

�Add new property

�Select concrete � rectangular

section

� depth 4 width 2 ft

�Change the name as abutment 4x2

�Then click ok and ok

�Go to bridge

�abutment

�Add new Abutment

�Set name as Abutment


Abutments

�Set windows as in figure

�Click ok two times and reach main

window


Now we define bent

Before we define bent we have to define

frame section for bent

�Go to define

�Section –> frame section

�Add new property

�Select concrete � circular section

� Diameter 2 ft

�Change the name as Column 2

�Then click ok

�Add new property

�Select concrete � circular section

� Depth 4 width 2

�Change the name as BentCap4x2

�Then click ok and ok

�Go to bridge

�bent

�Add new Bents

�Set windows as in fig Assoc. Prof. Dr. Yavuz YARDIM

Press modify/show column data

�Set windows as in figure

�Click ok and ok and ok


Now we define Bridge Object

This option will combine all predefined

bridge member in to a bridge structure

�Go to Bridge

�Bridge object

�Add new bridge Object

�Select span �

�start abutment 1000ft

�Press modify

�Click span end abutment

� end span 1100

�Press modify

�Type 1050 to station and press add

to add intimidate span (span1 )

�Be sure windows is set like in fig

�DON’T Click ok


Bridge Object

�Select Abutment �

�Press modify and show

�Press modify see fig

�Select BDIA1 from diaphragm ( this is

the diaphragm we define before in

slight 11)

� we have to define elevation of

abutment from top of the deck from

substructure location elevation ( global

Z) is -4.2417

�From bearing Assignment

�Elevation at layout line (Global Z) is

3.7417 ( 5 in. less than elevation (

global Z) ) see fig 2

�select end Abutment

�Select BDIA1 for diaphragm

�we have to define elevation of

abutment from top of the deck from

substructure location elevation ( global

Z) is -4.2417


�Elevation at layout line (Global Z) is

3.7417 ( 5 in. less than elevation (

global Z) )

�Click ok


Bridge Object

�Select Bent �

�Press modify and show

�Select BDIA1 from

diaphragm ( this is the

diaphragm we define before in

slight 11)

� we have to define bent

location top of the deck from

bent location elevation ( global

Z) is -4.2417


�Elevation at layout line

(Global Z) is 3.7417 ( 5 in. less

than elevation ( global Z) ) see

fig

�Click ok

�Then ok and ok to go main

page


�Click ok and ok to go main page fig


Now we Link bridge model

�Go to Bridge

�Update linked bridge model

�Maximmum segment length for deck spans is 5

�Press update as Area Object model

�And click ok


�Click set displace option

�Click extrude view and click ok

�Close one of the windows


Check model with dead load

Go to Bridge �

Update Link bridge model

Update as spine model using frame objects


�Click set displace option

�Click extrude view and click ok


�Now bridge represented by line element

�Then run the analysis by click this


�Select the Modal and click do not run case

�And press run now


�Check bending moment diagram

�Press frames /cables

�Select moment 3-3


�Unlock the model by press this lock

Go to Bridge �

Update Link bridge model

Update as area object model

And run the analysis to see bending moment diagram for individual girder


�Click on diagram and select the shell

Check the F11 as shown in figure �

Then u will have stresses under dead load as seen in next slight


�Now we will define live load

�Unlock the model by press lock

Go to Bridge �

Lane and add new bridge lane and add new lane defined from layout line

�Starting station is 1000 ft

�Center line offset is 8 ft

�And lane width is 12 ft

�And click add

�Click ok


�Click add copy of the lane

�Then enter -16 for center line offset

�Click ok and be sure that u have define lane 2 as shown in figure down

�if not u can enter values for the lane by manual one by one to obtain lane 2

�You can modify every

values by changing the

value then click on modify

�Be sure u have visible

color for lane , you can

change the color by this

button


�Go to display

�Then show lane

�Show lane width

�And be sure that u get figure below


�Now we define vehicles

�Go to bridge and vehicles

� select add vehicles

�And select HSn-44

�Then click convert to general vehicle

�Then click ok

�Click on modify /show button to see what is HSn 44


�HSn 44 shows two point load ( look the load plan ) and

�Different loading ( look the load elevation )

�You can play with values in table below to modify the loading


�We change the two point loads to line load

�Go to axis width type and select the fixed line width

�Then click on modify and do this for all three load

�Be sure u have figure below


�Now we add two more vehicles by click on add

vehicle select HSn-44L then click on convert to

general vehicle button and ok

�Then add one more vehicle and add AML by add

vehicle and select AML and click on convert to

general vehicle


�Now define vehicle class

�Go to bridge and vehicle class

�Add new vehicle class and add three pre defined vehicle

�By this operation we place all the vehicles on the bridge as in fig

� press ok and ok


�Now load cases

�Go to define and load case

�Click on add new load case

�And type load case name as Move 1

�Change load case type as moving load

�Then click on add to apply load on the lane

�In other word we order the vehicles in the way we want on the bridge lane


�Now load combination

�Go to define and load combination

�Click on add new load combination

�Click on add button to add dead load

�And select Move 1 and click on add button to add moving load

�Press ok and ok


�Now run the analysis

�Wait until analysis complete

�Close the small window when u see analysis completed successfully u will see

page below


�Now u can get any results you want from display button


�Now unlock the model to see the load pattern for moving load

�Go to define and load pattern

�Type load pattern name as moving load and type as bridge live

�Click on add bridge load pattern on right side of the window

�Then click on modify the bridge live load as shown in fig below


�Add the vehicles one by one and obtain the final figure of the box as in fig

below then click ok


�Now we define an other load pattern name is move

�Click add and then modify to define vehicle order

� arrange the vehicle as in figure below

�Then press ok and ok


�Now we define the load cases

�Go to define and load cases

�And select moving load and press on modify/select load cases

� be sure it is multi step static

�Then click ok


�Now go to move load and select the time history from the load case type

�Select the direct integration for time history type

�And set the windows as shown below


�Click on the modify/show button next to damping


�Set the windows as in the figure below to define mass and stiffness proportion

damping

�Then press ok to close this window then press ok to close previous one then

press ok last time to reach general window

�Then run the analysis


�Click on force diagram

�Then press on step as shown in figure

�Then click ok

�By this way u can see the contour step by step by clicking this button


�Now u can create video file by go to file

�Click on create video and click on create multi step video

�Then set the windows as in the figure

�Then click ok


�Go to display

�Click Show bridge forces/stresses

�U can get all the moment and shear diagrams from this page


�Now u can get all the results of structure analysis of the bridge


assoc. prof. dr. yavuz yardim

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