Short Span Steel Bridge Alliance

Transportation Engineers Association of Missouri

March 16, 2012

Dr. Michael Barker, University of Wyoming

Purpose of Presentation – Short Span Steel Bridge Alliance

To provide bridge owners and designers with steel solutions for crossings under 140 feet – increase steel market

Purpose of Presentation - Short Span Steel Bridge Alliance

To provide bridge owners and designers with steel solutions for crossings under 140 feet – increase steel market

Purpose of Presentation - Barker

• Provide bridge engineers & owners with resources to better consider steel bridges in design comparisons

• Present training & continuing education opportunities to engineers & owners

• Discuss national effort for standardized modular steel bridge construction

Today’s Presentation

• Short Span Steel Bridge Alliance (SSSBA)

• Interactive Short Span Steel Bridge WebsiteBridge Technology CenterStandard Short Simple Span Steel Bridge DesignseSPAN140 Bridge Design Interactive Software

• Training & Continuing Education

• Modular Bridge Research

Short Span Steel Bridge Alliance

• Program officially started September 1, 2007

• Objective – make steel the material of choice for short span steel bridges.

• Short span steel bridges have spans of 20’ to 140’

• First industry-wide effort to provide education and design support for short span steel bridges.

ProducersCoaters

Trade OrganizationsBridge Owners

Universities

Service Centers

Fabricators

Short Span Steel Bridge Alliance (Active Partners)• Fabricators

• Big R Manufacturing• High Steel• Roscoe Steel• Stinger Welding• Structal (Canam)• US Bridge• Wheeler Bridge

• Coaters• AZZ Galvanizing• Valmont Coatings

• Industry Associations• American Iron and Steel Institute• National Steel Bridge Alliance• National Corrugated Steel Pipe Association • Steel Fabricators of New England

Short Span Steel Bridge Alliance (Active Partners)• Owners

• National Association of County Engineers• Steel Producers

• ArcelorMittal• Nucor-Yamato Steel• Nucor Steel – Plate Group• SSAB

• Steel Service Centers• Infra-Metals• Metals USA

• Universities • West Virginia University• University of Wyoming

COMING SOON!: www.ShortSpanSteelBridges.org

Target Audience

• County Engineers

• State DOT and Federal Highway Officials

• Bridge Designers and Consultants

Website Highlights• Steel Solution

• Catalog of steel solutions available, including superstructure, substructure, decks, modular systems, secondary elements, and transporters.

• Case Studies• Technical articles/videos detailing how other counties and DOTs have used steel to

save time and money utilizing a variety of steel solutions. • Video and Photo Gallery

• Video – expert testimonies regarding cost considerations, design tips, modular construction, coatings, etc.

• Photo – collection of short span photos (truss, plate, rolled beam, CSP, etc.)• Ask the Expert

• A collection of short span experts who can handle just about any question• Blog

• Up-to-date information on short span topics of interest to bridge owners and designers

Website Highlights• Social Media

• Follow us on Twitter and connect on LinkedIn • Design Aids / Research

• Design aids and research reports on short span bridges• Email Newsletter

• Sign up today to get the latest update on short span steel bridge activities and events

White Paper / Case Studies

Videos – more & searchable

Expert Support Resource

Standard Short Span Steel Bridge Designs

Goal:• Economically competitive• Expedite and Economize the Design Process• Simple Repetitive Details and Member Sizes.

Bridge Parameters•Span Lengths: 40 ft to 140 ft•Girder Spacing: 6 ft, 7.5 ft, 9 ft and 10.5 ft•Homogeneous and hybrid plate girders with limited plate sizes•Limited depth and lightest weight rolled sections•Selective Cross-Frame Placement & Design

Standards

Homogeneous PL Girders (S = 7.5’)

Rolled Beam Designs

Typical Girder Details

Economical Diaphragm Details

Bearing Details

Compare to Older AISI Standard Designs

0.00

5.00

10.00

15.00

20.00

25.00

0 20 40 60 80 100 120

Wei

ght (

tons

)

Span Length (ft)

WVU (S = 9 ft - 0 in)

AISI (S = 9 ft - 0 in)

• Free resource available to bridge owners and designers with questions related to:

• Standard design and details of short span bridges (plate & rolled beam)• Standard design and details of corrugated steel pipe and structural plate.

