corrugated deck rating - aashtoware bridge

AASHTOWare BrR/BrD 6.8

Steel Tutorial Corrugated Deck Rating

STL10 - Corrugated Deck Rating

Last Modified: 11/2/2020 1

37'-0"

3'-6" 3 spaces @ 10'-0" = 30'-0" 3'-6"

8" including 1/2" integral

wearing surface

34'-0" 1'-6"1'-6"

STL6 - Two Span Plate Girder Example (VO 6.3)

90'-0"

Span 1

2 spaces @ 32'-0"

10'-0

"1

0'-0

"1

0'-0

"

Framing Plan

2 spaces @ 32'-0"

90'-0"

Span 2

2 @13'-0" 2@13'-0"CrossFrame

Spacing

CL End

Bearing

CL End

BearingCL Pier

FWS @ 25 psf

2" deep steel corrugated

plank



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6"

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120" Eff. Width (LRFD)

Composite Section at Pier

2"

9" 4" 5"

32"

7"

3"

Parapet Detail

Weight = 536 plf

8" total

2"

Section Detail

Material Properties

Structural Steel: AASHTO M270, Grade 50W uncoated weathering steel with Fy = 50 ksi

Deck Concrete: f'c = 4.0 ksi, modular ratio n = 8

Slab Reinforcing Steel: AASHTO M31, Grade 60 with Fy = 60 ksi

2" Corrugated steel plank: Grade 50 galvanized steel

Cross Frame Connection Plates: 3/4" x 6"

Bearing Stiffener Plates: 7/8" x 9"



2"

9" 4" 5"

32"

7"

3"

Parapet Detail

Weight = 536 plf

8" total

2"

Section Detail

Material Properties









2"

9" 4" 5"

32"

7"

3"

Parapet Detail

Weight = 536 plf

8" total

2"

Section Detail

Material Properties









2"

9" 4" 5"

32"

7"

3"

Parapet Detail

Weight = 536 plf

8" total

2"

Section Detail

Material Properties









Cross-Section of Corrugated Deck

2"

6" Pitch

This example assumes you have worked through STL11 - Steel Plate Girder Using AASHTO LRFD Engine

Open the Bridge Workspace for ‘Stl6_Training’ or import the STL10 - Corrugated Deck Rating.xml bridge file.



Begin a new SUPERSTRUCTURE DEFINITION for a steel girder corrugated deck system.



Expanding the branch for the Corrugated Deck – Steel Beam the Bridge Workspace will look like:

Much of the data entry will be the same as with the original STL6 example. Impact, Load Case Description, and

framing plan will be set up the same as for the original STL6 example.



Go through:

• Impact/Dynamic Load Allowance

• Load Case Description

• Framing Plan Detail

• Structure Typical Section

• Superstructure Loads

Enter the data from the original bridge definition to the Corrugated Deck bridge definition.



You will see that the Superstructure Typical Section lacks a few tabs. The remaining tabs are similar to the dialog

for a common concrete deck/steel girder typical definition.

Once you have entered the above to define the Corrugated Deck definition you need to enter the details for the deck

itself.

Copy the stiffener definitions from the original bridge definition to the Corrugated Deck definition. You will need to

edit the titles of each to remove “Copy of” from the title.



Open the MEMBER ALTERNATIVES for Girder G2 for the original bridge definition and the new Corrugated Deck

definition. You will not be able to copy the member definition because there are small differences in the definitions.

For example, the Corrugated Deck will not have haunches. Go through the original member definition and reenter

the data in the new member definition where such data is similar.

BrR has the ability to compute the Standard Specification live load distribution factors for you based on the corrugated

deck definition. You can click the ‘Compute from Typical Section…’ button and BrR will compute the distribution

factors. If you leave these fields blank, the AASHTO LFD engine will compute the distribution factors for you at



runtime. We will let the AASHTO LFD engine compute the live load distribution factors for us so we will not enter

them. The following figure shows the differences in the LLDF for LFD.



At this point, run a LFD rating on the deck for the Corrugated Deck definition and the girder G2. Right click on the

Deck line and select Analyze.



Open the analysis results to see the ratings.

Then do a rating on the new girder.



Corrugated Specifications Check

Open the specifications checks for the corrugated deck.

The girder ratings will be similar to non-composite girder ratings.

corrugated deck rating - aashtoware bridge

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