The Bridge Technology Center

One stop for customized steel bridge and culvert solutions

* Standard designs & details for short span steel crossing - Rolled Beam & Plate Girders- Corrugated Pipe (CSP & structural plate)

* Manufacturer's steel solutions (SSSBA Members)

How it works

Step 1 – Create an Account- Develop an account complete with username/password

Step 2 – Input Information About Your Specific Project/Crossing

• Span Length

• Number of Striped Traffic Lanes

• Roadway Width

• Pedestrian Access / sidewalks

• Skew Angle

• Average Daily Traffic (ADT)

• Design Speed

• Waterway Area (CSP)

• Height of Cover (CSP)

Step 3 – Customized Solutions Book is Provided Based on Your Input

Standard Design and Details of Short Span Steel Bridges Solutions• Rolled Beam Recommendations• Plate Girder Recommendations

Standard Design and Details of Corrugated Steel Pipe and Structural Plate Solutions

Manufacturer’s Steel Solutions (SSSBA Members) • Customized Solutions from Members of the SSSBA

Durability Solutions (SSSBA Members) • Galvanized & Paint• Weathering Steel

Additional Contact Information• Producers• Service Centers• Fabricators• Coaters• Industry Organizations

Sign-Up on www.ShortSpanSteelBridges.org to Receive Notification When Available

(June 2012)

www.ShortSpanSteelBridges.org

Training & Continuing Education

½ Day Short Span Steel Bridge Workshops• 15-20 over the next 3 years: LTAP, DOT & Consultants• SSSBA Overview & Interactive Website• Standards, Design Aids, Design Examples• Economical & Practical Design Issues• Case Studies• Coatings

Forums

• Steel Bridge Forums• Partnership with NSBA• 3-4 in 2012• Full Day• DOT Focused• Agenda customized to DOT’s Needs

National Research in Modular Steel Bridge Construction

Survey Bridge Owners to Determine Needs• AASHTO T-14 (DOT)• NACE Structures Committee (County)• Selected other DOTs

Identify the bridge systems which have the most promise for mainstream use -- “in order to provide a cost-effective short span steel bridge, with modular components, which meets the needs of today’s bridge owners.”

Press-Brake Tub Module Two-Girder Module

National Research in Modular Steel Bridge Construction

2011 Chicago Mtg, SSSBA member steel producers, fabricators, state DOT engineers, researchers and bridge producers:

Proposed Steel Industry & DOT Pooled Fund StudyDevelop Standard Modular Designs:Simple Span

2-girder I-shape modulesCIP deck w/ in-place forms & rebar cagesThin pretopped deck & topping/closure CIP deckFull pretopped deck & closure CIP deckThin PC deck & topping/closure CIP deckFull PC deck & closure CIPGrid steel deck

Press-brake tub girder modulesThin pretopped deck & topping/closure CIP deckFull pretopped deck & closure CIP deck

Skewed designs for I-shape module & press-brake moduleMulti-Span (3 span)

2-girder I-shape modules (drop in center)CIP deck w/ in-place forms & rebar cagesThin pretopped deck & toppiing/closure CIP deckFull pretopped deck & closure CIP deckThin PC deck & topping/closure CIP deckFull PC deck & closure CIPGrid steel deck

Skewed designs for I-shape module

Experimental Test Select Designs:Simple-Span Single-Unit modular designs

2-girder I-shape moduleGrid steel deck

Press-brake tub girder modulesFull pretopped deck

Simple Span Two-Unit modular system designs (Side-by-Side)2-girder I-shape modules

CIP deck w/ in-place forms & rebar cagesThin PC deck & topping/closure CIP deckFull PC deck & closure CIPGrid steel deck

Press-brake tub girder modulesThin pretopped deck & topping/closure CIP deckFull pretopped deck & closure CIP deck

Multi-Span (3 span) Two-Unit modular system designs (Side-by-Side)2-girder I-shape modules (drop in center)

CIP deck w/ in-place forms & rebar cagesThin pretopped deck & topping/closure CIP deckGrid steel deck

Summary

SSSBA has produced Resources so that Steel Bridges can Efficiently be Considered

We Hope Missouri Accepts an Invitation to Host a Short Span Workshop or a Steel Bridge Forum

We Desire the Chance to Discuss Pooled Fund Research on the Modular Steel Bridge Research